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.

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Alpha 6.1000801 Diaphragm

Part: 6.1000801

Price: £8.00
AK1033_500x500
Alpha 6.1000765 Diaphragm Repair Kit

Part: 6.1000765

Price: £11.00
AK1037_500x500
Alpha 3.013389 Domestic Hot Water (DHW) Diaphragm

Part: 3.013389

Price: £20.00
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Alpha 6.5405330 Domestic Hot Water (DHW) Diaphragm

Part: 6.5405330

Price: £11.69
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Alpha 6.5405320 Primary Flow Diaphragm

Part: 6.5405320

Price: £7.62
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Baxi 5111140 Combi Instant Repair Kit Diaphragm

Part: 5111140

Price: £7.95
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Baxi 5111139 Combi Instant (CH) Repair Kit Diaphragm

Part: 5111139

Price: £7.95
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Baxi 5111138 Combi 105He (CH) Repair Kit Diaphragm

Part: 5111138

Price: £8.95
AK1033_500x5005
Baxi 5111137 DHW Diaphragm Kit

Part: 5111137

Price: £8.95
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Baxi 248838 Combi Instant (DHW) Diaphragm

Part: 248838

Price: £9.57
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Baxi 248619 Combi Instant Flow (CH) Diaphragm

Part: 248619

Price: £6.95
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Baxi 248066 Combi (DHW) Diaphragm

Part: 248066

Price: £6.95
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Baxi 248065 Combi (CH) Diaphragm

Part: 248065

Price: £9.78
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Baxi 10/17549 Diaphragm

Part: 10/17549

Price: £8.05
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Potterton Performa 24I He Diaphragm Replacement Kit DHW 5111140

Part: 5111140

Price: £7.95
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Potterton Performa 24i He Diaphragm Kit 5111139

Part: 5111139

Price: £7.95
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Potterton Performa Diaphragm Replacement Kit 5111138

Part: 5111138

Price: £8.95
AK1033_500x5006
Potterton Diaphragm Repair Kit 5111137

Part: 5111137

Price: £8.95
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Potterton Performa 24i He, 28i Diaphragm Dhw 248838

Part: 248838

Price: £9.57
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Potterton Performa Diaphragm 248619

Part: 248619

Price: £6.95
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Potterton Performa Dhw Diaphragm 248066

Part: 248066

Price: £6.95
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Potterton Perfoma Diaphragm 248065

Part: 248065

Price: £9.78
6281540
Sime Diaphragm Kit 6281540

Part: 6281540

Price: £43.95
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Sime 6153101 Diaphragm

Part: 6153101

Price: £17.95
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Ravenheat 5012051 Diverter Valve Diaphragm

Part: 5012051

Price: £19.95
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Chaffoteaux 60100506-30 Celtic Repair Kit

Part: 60100506-30

Price: £42.66
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Chaffoteaux 60100605-30 Corvec Maxiflame Diaphragm Repair Kit

Part: 60100605-30

Price: £19.93
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Chaffoteaux 60100142-20 Britony 2 Diaphragm Repair Kit

Part: 60100142-20

Price: £29.95
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Chaffoteaux 571441 Pressure Switch

Part: 571441

Price: £19.67
614002778
Chaffoteaux Diaphragm 61400278

Part: 61400278

Price: £14.51
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Chaffoteaux 61301782 Diaphragm

Part: 61301782

Price: £7.05
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Chaffoteaux 60081977 Diaphragm

Part: 60081977

Price: £14.17
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Chaffoteaux 60025809-30 Diaphragm

Part: 60025809-30

Price: £8.15
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Chaffoteaux 60019016-10 Diaphragm

Part: 60019016-10

Price: £12.00
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Chaffoteaux 60010419 Diaphragm

Part: 60010419

Price: £4.35
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Chaffoteaux 571547 Diaphragm

Part: 571547

Price: £5.95
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Chaffoteaux 571446 Domestic Hot Water (DHW) Diaphragm

Part: 571446

Price: £16.53
AK1070_500x500
Vokera 4298 Flow Switch Diaphragm

Part: 4298

Price: £6.04
AK1068_500x500
Vokera 3611 Domestic Hot Water (DHW) Diaphragm

Part: 3611

Price: £7.45
0714
Vokera 0714 Diaphragm

Part: 0714

Price: £4.95
0557
Vokera 0557 Flow Switch Diaphragm

Part: 0557

Price: £6.13
0226
Vokera 0226 Domestic Hot Water (DHW) Diaphragm

Part: 0226

Price: £7.43
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Biasi BI1011114 Pressure Disc (DHW)

Part: BI1011114

Price: £13.65
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Biasi BI1011111 Pressure Switch Disc (CH)

Part: BI1011111

Price: £8.71
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Biasi BI1011103 Central Heating (CH) Diaphragm

Part: BI1011103

Price: £5.95
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Biasi BI1011102 Domestic Hot Water (DHW) Diaphragm

Part: BI1011102

Price: £6.95
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Ariston 570720 Service Kit

Part: 570720

Price: £24.41
60100142-20
Ariston - Water Section Repair Kit - 60100142-20

Part: 60100142-20

Price: £29.95
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Ariston 60034118 Bearing Ring

Part: 60034118

Price: £7.04
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Ariston 571441 Ecogenus CH Service Kit For Pressure Switch

Part: 571441

Price: £19.67
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