Outside tap isolator

[RF Lighting]

I am going to be fitting an outside tap, and was wondering what sort of isolator would be best to use to turn the tap off from inside during the depths of winter, or in the event of a burst pipe or failed joint.

I presume the choice is between an isolating valve

and a traditional stop cock.

Which would be best suited to this application?

Ta in advance

 

[Softus]

I tend to prefer these for the application in question:

because they're (a) full bore and (b) quick and easy to operate.

 

[RF Lighting]

Cheers Softus, lever valve it is

 

[gas4you]

Don't forget the non-return valve in the cold supply pipe!

 

[JohnD]

OOI, is there any difference in reliability/likely to jam or fail after years of disuse?

 

[RF Lighting]

Don't forget the non-return valve in the cold supply pipe!

I presume I can just use an external tap with a built in double check valve


http://www.screwfix.com/app/sfd/cat/pro.jsp?cId=100121&ts=66160&id=11958

 

[gas4you]

I thought so but recently other experts on here now state that this is not allowed due to water regs and that it has to be a seperate valve. I do noy know personally.

Boxbasher might be able to inform us better

 

[BoxBasher]

I thought so but recently other experts on here now state that this is not allowed due to water regs and that it has to be a seperate valve. I do noy know personally.

Boxbasher might be able to inform us better

Have a peek at this post

Bib taps incorporating check valves are for retro-fit. New installations require a servicing valve and double check valve inside (which is better as there are less freezable/breakable bits outside)

 

[gas4you]

Cheers boxbasher

 

[RF Lighting]

Wow, never new that. It's amazing what you learn on this here forum


Is there such a thing as a combined isolater and check valve?


Thanks to all for the pointers

 

[Softus]

Is there such a thing as a combined isolater and check valve?

No.

Thanks to all for the pointers

Here's another one:

 

[RF Lighting]

I got the tap done today, and just to prove that your advice is not wasted on these forums, here is the lever valve Softus recommended, and the internal double check valve.

 

[Softus]

Good for you RF. And is that 6mm bonding I see before me?

 

[gas4you]

Good for you RF. And is that 6mm bonding I see before me?

Dont forget that out side taps MUST be isolated from any internal earth bonnding as they are outside the equipotential zone Easiest way is to fit a plastic coupling as near the wall as poss.

 

[Softus]

Dont forget that out side taps MUST be isolated from any internal earth bonnding as they are outside the equipotential zone Easiest way is to fit a plastic coupling as near the wall as poss.

This doesn't quite make sense to me - what's the difference between an incoming gas, or mains water, pipe and the pipe 'from' the outside tap?