I am installing a new bath and shower in my bathroom and will eventually also be creating a new ensuite wetroom with wc, shower and wash basin. I intend doing all the pipework myself with speedfit. Can someone please fill me in exactly what valves I have to install by law on the supplies to all of these? i.e single check, double check, service valves? Thanks
water regs - check valves and service valves
- Thread starter larold
- Start date
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if its new build you should call your local authority if an exisiting house dont worry
single check valves for shower supplies, service valves on WC, wash basin, shower, bath and inlet to combi boiler
stopvalves for outlets of cold storage tanks & inlet of hot cylinder
double check valve on incoming main immediately after stopcock and a drain off valve at lowest point of cold and hot services
these are the basic requirements of our local water board
stopvalves for outlets of cold storage tanks & inlet of hot cylinder
double check valve on incoming main immediately after stopcock and a drain off valve at lowest point of cold and hot services
these are the basic requirements of our local water board
for a full guide try this book
WRAS water regulations guide ISBN 0-9539708-0-9
WRAS water regulations guide ISBN 0-9539708-0-9
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Nit-picking, this
There are some additional frequent hiccups eg:
The first valve into the property should be a screw-down not quarter turn type.
Shower heads mustn't be able to dangle in the bath, and "moslem" sanitary sprays are almost impossible to install legally.
...would be two valves in series. One will do.
There are some additional frequent hiccups eg:
The first valve into the property should be a screw-down not quarter turn type.
Shower heads mustn't be able to dangle in the bath, and "moslem" sanitary sprays are almost impossible to install legally.
yes but do you really like climbing in & out of loft?
yes that is correct, a gate type is not accepted.
the way to comply with this is to fiit a shower check valve at the wall end of the hose (a small 1" fitting with a check valve inside it) this is accepted by B'mouth & west Hants and Southern Water locally
Some of you guys need to catch up with the regs. 
At the point of entry, a full flow lever valve is perfectly acceptable, together with a drain point, a check valve is not needed in order to comply with the regs.
Backflow prevention must be at point of use.
Ask a dinasaur if ya want a know anything.
At the point of entry, a full flow lever valve is perfectly acceptable, together with a drain point, a check valve is not needed in order to comply with the regs.
Backflow prevention must be at point of use.
Ask a dinasaur if ya want a know anything.
i thought a TMV was required on bath and bidet upgrades since 2006
on new builds
Bidets are special fittings with lots of regs.
Separate supplies from the tank and cylinder being one.
round here the water board insist on a check valve after the main stopcock!!
they don't here and its 3/4 NPT before the meter
great for filling the pool
great for filling the pool
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