Hot Water Cylinder Accessories

Keep your hot water system running at its best with our range of high-quality hot water cylinder accessories. Whether you’re upgrading an existing setup or completing a new installation, having the right components in place is essential for efficiency, safety, and long-term performance. Our carefully selected range includes dependable immersion heaters and durable expansion vessels designed to meet the demands of both trade professionals and DIY installers. Immersion heaters provide a reliable, on-demand hot water solution, making them an essential backup or primary heat source for many systems. Our selection includes models built for fast heat-up times, consistent performance, and long service life. With options suitable for a variety of cylinder types and sizes, you can find the right fit to ensure your system delivers hot water exactly when you need it. Built with robust materials and designed for straightforward installation, these heaters offer a practical and cost-effective way to maintain comfort and convenience. Expansion vessels play a critical role in protecting your hot water system. By managing pressure fluctuations as water heats and expands, they help prevent damage, reduce strain on components, and extend the lifespan of your cylinder. Our range includes high-performance vessels engineered for reliability and compliance with industry standards. Easy to install and built to withstand demanding conditions, they provide peace of mind that your system is operating safely and efficiently. Every product in our hot water cylinder accessories range is chosen with quality and durability in mind. We understand that whether you’re on-site or working at home, you need components you can trust to perform without compromise. That’s why we offer solutions from trusted manufacturers, ensuring consistent results and long-term value. From essential replacements to system upgrades, our accessories are designed to help you get the job done right first time. With competitive pricing, clear product information, and reliable availability, it’s never been easier to source the parts you need.

Upgrade your hot water system today with accessories that deliver on performance, reliability, and value — because when it comes to hot water, every component matters.

 
 
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121 results
heatrae-sadia-27-3kw-superloy-800-immersion-heater-stat

Heatrae Sadia 27" 3kW Superloy 800 Immersion Heater & Stat - 95110905R

£89.71 inc
VAT
Save £4.61 | Was £94.32
altecnic-reflex-potable-expansion-vessels-with-legs

Altecnic Reflex 500L Potable Expansion Vessel With Legs - PV500W

More Options Available
£779.74 inc
VAT
214-mechanical-flange-with-washer

2.1/4" Mechanical Flange With Washer - 10099311

£19.69 inc
VAT
Save £2.95 | Was £22.64
altecnic-reflex-potable-expansion-vessels-with-legs

Altecnic Reflex 50L Potable Expansion Vessel With Legs - PV50W

More Options Available
£185.93 inc
VAT
Save £18.90 | Was £204.83
altecnic-robokit-extra-expansion-vessels-with-legs

Altecnic Reflex 35L Robokit Extra Expansion Vessel With Legs - CA-900035

More Options Available
£220.75 inc
VAT
34-x-22mm-warix-flange

3/4" x 22mm Warix Flange - 10099320

£36.64 inc
VAT
altecnic-reflex-heating-expansion-vessels-with-legs

Altecnic Reflex 35L Heating Expansion Vessel With Legs

More Options Available
£99.79 inc
VAT
zilmet-cal-pro-heating-expansion-vessels

Zilmet CAL-PRO 18L Heating Expansion Vessel - 1300001800

More Options Available
£49.09 inc
VAT
Save £9.76 | Was £58.85
altecnic-robokit-extra-expansion-vessels

Altecnic Reflex 24L Robokit Extra Expansion Vessel - CA-900024

£100.30 inc
VAT
Save £11.18 | Was £111.48
heatrae-sadia-titanium-immersion-heater-27-3kw-thermostat

Heatrae Sadia Titanium Immersion Heater 27" 3KW & Thermostat - 95110401R

£125.71 inc
VAT
Save £13.68 | Was £139.39
1-flat-curved-essex-flange

1" Flat / Curved Essex Flange - 10099372

£85.33 inc
VAT
tesla-18-incoloy-immersion-heater-and-thermostat

Tesla 18' Incoloy Immersion Heater and Thermostat - TIH647

£22.84 inc
VAT
Save £2.33 | Was £25.17
altecnic-reflex-potable-expansion-vessels

Altecnic Reflex 18L Potable Expansion Vessel - PV18W

More Options Available
£59.40 inc
VAT
Save £5.34 | Was £64.74
altecnic-reflex-heating-expansion-vessels-with-legs

Altecnic Reflex 100L Heating Expansion Vessel With Legs - HV100C

More Options Available
£274.77 inc
VAT
Save £44.48 | Was £319.25
altecnic-reflex-heating-expansion-vessels-with-legs

Altecnic Reflex 50L Heating Expansion Vessel With Legs

More Options Available
£101.44 inc
VAT
Save £10.55 | Was £111.99
22mm-x-1-male-x-34-female-surrey-flange

22mm x 1" Male x 3/4" Female Surrey Flange - 10099345

£50.98 inc
VAT
Save £23.55 | Was £74.53
tesla-incoloy-copper-14-immersion-heater-and-thermostat-tih545

Tesla Incoloy Copper 14" Immersion Heater and Thermostat - TIH545

More Options Available
£25.71 inc
VAT
Save £1.72 | Was £27.43
tesla-27-incoloy-immersion-heater-and-thermostat

Tesla 27' Incoloy Immersion Heater and Thermostat - TIH650

£32.10 inc
VAT
Save £3.96 | Was £36.06
altecnic-reflex-heating-expansion-vessels-with-legs

Altecnic Reflex 80L Heating Expansion Vessel With Legs - HV80C

More Options Available
£172.45 inc
VAT
altecnic-sealed-system-kits

Altecnic 1/2 Sealed System Kit - CA-900000

More Options Available
£85.74 inc
VAT
Save £7.69 | Was £93.43
altecnic-potable-vessel-brackets

Altecnic Potable Vessel Bracket (5-18L) - RS-MB2

More Options Available
£28.20 inc
VAT
ariston-water-heater-kit-c-discharge-tundish

Ariston Water Heater Kit C - Discharge tundish - 406807

£15.49 inc
VAT
Save £8.62 | Was £24.11
tesla-incoloy-copper-11-immersion-heater-and-thermostat-tih540

Tesla Incoloy Copper 11" Immersion Heater and Thermostat - TIH540

More Options Available
£23.82 inc
VAT
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