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Discuss double check valve requirements for incoming mains. in the Plumbing Jobs | The Job-board area at PlumbersForums.net

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GasonSea

Gas Engineer
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Hi all,
current job to replace old lead incoming mains for 25mm poly pipe, from the meter in front garden to kitchen at back of house, 3 bed semi with a combi boiler,
!question! do I need to include a double check valve on the incoming mains water valve arrangement.
many thanks
 
your meter will act as a non return valve, but you will require a small expansion vessel (150ml) to take up thermal expansion
 
No Tom you don't need one,
With all due respect if you are going to start messing around with water / water mains you really do need to do the Water Reg's course, then you be able to self cert & know what is & isn't required.
 
Yes true, it's a one off job I don't normally touch domestic, but didn't want to install incorrectly, think I'll pass this one off to a local plumber then.
Thanks guys
 
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