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Andrew Smith
Andrew Smith, Engineer
Category: UK Plumbing
Satisfied Customers: 3591
Experience:  Domestic Gas, Commercial Gas, LPG, Unvented Hot Water, Part P Electrical, Commercial Catering
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I need to replace a leaking double check stop valve on my

Customer Question

I need to replace a leaking double check stop valve on my filling loop. Potterton Performa 24. Do i need to turn off the mains water and drain the entire system, or can i isolate at source?
Submitted: 2 months ago.
Category: UK Plumbing
Expert:  Andrew Smith replied 2 months ago.

If there is a valve at the boiler end then turn it off and turn off your mains cold water while you do it.

If there is a valve at both ends then the one before the double check valve should isolate the valve so you don't have to turn off your mains

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