Stop tap requirements

[johno12345]

Hi,

does anyone know the requirements or know a link to the requirements that the main stop tap needs to meet, non-return valves etc?

I have had a look but cant find anything official

thanks

 

[muggles]

AFAIK it just needs to be a WRAS-approved fitting suitable for high pressure systems that can be shut off without using tools...so if you want to use a full-bore lever valve, for example, you can

 

[Charnwood]

Surestop now do a WRAS approved 'switchable' stop cock.

 

[johno12345]

well, i have a pegler full bore lever valve and the water board said its illegal and needs a non-return valve, thats why I thought it was a bit odd, the outside tap has got a non-return, was always under the impression that outside taps needed them but not much else.

 

[swbjackson]

Lots of things need non return valves. It depends on your property as to whether a double check valve is required or not. A flat with a shared rising main will require a double check valve.

Some water inspectors can be over zealous with regard to the provision of backflow prevention.

 

[johno12345]

I cant think of anything that should need it, no bath, just a shower, basin, toilet, kitchen sink washing machine and dishwasher

cobmi boiler so no stored water anywhere

i dont mind fitting one, but dont want to reduce the flow, which was the reason for fitting the full bore jobbie in the first place

 

[mfarrow]

He's right because a full-bore valve fails the requirements of a particular British Standard. I forget which now, but if you do a search it will come up. Nothing to do with it needing a non-return valve though.

 

[swbjackson]

AS long s the full bore valve is WRAS approved there's now no problem fitting them.

 

[Charnwood]

He's right because a full-bore valve fails the requirements of a particular British Standard.

Possibly BS1010. I'm sure it states that a stop cock has to be a certain length so that any BS1010 stop cock can be replaced by any other brand without removing the nuts and olives from the pipework.

 

[mfarrow]

The following is from BS6700:1987 Design, installation, testing and maintenance of services supplying water for domestic use within buildings and their curtilages

View media item 50196
IIRC all the above standards in the table are for screw-down stopvalves. The standard does need updating IMHO.

EDIT: The standard has been updated. BS6700:2006+A1:2009 is the latest version. It still has the same table as above, though.

 

[johno12345]

this is the valve in question http://www.pegleryorkshire.co.uk/EN...&Rid=e4841a07-fde8-485a-8724-5fe0bd419bb3&d=0

i think screw down valves are a bit old fashioned and take them out where i can