3/8" Diameter | UNDER CONTROL INSTRUMENTS LTD

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<img width="450" height="450" src="https://undercontrol.co.uk/wp-content/uploads/2019/10/cartridgeheater-front-sq-450x450.jpg" class="attachment-woocommerce_thumbnail size-woocommerce_thumbnail" alt="" decoding="async" srcset="https://undercontrol.co.uk/wp-content/uploads/2019/10/cartridgeheater-front-sq-450x450.jpg 450w, https://undercontrol.co.uk/wp-content/uploads/2019/10/cartridgeheater-front-sq-150x150.jpg 150w, https://undercontrol.co.uk/wp-content/uploads/2019/10/cartridgeheater-front-sq-700x700.jpg 700w, https://undercontrol.co.uk/wp-content/uploads/2019/10/cartridgeheater-front-sq-300x300.jpg 300w, https://undercontrol.co.uk/wp-content/uploads/2019/10/cartridgeheater-front-sq-768x768.jpg 768w, https://undercontrol.co.uk/wp-content/uploads/2019/10/cartridgeheater-front-sq.jpg 824w" sizes="(max-width: 450px) 100vw, 450px" />

3/8″ Cartridge Heater

Cartridge Heaters

Rated 5.00 out of 5

£10.08 – £14.21

<img width="450" height="450" alt="" decoding="async" data-srcset="https://undercontrol.co.uk/wp-content/uploads/2019/02/Cartridge-heater-1.5-1-450x450.jpg 450w, https://undercontrol.co.uk/wp-content/uploads/2019/02/Cartridge-heater-1.5-1-150x150.jpg 150w" data-src="https://undercontrol.co.uk/wp-content/uploads/2019/02/Cartridge-heater-1.5-1-450x450.jpg" data-sizes="(max-width: 450px) 100vw, 450px" class="attachment-woocommerce_thumbnail size-woocommerce_thumbnail lazyload" src="data:image/gif;base64,R0lGODlhAQABAAAAACH5BAEKAAEALAAAAAABAAEAAAICTAEAOw==" /><noscript><img width="450" height="450" alt="" decoding="async" data-srcset="https://undercontrol.co.uk/wp-content/uploads/2019/02/Cartridge-heater-1.5-1-450x450.jpg 450w, https://undercontrol.co.uk/wp-content/uploads/2019/02/Cartridge-heater-1.5-1-150x150.jpg 150w" data-src="https://undercontrol.co.uk/wp-content/uploads/2019/02/Cartridge-heater-1.5-1-450x450.jpg" data-sizes="(max-width: 450px) 100vw, 450px" class="attachment-woocommerce_thumbnail size-woocommerce_thumbnail lazyload" src="data:image/gif;base64,R0lGODlhAQABAAAAACH5BAEKAAEALAAAAAABAAEAAAICTAEAOw==" /><noscript><img width="450" height="450" src="https://undercontrol.co.uk/wp-content/uploads/2019/02/Cartridge-heater-1.5-1-450x450.jpg" class="attachment-woocommerce_thumbnail size-woocommerce_thumbnail" alt="" decoding="async" srcset="https://undercontrol.co.uk/wp-content/uploads/2019/02/Cartridge-heater-1.5-1-450x450.jpg 450w, https://undercontrol.co.uk/wp-content/uploads/2019/02/Cartridge-heater-1.5-1-150x150.jpg 150w" sizes="(max-width: 450px) 100vw, 450px" />

3/8″ Cartridge Heater – 1.5″, 100w, 240v

Cartridge Heaters

Rated 5.00 out of 5

£10.08

<img width="450" height="450" alt="" decoding="async" data-srcset="https://undercontrol.co.uk/wp-content/uploads/2019/02/cartridge-heater-3-1-450x450.jpg 450w, https://undercontrol.co.uk/wp-content/uploads/2019/02/cartridge-heater-3-1-150x150.jpg 150w" data-src="https://undercontrol.co.uk/wp-content/uploads/2019/02/cartridge-heater-3-1-450x450.jpg" data-sizes="(max-width: 450px) 100vw, 450px" class="attachment-woocommerce_thumbnail size-woocommerce_thumbnail lazyload" src="data:image/gif;base64,R0lGODlhAQABAAAAACH5BAEKAAEALAAAAAABAAEAAAICTAEAOw==" /><noscript><img width="450" height="450" alt="" decoding="async" data-srcset="https://undercontrol.co.uk/wp-content/uploads/2019/02/cartridge-heater-3-1-450x450.jpg 450w, https://undercontrol.co.uk/wp-content/uploads/2019/02/cartridge-heater-3-1-150x150.jpg 150w" data-src="https://undercontrol.co.uk/wp-content/uploads/2019/02/cartridge-heater-3-1-450x450.jpg" data-sizes="(max-width: 450px) 100vw, 450px" class="attachment-woocommerce_thumbnail size-woocommerce_thumbnail lazyload" src="data:image/gif;base64,R0lGODlhAQABAAAAACH5BAEKAAEALAAAAAABAAEAAAICTAEAOw==" /><noscript><img width="450" height="450" src="https://undercontrol.co.uk/wp-content/uploads/2019/02/cartridge-heater-3-1-450x450.jpg" class="attachment-woocommerce_thumbnail size-woocommerce_thumbnail" alt="" decoding="async" srcset="https://undercontrol.co.uk/wp-content/uploads/2019/02/cartridge-heater-3-1-450x450.jpg 450w, https://undercontrol.co.uk/wp-content/uploads/2019/02/cartridge-heater-3-1-150x150.jpg 150w" sizes="(max-width: 450px) 100vw, 450px" />

3/8″ Cartridge Heater – 3″, 250w, 120v

Cartridge Heaters

Rated 5.00 out of 5

£11.40

<img width="450" height="450" alt="" decoding="async" data-srcset="https://undercontrol.co.uk/wp-content/uploads/2019/02/cartridge-heater-3-1-450x450.jpg 450w, https://undercontrol.co.uk/wp-content/uploads/2019/02/cartridge-heater-3-1-150x150.jpg 150w" data-src="https://undercontrol.co.uk/wp-content/uploads/2019/02/cartridge-heater-3-1-450x450.jpg" data-sizes="(max-width: 450px) 100vw, 450px" class="attachment-woocommerce_thumbnail size-woocommerce_thumbnail lazyload" src="data:image/gif;base64,R0lGODlhAQABAAAAACH5BAEKAAEALAAAAAABAAEAAAICTAEAOw==" /><noscript><img width="450" height="450" alt="" decoding="async" data-srcset="https://undercontrol.co.uk/wp-content/uploads/2019/02/cartridge-heater-3-1-450x450.jpg 450w, https://undercontrol.co.uk/wp-content/uploads/2019/02/cartridge-heater-3-1-150x150.jpg 150w" data-src="https://undercontrol.co.uk/wp-content/uploads/2019/02/cartridge-heater-3-1-450x450.jpg" data-sizes="(max-width: 450px) 100vw, 450px" class="attachment-woocommerce_thumbnail size-woocommerce_thumbnail lazyload" src="data:image/gif;base64,R0lGODlhAQABAAAAACH5BAEKAAEALAAAAAABAAEAAAICTAEAOw==" /><noscript><img width="450" height="450" src="https://undercontrol.co.uk/wp-content/uploads/2019/02/cartridge-heater-3-1-450x450.jpg" class="attachment-woocommerce_thumbnail size-woocommerce_thumbnail" alt="" decoding="async" srcset="https://undercontrol.co.uk/wp-content/uploads/2019/02/cartridge-heater-3-1-450x450.jpg 450w, https://undercontrol.co.uk/wp-content/uploads/2019/02/cartridge-heater-3-1-150x150.jpg 150w" sizes="(max-width: 450px) 100vw, 450px" />

3/8″ Cartridge Heater – 3″, 250w, 240v

Cartridge Heaters

Rated 5.00 out of 5

£10.96

<img width="450" height="450" alt="" decoding="async" data-srcset="https://undercontrol.co.uk/wp-content/uploads/2019/02/cartridge-heater-2-1-450x450.jpg 450w, https://undercontrol.co.uk/wp-content/uploads/2019/02/cartridge-heater-2-1-150x150.jpg 150w" data-src="https://undercontrol.co.uk/wp-content/uploads/2019/02/cartridge-heater-2-1-450x450.jpg" data-sizes="(max-width: 450px) 100vw, 450px" class="attachment-woocommerce_thumbnail size-woocommerce_thumbnail lazyload" src="data:image/gif;base64,R0lGODlhAQABAAAAACH5BAEKAAEALAAAAAABAAEAAAICTAEAOw==" /><noscript><img width="450" height="450" alt="" decoding="async" data-srcset="https://undercontrol.co.uk/wp-content/uploads/2019/02/cartridge-heater-2-1-450x450.jpg 450w, https://undercontrol.co.uk/wp-content/uploads/2019/02/cartridge-heater-2-1-150x150.jpg 150w" data-src="https://undercontrol.co.uk/wp-content/uploads/2019/02/cartridge-heater-2-1-450x450.jpg" data-sizes="(max-width: 450px) 100vw, 450px" class="attachment-woocommerce_thumbnail size-woocommerce_thumbnail lazyload" src="data:image/gif;base64,R0lGODlhAQABAAAAACH5BAEKAAEALAAAAAABAAEAAAICTAEAOw==" /><noscript><img width="450" height="450" alt="" decoding="async" data-srcset="https://undercontrol.co.uk/wp-content/uploads/2019/02/cartridge-heater-2-1-450x450.jpg 450w, https://undercontrol.co.uk/wp-content/uploads/2019/02/cartridge-heater-2-1-150x150.jpg 150w" data-src="https://undercontrol.co.uk/wp-content/uploads/2019/02/cartridge-heater-2-1-450x450.jpg" data-sizes="(max-width: 450px) 100vw, 450px" class="attachment-woocommerce_thumbnail size-woocommerce_thumbnail lazyload" src="data:image/gif;base64,R0lGODlhAQABAAAAACH5BAEKAAEALAAAAAABAAEAAAICTAEAOw==" /><noscript><img width="450" height="450" src="https://undercontrol.co.uk/wp-content/uploads/2019/02/cartridge-heater-2-1-450x450.jpg" class="attachment-woocommerce_thumbnail size-woocommerce_thumbnail" alt="" decoding="async" srcset="https://undercontrol.co.uk/wp-content/uploads/2019/02/cartridge-heater-2-1-450x450.jpg 450w, https://undercontrol.co.uk/wp-content/uploads/2019/02/cartridge-heater-2-1-150x150.jpg 150w" sizes="(max-width: 450px) 100vw, 450px" />

3/8″ Cartridge Heater – 2″, 70w, 240v

Cartridge Heaters

Rated 5.00 out of 5

£10.28

<img width="450" height="450" alt="" decoding="async" data-srcset="https://undercontrol.co.uk/wp-content/uploads/2019/02/cartridge-heater-2-1-450x450.jpg 450w, https://undercontrol.co.uk/wp-content/uploads/2019/02/cartridge-heater-2-1-150x150.jpg 150w" data-src="https://undercontrol.co.uk/wp-content/uploads/2019/02/cartridge-heater-2-1-450x450.jpg" data-sizes="(max-width: 450px) 100vw, 450px" class="attachment-woocommerce_thumbnail size-woocommerce_thumbnail lazyload" src="data:image/gif;base64,R0lGODlhAQABAAAAACH5BAEKAAEALAAAAAABAAEAAAICTAEAOw==" /><noscript><img width="450" height="450" alt="" decoding="async" data-srcset="https://undercontrol.co.uk/wp-content/uploads/2019/02/cartridge-heater-2-1-450x450.jpg 450w, https://undercontrol.co.uk/wp-content/uploads/2019/02/cartridge-heater-2-1-150x150.jpg 150w" data-src="https://undercontrol.co.uk/wp-content/uploads/2019/02/cartridge-heater-2-1-450x450.jpg" data-sizes="(max-width: 450px) 100vw, 450px" class="attachment-woocommerce_thumbnail size-woocommerce_thumbnail lazyload" src="data:image/gif;base64,R0lGODlhAQABAAAAACH5BAEKAAEALAAAAAABAAEAAAICTAEAOw==" /><noscript><img width="450" height="450" alt="" decoding="async" data-srcset="https://undercontrol.co.uk/wp-content/uploads/2019/02/cartridge-heater-2-1-450x450.jpg 450w, https://undercontrol.co.uk/wp-content/uploads/2019/02/cartridge-heater-2-1-150x150.jpg 150w" data-src="https://undercontrol.co.uk/wp-content/uploads/2019/02/cartridge-heater-2-1-450x450.jpg" data-sizes="(max-width: 450px) 100vw, 450px" class="attachment-woocommerce_thumbnail size-woocommerce_thumbnail lazyload" src="data:image/gif;base64,R0lGODlhAQABAAAAACH5BAEKAAEALAAAAAABAAEAAAICTAEAOw==" /><noscript><img width="450" height="450" src="https://undercontrol.co.uk/wp-content/uploads/2019/02/cartridge-heater-2-1-450x450.jpg" class="attachment-woocommerce_thumbnail size-woocommerce_thumbnail" alt="" decoding="async" srcset="https://undercontrol.co.uk/wp-content/uploads/2019/02/cartridge-heater-2-1-450x450.jpg 450w, https://undercontrol.co.uk/wp-content/uploads/2019/02/cartridge-heater-2-1-150x150.jpg 150w" sizes="(max-width: 450px) 100vw, 450px" />

3/8″ Cartridge Heater – 2″, 200w, 240v

Cartridge Heaters

Rated 5.00 out of 5

£10.28

<img width="450" height="450" alt="" decoding="async" data-srcset="https://undercontrol.co.uk/wp-content/uploads/2019/02/cartridge-heater-2-1-450x450.jpg 450w, https://undercontrol.co.uk/wp-content/uploads/2019/02/cartridge-heater-2-1-150x150.jpg 150w" data-src="https://undercontrol.co.uk/wp-content/uploads/2019/02/cartridge-heater-2-1-450x450.jpg" data-sizes="(max-width: 450px) 100vw, 450px" class="attachment-woocommerce_thumbnail size-woocommerce_thumbnail lazyload" src="data:image/gif;base64,R0lGODlhAQABAAAAACH5BAEKAAEALAAAAAABAAEAAAICTAEAOw==" /><noscript><img width="450" height="450" alt="" decoding="async" data-srcset="https://undercontrol.co.uk/wp-content/uploads/2019/02/cartridge-heater-2-1-450x450.jpg 450w, https://undercontrol.co.uk/wp-content/uploads/2019/02/cartridge-heater-2-1-150x150.jpg 150w" data-src="https://undercontrol.co.uk/wp-content/uploads/2019/02/cartridge-heater-2-1-450x450.jpg" data-sizes="(max-width: 450px) 100vw, 450px" class="attachment-woocommerce_thumbnail size-woocommerce_thumbnail lazyload" src="data:image/gif;base64,R0lGODlhAQABAAAAACH5BAEKAAEALAAAAAABAAEAAAICTAEAOw==" /><noscript><img width="450" height="450" alt="" decoding="async" data-srcset="https://undercontrol.co.uk/wp-content/uploads/2019/02/cartridge-heater-2-1-450x450.jpg 450w, https://undercontrol.co.uk/wp-content/uploads/2019/02/cartridge-heater-2-1-150x150.jpg 150w" data-src="https://undercontrol.co.uk/wp-content/uploads/2019/02/cartridge-heater-2-1-450x450.jpg" data-sizes="(max-width: 450px) 100vw, 450px" class="attachment-woocommerce_thumbnail size-woocommerce_thumbnail lazyload" src="data:image/gif;base64,R0lGODlhAQABAAAAACH5BAEKAAEALAAAAAABAAEAAAICTAEAOw==" /><noscript><img width="450" height="450" src="https://undercontrol.co.uk/wp-content/uploads/2019/02/cartridge-heater-2-1-450x450.jpg" class="attachment-woocommerce_thumbnail size-woocommerce_thumbnail" alt="" decoding="async" srcset="https://undercontrol.co.uk/wp-content/uploads/2019/02/cartridge-heater-2-1-450x450.jpg 450w, https://undercontrol.co.uk/wp-content/uploads/2019/02/cartridge-heater-2-1-150x150.jpg 150w" sizes="(max-width: 450px) 100vw, 450px" />

3/8″ Cartridge Heater – 2″, 150w, 240v

Cartridge Heaters

Rated 5.00 out of 5

£10.28

<img width="450" height="450" alt="" decoding="async" data-srcset="https://undercontrol.co.uk/wp-content/uploads/2019/02/cartridge-heater-2-1-450x450.jpg 450w, https://undercontrol.co.uk/wp-content/uploads/2019/02/cartridge-heater-2-1-150x150.jpg 150w" data-src="https://undercontrol.co.uk/wp-content/uploads/2019/02/cartridge-heater-2-1-450x450.jpg" data-sizes="(max-width: 450px) 100vw, 450px" class="attachment-woocommerce_thumbnail size-woocommerce_thumbnail lazyload" src="data:image/gif;base64,R0lGODlhAQABAAAAACH5BAEKAAEALAAAAAABAAEAAAICTAEAOw==" /><noscript><img width="450" height="450" alt="" decoding="async" data-srcset="https://undercontrol.co.uk/wp-content/uploads/2019/02/cartridge-heater-2-1-450x450.jpg 450w, https://undercontrol.co.uk/wp-content/uploads/2019/02/cartridge-heater-2-1-150x150.jpg 150w" data-src="https://undercontrol.co.uk/wp-content/uploads/2019/02/cartridge-heater-2-1-450x450.jpg" data-sizes="(max-width: 450px) 100vw, 450px" class="attachment-woocommerce_thumbnail size-woocommerce_thumbnail lazyload" src="data:image/gif;base64,R0lGODlhAQABAAAAACH5BAEKAAEALAAAAAABAAEAAAICTAEAOw==" /><noscript><img width="450" height="450" alt="" decoding="async" data-srcset="https://undercontrol.co.uk/wp-content/uploads/2019/02/cartridge-heater-2-1-450x450.jpg 450w, https://undercontrol.co.uk/wp-content/uploads/2019/02/cartridge-heater-2-1-150x150.jpg 150w" data-src="https://undercontrol.co.uk/wp-content/uploads/2019/02/cartridge-heater-2-1-450x450.jpg" data-sizes="(max-width: 450px) 100vw, 450px" class="attachment-woocommerce_thumbnail size-woocommerce_thumbnail lazyload" src="data:image/gif;base64,R0lGODlhAQABAAAAACH5BAEKAAEALAAAAAABAAEAAAICTAEAOw==" /><noscript><img width="450" height="450" src="https://undercontrol.co.uk/wp-content/uploads/2019/02/cartridge-heater-2-1-450x450.jpg" class="attachment-woocommerce_thumbnail size-woocommerce_thumbnail" alt="" decoding="async" srcset="https://undercontrol.co.uk/wp-content/uploads/2019/02/cartridge-heater-2-1-450x450.jpg 450w, https://undercontrol.co.uk/wp-content/uploads/2019/02/cartridge-heater-2-1-150x150.jpg 150w" sizes="(max-width: 450px) 100vw, 450px" />

3/8″ Cartridge Heater – 2″, 100w, 120v

Cartridge Heaters

Rated 5.00 out of 5

£10.28

<img width="450" height="450" src="https://undercontrol.co.uk/wp-content/uploads/2019/02/cartridge-heater-2.5-1-450x450.jpg" class="attachment-woocommerce_thumbnail size-woocommerce_thumbnail" alt="" decoding="async" srcset="https://undercontrol.co.uk/wp-content/uploads/2019/02/cartridge-heater-2.5-1-450x450.jpg 450w, https://undercontrol.co.uk/wp-content/uploads/2019/02/cartridge-heater-2.5-1-150x150.jpg 150w" sizes="(max-width: 450px) 100vw, 450px" />

3/8″ Cartridge Heater – 2.5″, 300w, 240v

Cartridge Heaters

Rated 5.00 out of 5

£10.70

<img width="450" height="450" alt="" decoding="async" data-srcset="https://undercontrol.co.uk/wp-content/uploads/2019/02/Cartridge-heater-1.5-1-450x450.jpg 450w, https://undercontrol.co.uk/wp-content/uploads/2019/02/Cartridge-heater-1.5-1-150x150.jpg 150w" data-src="https://undercontrol.co.uk/wp-content/uploads/2019/02/Cartridge-heater-1.5-1-450x450.jpg" data-sizes="(max-width: 450px) 100vw, 450px" class="attachment-woocommerce_thumbnail size-woocommerce_thumbnail lazyload" src="data:image/gif;base64,R0lGODlhAQABAAAAACH5BAEKAAEALAAAAAABAAEAAAICTAEAOw==" /><noscript><img width="450" height="450" alt="" decoding="async" data-srcset="https://undercontrol.co.uk/wp-content/uploads/2019/02/Cartridge-heater-1.5-1-450x450.jpg 450w, https://undercontrol.co.uk/wp-content/uploads/2019/02/Cartridge-heater-1.5-1-150x150.jpg 150w" data-src="https://undercontrol.co.uk/wp-content/uploads/2019/02/Cartridge-heater-1.5-1-450x450.jpg" data-sizes="(max-width: 450px) 100vw, 450px" class="attachment-woocommerce_thumbnail size-woocommerce_thumbnail lazyload" src="data:image/gif;base64,R0lGODlhAQABAAAAACH5BAEKAAEALAAAAAABAAEAAAICTAEAOw==" /><noscript><img width="450" height="450" src="https://undercontrol.co.uk/wp-content/uploads/2019/02/Cartridge-heater-1.5-1-450x450.jpg" class="attachment-woocommerce_thumbnail size-woocommerce_thumbnail" alt="" decoding="async" srcset="https://undercontrol.co.uk/wp-content/uploads/2019/02/Cartridge-heater-1.5-1-450x450.jpg 450w, https://undercontrol.co.uk/wp-content/uploads/2019/02/Cartridge-heater-1.5-1-150x150.jpg 150w" sizes="(max-width: 450px) 100vw, 450px" />

3/8″ Cartridge Heater – 1.5″, 50w, 120v

Cartridge Heaters

Rated 5.00 out of 5

£10.08

<img width="450" height="450" alt="" decoding="async" data-srcset="https://undercontrol.co.uk/wp-content/uploads/2019/02/Cartridge-heater-1.5-1-450x450.jpg 450w, https://undercontrol.co.uk/wp-content/uploads/2019/02/Cartridge-heater-1.5-1-150x150.jpg 150w" data-src="https://undercontrol.co.uk/wp-content/uploads/2019/02/Cartridge-heater-1.5-1-450x450.jpg" data-sizes="(max-width: 450px) 100vw, 450px" class="attachment-woocommerce_thumbnail size-woocommerce_thumbnail lazyload" src="data:image/gif;base64,R0lGODlhAQABAAAAACH5BAEKAAEALAAAAAABAAEAAAICTAEAOw==" /><noscript><img width="450" height="450" alt="" decoding="async" data-srcset="https://undercontrol.co.uk/wp-content/uploads/2019/02/Cartridge-heater-1.5-1-450x450.jpg 450w, https://undercontrol.co.uk/wp-content/uploads/2019/02/Cartridge-heater-1.5-1-150x150.jpg 150w" data-src="https://undercontrol.co.uk/wp-content/uploads/2019/02/Cartridge-heater-1.5-1-450x450.jpg" data-sizes="(max-width: 450px) 100vw, 450px" class="attachment-woocommerce_thumbnail size-woocommerce_thumbnail lazyload" src="data:image/gif;base64,R0lGODlhAQABAAAAACH5BAEKAAEALAAAAAABAAEAAAICTAEAOw==" /><noscript><img width="450" height="450" src="https://undercontrol.co.uk/wp-content/uploads/2019/02/Cartridge-heater-1.5-1-450x450.jpg" class="attachment-woocommerce_thumbnail size-woocommerce_thumbnail" alt="" decoding="async" srcset="https://undercontrol.co.uk/wp-content/uploads/2019/02/Cartridge-heater-1.5-1-450x450.jpg 450w, https://undercontrol.co.uk/wp-content/uploads/2019/02/Cartridge-heater-1.5-1-150x150.jpg 150w" sizes="(max-width: 450px) 100vw, 450px" />

3/8″ Cartridge Heater – 1.5″, 200w, 240v

Cartridge Heaters

Rated 5.00 out of 5

£10.08

<img width="450" height="450" alt="" decoding="async" data-srcset="https://undercontrol.co.uk/wp-content/uploads/2019/02/cartridge-heater-4-1-450x450.jpg 450w, https://undercontrol.co.uk/wp-content/uploads/2019/02/cartridge-heater-4-1-150x150.jpg 150w" data-src="https://undercontrol.co.uk/wp-content/uploads/2019/02/cartridge-heater-4-1-450x450.jpg" data-sizes="(max-width: 450px) 100vw, 450px" class="attachment-woocommerce_thumbnail size-woocommerce_thumbnail lazyload" src="data:image/gif;base64,R0lGODlhAQABAAAAACH5BAEKAAEALAAAAAABAAEAAAICTAEAOw==" /><noscript><img width="450" height="450" alt="" decoding="async" data-srcset="https://undercontrol.co.uk/wp-content/uploads/2019/02/cartridge-heater-4-1-450x450.jpg 450w, https://undercontrol.co.uk/wp-content/uploads/2019/02/cartridge-heater-4-1-150x150.jpg 150w" data-src="https://undercontrol.co.uk/wp-content/uploads/2019/02/cartridge-heater-4-1-450x450.jpg" data-sizes="(max-width: 450px) 100vw, 450px" class="attachment-woocommerce_thumbnail size-woocommerce_thumbnail lazyload" src="data:image/gif;base64,R0lGODlhAQABAAAAACH5BAEKAAEALAAAAAABAAEAAAICTAEAOw==" /><noscript><img width="450" height="450" alt="" decoding="async" data-srcset="https://undercontrol.co.uk/wp-content/uploads/2019/02/cartridge-heater-4-1-450x450.jpg 450w, https://undercontrol.co.uk/wp-content/uploads/2019/02/cartridge-heater-4-1-150x150.jpg 150w" data-src="https://undercontrol.co.uk/wp-content/uploads/2019/02/cartridge-heater-4-1-450x450.jpg" data-sizes="(max-width: 450px) 100vw, 450px" class="attachment-woocommerce_thumbnail size-woocommerce_thumbnail lazyload" src="data:image/gif;base64,R0lGODlhAQABAAAAACH5BAEKAAEALAAAAAABAAEAAAICTAEAOw==" /><noscript><img width="450" height="450" src="https://undercontrol.co.uk/wp-content/uploads/2019/02/cartridge-heater-4-1-450x450.jpg" class="attachment-woocommerce_thumbnail size-woocommerce_thumbnail" alt="" decoding="async" srcset="https://undercontrol.co.uk/wp-content/uploads/2019/02/cartridge-heater-4-1-450x450.jpg 450w, https://undercontrol.co.uk/wp-content/uploads/2019/02/cartridge-heater-4-1-150x150.jpg 150w" sizes="(max-width: 450px) 100vw, 450px" />

3/8″ Cartridge Heater – 4″, 350w, 240v

Cartridge Heaters

Rated 5.00 out of 5

£12.16

<img width="450" height="450" alt="" decoding="async" data-srcset="https://undercontrol.co.uk/wp-content/uploads/2019/02/cartridge-heater-4-1-450x450.jpg 450w, https://undercontrol.co.uk/wp-content/uploads/2019/02/cartridge-heater-4-1-150x150.jpg 150w" data-src="https://undercontrol.co.uk/wp-content/uploads/2019/02/cartridge-heater-4-1-450x450.jpg" data-sizes="(max-width: 450px) 100vw, 450px" class="attachment-woocommerce_thumbnail size-woocommerce_thumbnail lazyload" src="data:image/gif;base64,R0lGODlhAQABAAAAACH5BAEKAAEALAAAAAABAAEAAAICTAEAOw==" /><noscript><img width="450" height="450" alt="" decoding="async" data-srcset="https://undercontrol.co.uk/wp-content/uploads/2019/02/cartridge-heater-4-1-450x450.jpg 450w, https://undercontrol.co.uk/wp-content/uploads/2019/02/cartridge-heater-4-1-150x150.jpg 150w" data-src="https://undercontrol.co.uk/wp-content/uploads/2019/02/cartridge-heater-4-1-450x450.jpg" data-sizes="(max-width: 450px) 100vw, 450px" class="attachment-woocommerce_thumbnail size-woocommerce_thumbnail lazyload" src="data:image/gif;base64,R0lGODlhAQABAAAAACH5BAEKAAEALAAAAAABAAEAAAICTAEAOw==" /><noscript><img width="450" height="450" alt="" decoding="async" data-srcset="https://undercontrol.co.uk/wp-content/uploads/2019/02/cartridge-heater-4-1-450x450.jpg 450w, https://undercontrol.co.uk/wp-content/uploads/2019/02/cartridge-heater-4-1-150x150.jpg 150w" data-src="https://undercontrol.co.uk/wp-content/uploads/2019/02/cartridge-heater-4-1-450x450.jpg" data-sizes="(max-width: 450px) 100vw, 450px" class="attachment-woocommerce_thumbnail size-woocommerce_thumbnail lazyload" src="data:image/gif;base64,R0lGODlhAQABAAAAACH5BAEKAAEALAAAAAABAAEAAAICTAEAOw==" /><noscript><img width="450" height="450" src="https://undercontrol.co.uk/wp-content/uploads/2019/02/cartridge-heater-4-1-450x450.jpg" class="attachment-woocommerce_thumbnail size-woocommerce_thumbnail" alt="" decoding="async" srcset="https://undercontrol.co.uk/wp-content/uploads/2019/02/cartridge-heater-4-1-450x450.jpg 450w, https://undercontrol.co.uk/wp-content/uploads/2019/02/cartridge-heater-4-1-150x150.jpg 150w" sizes="(max-width: 450px) 100vw, 450px" />

3/8″ Cartridge Heater – 4″, 220w, 240v

Cartridge Heaters

Rated 5.00 out of 5

£12.16

<img width="450" height="450" alt="" decoding="async" data-srcset="https://undercontrol.co.uk/wp-content/uploads/2019/02/cartridge-heater-4-1-450x450.jpg 450w, https://undercontrol.co.uk/wp-content/uploads/2019/02/cartridge-heater-4-1-150x150.jpg 150w" data-src="https://undercontrol.co.uk/wp-content/uploads/2019/02/cartridge-heater-4-1-450x450.jpg" data-sizes="(max-width: 450px) 100vw, 450px" class="attachment-woocommerce_thumbnail size-woocommerce_thumbnail lazyload" src="data:image/gif;base64,R0lGODlhAQABAAAAACH5BAEKAAEALAAAAAABAAEAAAICTAEAOw==" /><noscript><img width="450" height="450" alt="" decoding="async" data-srcset="https://undercontrol.co.uk/wp-content/uploads/2019/02/cartridge-heater-4-1-450x450.jpg 450w, https://undercontrol.co.uk/wp-content/uploads/2019/02/cartridge-heater-4-1-150x150.jpg 150w" data-src="https://undercontrol.co.uk/wp-content/uploads/2019/02/cartridge-heater-4-1-450x450.jpg" data-sizes="(max-width: 450px) 100vw, 450px" class="attachment-woocommerce_thumbnail size-woocommerce_thumbnail lazyload" src="data:image/gif;base64,R0lGODlhAQABAAAAACH5BAEKAAEALAAAAAABAAEAAAICTAEAOw==" /><noscript><img width="450" height="450" alt="" decoding="async" data-srcset="https://undercontrol.co.uk/wp-content/uploads/2019/02/cartridge-heater-4-1-450x450.jpg 450w, https://undercontrol.co.uk/wp-content/uploads/2019/02/cartridge-heater-4-1-150x150.jpg 150w" data-src="https://undercontrol.co.uk/wp-content/uploads/2019/02/cartridge-heater-4-1-450x450.jpg" data-sizes="(max-width: 450px) 100vw, 450px" class="attachment-woocommerce_thumbnail size-woocommerce_thumbnail lazyload" src="data:image/gif;base64,R0lGODlhAQABAAAAACH5BAEKAAEALAAAAAABAAEAAAICTAEAOw==" /><noscript><img width="450" height="450" src="https://undercontrol.co.uk/wp-content/uploads/2019/02/cartridge-heater-4-1-450x450.jpg" class="attachment-woocommerce_thumbnail size-woocommerce_thumbnail" alt="" decoding="async" srcset="https://undercontrol.co.uk/wp-content/uploads/2019/02/cartridge-heater-4-1-450x450.jpg 450w, https://undercontrol.co.uk/wp-content/uploads/2019/02/cartridge-heater-4-1-150x150.jpg 150w" sizes="(max-width: 450px) 100vw, 450px" />

3/8″ Cartridge Heater – 4″, 350w, 120v

Cartridge Heaters

Rated 5.00 out of 5

£12.16

<img width="450" height="450" alt="" decoding="async" data-srcset="https://undercontrol.co.uk/wp-content/uploads/2019/02/cartridge-heater-3-1-450x450.jpg 450w, https://undercontrol.co.uk/wp-content/uploads/2019/02/cartridge-heater-3-1-150x150.jpg 150w" data-src="https://undercontrol.co.uk/wp-content/uploads/2019/02/cartridge-heater-3-1-450x450.jpg" data-sizes="(max-width: 450px) 100vw, 450px" class="attachment-woocommerce_thumbnail size-woocommerce_thumbnail lazyload" src="data:image/gif;base64,R0lGODlhAQABAAAAACH5BAEKAAEALAAAAAABAAEAAAICTAEAOw==" /><noscript><img width="450" height="450" alt="" decoding="async" data-srcset="https://undercontrol.co.uk/wp-content/uploads/2019/02/cartridge-heater-3-1-450x450.jpg 450w, https://undercontrol.co.uk/wp-content/uploads/2019/02/cartridge-heater-3-1-150x150.jpg 150w" data-src="https://undercontrol.co.uk/wp-content/uploads/2019/02/cartridge-heater-3-1-450x450.jpg" data-sizes="(max-width: 450px) 100vw, 450px" class="attachment-woocommerce_thumbnail size-woocommerce_thumbnail lazyload" src="data:image/gif;base64,R0lGODlhAQABAAAAACH5BAEKAAEALAAAAAABAAEAAAICTAEAOw==" /><noscript><img width="450" height="450" src="https://undercontrol.co.uk/wp-content/uploads/2019/02/cartridge-heater-3-1-450x450.jpg" class="attachment-woocommerce_thumbnail size-woocommerce_thumbnail" alt="" decoding="async" srcset="https://undercontrol.co.uk/wp-content/uploads/2019/02/cartridge-heater-3-1-450x450.jpg 450w, https://undercontrol.co.uk/wp-content/uploads/2019/02/cartridge-heater-3-1-150x150.jpg 150w" sizes="(max-width: 450px) 100vw, 450px" />

3/8″ Cartridge Heater – 3″, 400w, 240v

Cartridge Heaters

Rated 5.00 out of 5

£11.40

<img width="450" height="450" alt="" decoding="async" data-srcset="https://undercontrol.co.uk/wp-content/uploads/2019/02/cartridge-heater-3.5-1-450x450.jpg 450w, https://undercontrol.co.uk/wp-content/uploads/2019/02/cartridge-heater-3.5-1-150x150.jpg 150w" data-src="https://undercontrol.co.uk/wp-content/uploads/2019/02/cartridge-heater-3.5-1-450x450.jpg" data-sizes="(max-width: 450px) 100vw, 450px" class="attachment-woocommerce_thumbnail size-woocommerce_thumbnail lazyload" src="data:image/gif;base64,R0lGODlhAQABAAAAACH5BAEKAAEALAAAAAABAAEAAAICTAEAOw==" /><noscript><img width="450" height="450" src="https://undercontrol.co.uk/wp-content/uploads/2019/02/cartridge-heater-3.5-1-450x450.jpg" class="attachment-woocommerce_thumbnail size-woocommerce_thumbnail" alt="" decoding="async" srcset="https://undercontrol.co.uk/wp-content/uploads/2019/02/cartridge-heater-3.5-1-450x450.jpg 450w, https://undercontrol.co.uk/wp-content/uploads/2019/02/cartridge-heater-3.5-1-150x150.jpg 150w" sizes="(max-width: 450px) 100vw, 450px" />

3/8″ Cartridge Heater – 3.5″, 300w, 240v

Cartridge Heaters

Rated 5.00 out of 5

£12.16

<img width="450" height="450" alt="" decoding="async" data-srcset="https://undercontrol.co.uk/wp-content/uploads/2019/02/cartridge-heater-3.5-1-450x450.jpg 450w, https://undercontrol.co.uk/wp-content/uploads/2019/02/cartridge-heater-3.5-1-150x150.jpg 150w" data-src="https://undercontrol.co.uk/wp-content/uploads/2019/02/cartridge-heater-3.5-1-450x450.jpg" data-sizes="(max-width: 450px) 100vw, 450px" class="attachment-woocommerce_thumbnail size-woocommerce_thumbnail lazyload" src="data:image/gif;base64,R0lGODlhAQABAAAAACH5BAEKAAEALAAAAAABAAEAAAICTAEAOw==" /><noscript><img width="450" height="450" src="https://undercontrol.co.uk/wp-content/uploads/2019/02/cartridge-heater-3.5-1-450x450.jpg" class="attachment-woocommerce_thumbnail size-woocommerce_thumbnail" alt="" decoding="async" srcset="https://undercontrol.co.uk/wp-content/uploads/2019/02/cartridge-heater-3.5-1-450x450.jpg 450w, https://undercontrol.co.uk/wp-content/uploads/2019/02/cartridge-heater-3.5-1-150x150.jpg 150w" sizes="(max-width: 450px) 100vw, 450px" />

3/8″ Cartridge Heater – 3.5″, 150w, 240v

Cartridge Heaters

Rated 5.00 out of 5

£12.16

<img width="450" height="450" src="https://undercontrol.co.uk/wp-content/uploads/2019/02/cartridge-heater-6-1-450x450.jpg" class="attachment-woocommerce_thumbnail size-woocommerce_thumbnail" alt="" decoding="async" srcset="https://undercontrol.co.uk/wp-content/uploads/2019/02/cartridge-heater-6-1-450x450.jpg 450w, https://undercontrol.co.uk/wp-content/uploads/2019/02/cartridge-heater-6-1-150x150.jpg 150w" sizes="(max-width: 450px) 100vw, 450px" />

3/8″ Cartridge Heater – 6″, 350w, 240v

Cartridge Heaters

Rated 5.00 out of 5

£14.21

<img width="450" height="450" alt="" decoding="async" data-srcset="https://undercontrol.co.uk/wp-content/uploads/2019/02/cartridge-heater-5-1-450x450.jpg 450w, https://undercontrol.co.uk/wp-content/uploads/2019/02/cartridge-heater-5-1-150x150.jpg 150w" data-src="https://undercontrol.co.uk/wp-content/uploads/2019/02/cartridge-heater-5-1-450x450.jpg" data-sizes="(max-width: 450px) 100vw, 450px" class="attachment-woocommerce_thumbnail size-woocommerce_thumbnail lazyload" src="data:image/gif;base64,R0lGODlhAQABAAAAACH5BAEKAAEALAAAAAABAAEAAAICTAEAOw==" /><noscript><img width="450" height="450" src="https://undercontrol.co.uk/wp-content/uploads/2019/02/cartridge-heater-5-1-450x450.jpg" class="attachment-woocommerce_thumbnail size-woocommerce_thumbnail" alt="" decoding="async" srcset="https://undercontrol.co.uk/wp-content/uploads/2019/02/cartridge-heater-5-1-450x450.jpg 450w, https://undercontrol.co.uk/wp-content/uploads/2019/02/cartridge-heater-5-1-150x150.jpg 150w" sizes="(max-width: 450px) 100vw, 450px" />

3/8″ Cartridge Heater – 5″, 500w, 240v

Cartridge Heaters

Rated 5.00 out of 5

£13.18

<img width="450" height="450" alt="" decoding="async" data-srcset="https://undercontrol.co.uk/wp-content/uploads/2019/02/cartridge-heater-5-1-450x450.jpg 450w, https://undercontrol.co.uk/wp-content/uploads/2019/02/cartridge-heater-5-1-150x150.jpg 150w" data-src="https://undercontrol.co.uk/wp-content/uploads/2019/02/cartridge-heater-5-1-450x450.jpg" data-sizes="(max-width: 450px) 100vw, 450px" class="attachment-woocommerce_thumbnail size-woocommerce_thumbnail lazyload" src="data:image/gif;base64,R0lGODlhAQABAAAAACH5BAEKAAEALAAAAAABAAEAAAICTAEAOw==" /><noscript><img width="450" height="450" src="https://undercontrol.co.uk/wp-content/uploads/2019/02/cartridge-heater-5-1-450x450.jpg" class="attachment-woocommerce_thumbnail size-woocommerce_thumbnail" alt="" decoding="async" srcset="https://undercontrol.co.uk/wp-content/uploads/2019/02/cartridge-heater-5-1-450x450.jpg 450w, https://undercontrol.co.uk/wp-content/uploads/2019/02/cartridge-heater-5-1-150x150.jpg 150w" sizes="(max-width: 450px) 100vw, 450px" />

3/8″ Cartridge Heater – 5″, 280w, 240v

Cartridge Heaters

Rated 5.00 out of 5

£13.18

<img width="450" height="450" alt="" decoding="async" data-srcset="https://undercontrol.co.uk/wp-content/uploads/2019/02/cartridge-heater-4-1-450x450.jpg 450w, https://undercontrol.co.uk/wp-content/uploads/2019/02/cartridge-heater-4-1-150x150.jpg 150w" data-src="https://undercontrol.co.uk/wp-content/uploads/2019/02/cartridge-heater-4-1-450x450.jpg" data-sizes="(max-width: 450px) 100vw, 450px" class="attachment-woocommerce_thumbnail size-woocommerce_thumbnail lazyload" src="data:image/gif;base64,R0lGODlhAQABAAAAACH5BAEKAAEALAAAAAABAAEAAAICTAEAOw==" /><noscript><img width="450" height="450" alt="" decoding="async" data-srcset="https://undercontrol.co.uk/wp-content/uploads/2019/02/cartridge-heater-4-1-450x450.jpg 450w, https://undercontrol.co.uk/wp-content/uploads/2019/02/cartridge-heater-4-1-150x150.jpg 150w" data-src="https://undercontrol.co.uk/wp-content/uploads/2019/02/cartridge-heater-4-1-450x450.jpg" data-sizes="(max-width: 450px) 100vw, 450px" class="attachment-woocommerce_thumbnail size-woocommerce_thumbnail lazyload" src="data:image/gif;base64,R0lGODlhAQABAAAAACH5BAEKAAEALAAAAAABAAEAAAICTAEAOw==" /><noscript><img width="450" height="450" alt="" decoding="async" data-srcset="https://undercontrol.co.uk/wp-content/uploads/2019/02/cartridge-heater-4-1-450x450.jpg 450w, https://undercontrol.co.uk/wp-content/uploads/2019/02/cartridge-heater-4-1-150x150.jpg 150w" data-src="https://undercontrol.co.uk/wp-content/uploads/2019/02/cartridge-heater-4-1-450x450.jpg" data-sizes="(max-width: 450px) 100vw, 450px" class="attachment-woocommerce_thumbnail size-woocommerce_thumbnail lazyload" src="data:image/gif;base64,R0lGODlhAQABAAAAACH5BAEKAAEALAAAAAABAAEAAAICTAEAOw==" /><noscript><img width="450" height="450" src="https://undercontrol.co.uk/wp-content/uploads/2019/02/cartridge-heater-4-1-450x450.jpg" class="attachment-woocommerce_thumbnail size-woocommerce_thumbnail" alt="" decoding="async" srcset="https://undercontrol.co.uk/wp-content/uploads/2019/02/cartridge-heater-4-1-450x450.jpg 450w, https://undercontrol.co.uk/wp-content/uploads/2019/02/cartridge-heater-4-1-150x150.jpg 150w" sizes="(max-width: 450px) 100vw, 450px" />

3/8″ Cartridge Heater – 4″, 500w, 240v

Cartridge Heaters

Rated 5.00 out of 5

£12.16