Water regulations for back flow into the water main.

[SMB]

Hopefully someone will be able to give me a web link to the particular regulation.

Just had a new kitchen fitted, the tap is a Brita Ceto filter tap. This type of tap is a single channel tap, ie the hot water and mains cold water mix within the spout. The instructions for the tap state that check valves should be fitted, as required by water regulations, to stop back flow of the hot water into the mains if there is a failure in the mains pressure.

The national firm, who quoted for the kitchen and fitted it, say it is not mandatory, so will not fit the valves.

Can anybody give me a web link to regulation stating that check valves MUST be fitted on single channel taps.

We had a water outage the other day, mains burst several miles away and lost water for 1/2 a day. When I turned the cold tap on you could hear air being sucked into the water mains, hence my concern.

I know that I can call in a plumber, but feel annoyed that a national firm might be flouting sensible regulations, if it is mandatory to fit them.

Many thanks,

SMB

 

[macackau]

Could have been air coming out of the tap and not going in? You could have been bleeding the air out of the pipe work. Do you have a double check valve fitted to your incoming mains? If so then you could do with out the check valves on the tap.

 

[SMB]

No check valve on incoming mains.
Definitely air being sucked in. We are one of the highest properties on this section on the mains, then it drop down to the next small village and ends.
Do the water board require a check valve (double or single) on the incoming mains pipe?

 

[macackau]

Yes. Double check valve.

 

[plumben]

Yes. Double check valve.

Thats news to me, I Had to adapt some pipework and move a water meter, the water board never mentioned that they wanted a double check valve just stop tap and full bore iso for servicing

 

[plumben]

Hopefully someone will be able to give me a web link to the particular regulation.

Just had a new kitchen fitted, the tap is a Brita Ceto filter tap. This type of tap is a single channel tap, ie the hot water and mains cold water mix within the spout. The instructions for the tap state that check valves should be fitted, as required by water regulations, to stop back flow of the hot water into the mains if there is a failure in the mains pressure.

The national firm, who quoted for the kitchen and fitted it, say it is not mandatory, so will not fit the valves.

Can anybody give me a web link to regulation stating that check valves MUST be fitted on single channel taps.

We had a water outage the other day, mains burst several miles away and lost water for 1/2 a day. When I turned the cold tap on you could hear air being sucked into the water mains, hence my concern.

I know that I can call in a plumber, but feel annoyed that a national firm might be flouting sensible regulations, if it is mandatory to fit them.

Many thanks,

SMB

If the tap is mix in the body then it should have single check valves on hot and cold supplies, although sometimes this can reduce the flow quite a bit out of the tap but should still be fitted

 

[macackau]

Thats news to me, I Had to adapt some pipework and move a water meter, the water board never mentioned that they wanted a double check valve just stop tap and full bore iso for servicing

stopcock, double check valve and drain off.

Page 4

https://www.thameswater.co.uk/tw/co...w-water-supply-regulations-guidance-notes.pdf