Also known as a membrane, it is a boiler part that is normally located within the diverter valve or hydraulic section of the combination boiler. Its main purpose is to move a pin that then operates a microswitch which in turn sends a signal to the printed circuit board. The signal is normally to indicate the pump is running or there is a demand for hot water. They are sometimes also referred to as the pump proving – flow diaphragm or the domestic hot water DHW diaphragm, having this feature is what makes a combi boiler so popular due to the fact the boiler can provide hot water and heating without the need for a cylinder.

Products

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Heatline Diaphragm,gas valve,Premix,5,40 mm,red D003201061

Part: D003201061

Price: £6.24
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Worcester Differential Valve Rubber Diaphragm 87167375550

Part: 87167375550

Price: £6.55
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Main Burner Diaphragm 998437

Part: 998437

Price: £73.41
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Ariston Membrane 65102719

Part: 65102719

Price: £17.96
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Ariston Membrane 999962

Part: 999962

Price: £3.96
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Chaffoteaux Diaphragms 60001364

Part: 60001364

Price: £37.80
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Chaffoteaux Diaphragm 65105928

Part: 65105928

Price: £8.76
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Chaffoteaux - Gas Diaphragm D: 4.0 Mm - 65116891

Part: 65116891

Price: £4.35
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Ariston Valve Gas Diaphragm (D=4.5) 65100243

Part: 65100243

Price: £5.80
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Vokera 0870 Diaphragm

Part: 0870

Price: £3.45
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Baxi Burner Diaphragm 80Kw- 669795

Part: 669795

Price: £12.87
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Halstead Diaphragm R10020265

Part: R10020265

Price: £15.13
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Worcester Diaphragm 87167419500

Part: 87167419500

Price: £6.55
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Ariston Diaphragm 12035097

Part: 12035097

Price: £4.35
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Ariston Diaphragm 65103353

Part: 65103353

Price: £4.35
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Diaphragm 65102196

Part: 65102196

Price: £3.96
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Chaffoteaux Diaphragm 60022171-10

Part: 60022171-10

Price: £4.37
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Chaffoteaux Diaphragm 65105929

Part: 65105929

Price: £13.51
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Chaffoteaux - Gas Diaphragm D: 4.7 Mm - 65116892

Part: 65116892

Price: £4.35
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Ariston Bearing Plate 61400058

Part: 61400058

Price: £4.35
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Potterton Diaphragm Assembly 10/13561

Part: 10/13561

Price: £160.14
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Baxi Burner Diaphragm 988612

Part: 988612

Price: £14.22
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Halstead Diaphragm R10027161

Part: R10027161

Price: £24.44
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Worcester Service Set 87199283250

Part: 87199283250

Price: £8.58
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