Also known as a membrane, it is a boiler part that is normally located within the diverter valve or hydraulic section of the Chaffoteaux boiler. Its main purpose is to move a pin that then operates a micro switch 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 referred to as the pump proving ? flow diaphragm or the domestic hot water DHW diaphragm.
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Chaffoteaux 61301782 Diaphragm

Part: 61301782

Price: £7.63
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Chaffoteaux 60010419 Diaphragm

Part: 60010419

Price: £3.96
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Chaffoteaux 60100605-30 Corvec Maxiflame Diaphragm Repair Kit

Part: 60100605-30

Price: £19.31
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Chaffoteaux 60081977 Diaphragm

Part: 60081977

Price: £16.49
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Chaffoteaux 60100506-30 Celtic Repair Kit

Part: 60100506-30

Price: £42.66
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Chaffoteaux 571446 Domestic Hot Water (DHW) Diaphragm

Part: 571446

Price: £20.97
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Chaffoteaux 571441 Pressure Switch

Part: 571441

Price: £26.99
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Chaffoteaux 571547 Diaphragm

Part: 571547

Price: £4.00
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Chaffoteaux 60025809-30 Diaphragm

Part: 60025809-30

Price: £6.63
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Chaffoteaux 60032664 Diaphragm

Part: 60032664

Price: £10.49
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Chaffoteaux 60019016-10 Diaphragm

Part: 60019016-10

Price: £12.00
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Chaffoteaux 60100142-20 Britony 2 Diaphragm Repair Kit

Part: 60100142-20

Price: £15.37
614002778
Chaffoteaux Diaphragm 61400278

Part: 61400278

Price: £11.67