Accessories for electric water heater

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More than 500 products
BEST SELLERS
Cotherm - Replacement TSE 11" T115 16A 250V Immersion Thermostat TSE00187
Cotherm - Replacement TSE 11" T115 16A 250V Immersion Thermostat TSE00187
Full star Full star Full star Full star Full star (8)
  • Free delivery (postcode specific)
£24.00
R3 ECO Electric Heating Element + With Thermostat, Timer and Remote for Towel Rails & Radiators

4 models

R3 ECO Electric Heating Element + With Thermostat, Timer and Remote for Towel Rails & Radiators
  • Free delivery (postcode specific)

£87.99
18 Litre Aquasystems ARB18 Expansion Vessel Potable 3 Bar with Integral Bracket
18 Litre Aquasystems ARB18 Expansion Vessel Potable 3 Bar with Integral Bracket
  • Free delivery (postcode specific)

£63.12

£35.99
- 42 %
Cotherm - 1 3/4" 3kW Immersion Heater 11" for Unvented Cylinders
Cotherm - 1 3/4" 3kW Immersion Heater 11" for Unvented Cylinders
  • Free delivery (postcode specific)
£33.54
24 Litre Aquasystems ARB24 Expansion Vessel Potable 3 Bar with Integral Bracket
24 Litre Aquasystems ARB24 Expansion Vessel Potable 3 Bar with Integral Bracket
Full star Full star Full star Full star Half star (9)
  • Free delivery (postcode specific)

£70.32

£38.99
- 44 %
12 Litre Varem Extravarem LC White Potable Water Expansion Vessel 3/4" Connection
12 Litre Varem Extravarem LC White Potable Water Expansion Vessel 3/4" Connection
  • Free delivery (postcode specific)

£62.33

£39.00
- 37 %
Reliance - Aquasystem ARB18 Litre Potable Expansion Vessel C/W Bracket XVES050055
Reliance - Aquasystem ARB18 Litre Potable Expansion Vessel C/W Bracket XVES050055
  • Free delivery (postcode specific)
£32.52
Heatrae Sadia - Megaflo Thermostat 11 Rod Type TSE 95612599 95612026 T115
Heatrae Sadia - Megaflo Thermostat 11 Rod Type TSE 95612599 95612026 T115
Full star Full star Full star Full star Full star (4)
  • Free delivery (postcode specific)
£24.00
Expansion vessel 12L - DIFF for Chappée : 5106287
Expansion vessel 12L - DIFF for Chappée : 5106287
Full star Full star Full star Full star Full star (1)
  • Free delivery (postcode specific)
£60.29
RM Cylinders Spare Immersion Heater
RM Cylinders Spare Immersion Heater
  • Free delivery (postcode specific)

£69.60

£50.00
- 28 %
Reliance - Aquasystem 24 Litre Potable Expansion Vessel C/W Bracket XVES050065
Reliance - Aquasystem 24 Litre Potable Expansion Vessel C/W Bracket XVES050065
  • Free delivery (postcode specific)
£35.81
Santon Spare S6212 3kw Element (Direct Models)
Santon Spare S6212 3kw Element (Direct Models)
  • Free delivery (postcode specific)

£33.47

£25.00
- 25 %
Hydraulic safety group gs1110000 - ORKLI DISTRIB. : GS1110000
Hydraulic safety group gs1110000 - ORKLI DISTRIB. : GS1110000
  •  
£22.66
24 Litre Varem Extravarem LC White Potable Water Expansion Vessel 3/4" Connection
24 Litre Varem Extravarem LC White Potable Water Expansion Vessel 3/4" Connection
  • Free delivery (postcode specific)

£86.18

£53.00
- 38 %
Range Spare TS900 Immersion Thermostat
Range Spare TS900 Immersion Thermostat
  • Free delivery (postcode specific)

£44.05

£23.99
- 45 %
Vaillant - Ecotec Expansion Vessel 181051 & PRV 178985 (Original)
VAILLANT
Vaillant - Ecotec Expansion Vessel 181051 & PRV 178985 (Original)
Full star Full star Full star Full star Empty star (2)
  • Free delivery (postcode specific)
£48.99
25 Litre Varem Extravarem LC White Potable Water Expansion Vessel 3/4" Connection
25 Litre Varem Extravarem LC White Potable Water Expansion Vessel 3/4" Connection
  • Free delivery (postcode specific)

£76.01

£48.00
- 36 %
Titan Plastech Spare UVEXPANSION12 12 Litre Potable Expansion Vessel
Titan Plastech Spare UVEXPANSION12 12 Litre Potable Expansion Vessel
  • Free delivery (postcode specific)

£75.31

£35.55
- 52 %
Immersion heater 1"1/4 type ecb3 2000w
Immersion heater 1"1/4 type ecb3 2000w
Full star Full star Full star Full star Full star (1)
  •  
£31.05
Cotherm - Combined Thermostat & Cut-Out BBSC0131
Cotherm - Combined Thermostat & Cut-Out BBSC0131
  • Free delivery (postcode specific)
£34.16
18 LTR Aquasystems ARB18 Expansion Vessel Potable 3.5 Bar with Integral Bracket
18 LTR Aquasystems ARB18 Expansion Vessel Potable 3.5 Bar with Integral Bracket
  • Free delivery (postcode specific)

£63.12

£36.99
- 41 %
Heatrae Sadia 95612599 / 95612026 Megaflo TSE/TSR Thermostat
Heatrae Sadia 95612599 / 95612026 Megaflo TSE/TSR Thermostat
Full star Full star Full star Empty star Empty star (2)
  • Free delivery (postcode specific)

£94.37

£50.00
- 47 %
5 Litre Varem Extravarem LC White Potable Water Expansion Vessel 3/4" Connection
5 Litre Varem Extravarem LC White Potable Water Expansion Vessel 3/4" Connection
  • Free delivery (postcode specific)

£54.17

£35.00
- 35 %
Redring 97783201 Spare 3kw Element & Seal
Redring 97783201 Spare 3kw Element & Seal
  • Free delivery (postcode specific)

£93.74

£51.68
- 44 %
Expansion Vessel Bracket for all Vessel sizes up to 24 Litres
Expansion Vessel Bracket for all Vessel sizes up to 24 Litres
  • Free delivery (postcode specific)

£16.48

£13.01
- 21 %
THERMOR Cozytouch Bridge - White
THERMOR
THERMOR Cozytouch Bridge - White
Full star Full star Full star Full star Half star (47)
  •  

£88.69

£82.87
- 6 %
Cotherm - 1" 3/4" 3kW Immersion Heater 14" for Unvented Cylinders
Cotherm - 1" 3/4" 3kW Immersion Heater 14" for Unvented Cylinders
  • Free delivery (postcode specific)
£39.94
Solar immersion heater tpsu0030
Solar immersion heater tpsu0030
Full star Full star Full star Full star Full star (1)
  • Free delivery (postcode specific)
£238.18
Zilmet - Ultra Pro 12 Litre Potable Expansion Vessel C/W Bracket 1100001220
ZILMET
Zilmet - Ultra Pro 12 Litre Potable Expansion Vessel C/W Bracket 1100001220
  • Free delivery (postcode specific)
£44.10
Water heater thermostat - bts 370 with 2 bulbs - COTHERM : KBTS900207
Water heater thermostat - bts 370 with 2 bulbs - COTHERM : KBTS900207
Full star Full star Full star Full star Half star (5)
  • Free delivery (postcode specific)
£67.15
Cotherm- 1" 3/4" 3kW Titanium Immersion Heater 14" for Unvented Cylinders
Cotherm- 1" 3/4" 3kW Titanium Immersion Heater 14" for Unvented Cylinders
  • Free delivery (postcode specific)
£52.29

Direct water heater buying guide

Buying guide

Direct water heater buying guide

Buying guide
MTS Ariston 65101079 Spare Thermostat
ARISTON
MTS Ariston 65101079 Spare Thermostat
Full star Full star Full star Full star Full star (1)
  • Free delivery (postcode specific)

£28.32

£23.50
- 17 %
10 Litre Varem Flatvarem Flat Heating Expansion Vessel 3/4" Connection
10 Litre Varem Flatvarem Flat Heating Expansion Vessel 3/4" Connection
  • Free delivery (postcode specific)

£57.96

£41.66
- 28 %
Baxi 5114692 Expansion Vessel 10 Litre
BAXI
Baxi 5114692 Expansion Vessel 10 Litre
  •  
£64.20
Zilmet - Ultra Pro 19 Litre Potable Expansion Vessel C/W Bracket 1100001951
ZILMET
Zilmet - Ultra Pro 19 Litre Potable Expansion Vessel C/W Bracket 1100001951
  • Free delivery (postcode specific)
£62.23
Expansion vessel 10 liters - ROCA BAXI : 141041200
Expansion vessel 10 liters - ROCA BAXI : 141041200
Full star Full star Full star Full star Full star (1)
  • Free delivery (postcode specific)
£66.92
Ariston - Europrisma 2 Litre Water Heater Expansion Vessel 15mm Check Valve Kit A
ARISTON
Ariston - Europrisma 2 Litre Water Heater Expansion Vessel 15mm Check Valve Kit A
  • Free delivery (postcode specific)
£29.99
Expansion vessel 12l - RIELLO : 4051012
RIELLO
Expansion vessel 12l - RIELLO : 4051012
  • Free delivery (postcode specific)
£73.13
Altecnic - Reflex 0.16Ltr Potable Expansion Vessel Shock Arrestor PV016C
Altecnic - Reflex 0.16Ltr Potable Expansion Vessel Shock Arrestor PV016C
  • Free delivery (postcode specific)
£22.42
AREBOS Food Preserver Mulled Wine Kettle Warmer Incl Thermostat 2500W 28L
AREBOS
AREBOS Food Preserver Mulled Wine Kettle Warmer Incl Thermostat 2500W 28L
  • Free delivery (postcode specific)
£53.90
RM Cylinders Spare Dual Thermostat
RM Cylinders Spare Dual Thermostat
Full star Full star Full star Full star Full star (2)
  • Free delivery (postcode specific)

£65.40

£21.64
- 66 %
Heatrae Sadia - Megaflo Thermostat 11 Rod Type TSE/TSR 95612026 95612599
Heatrae Sadia - Megaflo Thermostat 11 Rod Type TSE/TSR 95612026 95612599
Full star Full star Full star Full star Empty star (1)
  • Free delivery (postcode specific)

£35.84

£29.87
- 16 %
Vaillant - Ecotec Expansion Vessel 181051 (All Models)
Vaillant - Ecotec Expansion Vessel 181051 (All Models)
  • Free delivery (postcode specific)
£39.00
Heatrae Sadia Megaflo HE Lower/Bottom Immersion Heater 95606963 Complete
Heatrae Sadia Megaflo HE Lower/Bottom Immersion Heater 95606963 Complete
  • Free delivery (postcode specific)

£151.48

£88.00
- 41 %
Heatrae Sadia Megaflo/Megaflow Upper Immersion Heater - 95606962
Heatrae Sadia Megaflo/Megaflow Upper Immersion Heater - 95606962
  • Free delivery (postcode specific)

£110.57

£80.00
- 27 %
Gledhill 3kW Immersion Heater
Gledhill 3kW Immersion Heater
  • Free delivery (postcode specific)

£107.22

£57.15
- 46 %
Range - Direct 14" 3Kw Immersion Heater TS9
Range - Direct 14" 3Kw Immersion Heater TS9
  • Free delivery (postcode specific)
£35.07
18 Litre Varem Extravarem LC White Potable Water Expansion Vessel 3/4" Connection
18 Litre Varem Extravarem LC White Potable Water Expansion Vessel 3/4" Connection
Full star Full star Full star Full star Full star (1)
  • Free delivery (postcode specific)

£70.39

£44.00
- 37 %
Water heater thermostat gtlh model 1 bulb 041401 - COTHERM : GTLH041407
Water heater thermostat gtlh model 1 bulb 041401 - COTHERM : GTLH041407
  •  
£42.73
24 LTR Aquasystems ARB24 Expansion Vessel Potable 3.5 Bar with Integral Bracket
24 LTR Aquasystems ARB24 Expansion Vessel Potable 3.5 Bar with Integral Bracket
Full star Full star Full star Full star Full star (1)
  • Free delivery (postcode specific)

£70.32

£49.25
- 29 %
Expansion vessel rp 250 8 liters - DE DIETRICH : S62753
DE DIETRICH
Expansion vessel rp 250 8 liters - DE DIETRICH : S62753
Full star Full star Full star Full star Half star (10)
  • Free delivery (postcode specific)
£75.07
MTS Ariston 691216 Spare Thermostat
ARISTON
MTS Ariston 691216 Spare Thermostat
Full star Full star Full star Full star Half star (4)
  • Free delivery (postcode specific)

£21.06

£15.39
- 26 %
Water heater thermostat - bts 270 with 2 bulbs - COTHERM : KBTS 900107
Water heater thermostat - bts 270 with 2 bulbs - COTHERM : KBTS 900107
Full star Full star Full star Full star Half star (2)
  • Free delivery (postcode specific)
£62.23
Cotherm - Manual Reset Thermostat GTLHR070
Cotherm - Manual Reset Thermostat GTLHR070
  • Free delivery (postcode specific)
£56.03
OSO Hot Water Spare 80030 Surface Mounted Thermostat
OSO Hot Water Spare 80030 Surface Mounted Thermostat
Full star Full star Full star Full star Full star (1)
  • Free delivery (postcode specific)

£92.74

£60.88
- 34 %
Heating element 1200W 230V - FAGOR : 282019CNA
FAGOR
Heating element 1200W 230V - FAGOR : 282019CNA
Full star Full star Full star Full star Half star (21)
  •  
£9.31
Water heater thermostat - gpc 450 with two bulbs - COTHERM : KGPC900507
Water heater thermostat - gpc 450 with two bulbs - COTHERM : KGPC900507
  • Free delivery (postcode specific)
£136.08
Single High Limit Cut-off Thermostat for Unvented Hot Water Cylinders
Single High Limit Cut-off Thermostat for Unvented Hot Water Cylinders
  • Free delivery (postcode specific)

£36.24

£30.42
- 16 %
Expansion vessel rn8 + support - DE DIETRICH : 200004160
DE DIETRICH
Expansion vessel rn8 + support - DE DIETRICH : 200004160
  • Free delivery (postcode specific)
£101.74
Hotun Hiflo 15mm x 32mm Odour Seal Dry Trap Tundish HHW100C - White
Hotun Hiflo 15mm x 32mm Odour Seal Dry Trap Tundish HHW100C - White
  • Free delivery (postcode specific)
£27.19

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