Leaking stop valve

[sharedarchitect]

I've replaced the lead mains water supply pipe to my property with in preparation for a new 32mm supply from Thames Water

The 32mm HDPE supply with brass stopcock within the curtilage of the house was supplied and fitted by my builder and has been inspected and approved by Thames Water

However, there is a leak which my builder says he cannot fix as this is caused by Thames Water insistence on a brass stopcock rather than a thermoplastic

Thames Water did indeed insits on brass - stating a British Standard BS1010 or European EN1213

Surely Brass to HDPE must be possible or Thames water wouldn't insist. Is it possible my builder is not using the right valve connections, appropriate washers or some such thing?

Alternatively are plastic stop cocks available to the above standards?

Would appreciate any advice

 

[glenno1]

Cant see no reason why brass cant be used.It may just need nipping up with a spanner

 

[sharedarchitect]

Cant see no reason why brass cant be used.It may just need nipping up with a spanner

Thanks, they seem to have tried that but still leaking - do you think they need to take it off and re-fit with PTFE

 

[JCplumb]

The olives should easily cut into the plastic and quickly create a watertight seal, some ptfe may help but isn't needed on compression fittings. I'd undo the compressions and inspect them to see why it's passing. If it has brass olives I'd switch them for copper ones.

 

[Whn1]

Is there an insert in the poly?


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[sharedarchitect]

Ok thanks guys. I really appreciate your comments this gives me something to go back with and at least ask a few 'intelligent' questions.

 

[aqualogic7]

wras approved UGSTV in line stop valve from john guest ltd

 

[PlumbBobBob]

Is there an insert in the poly?

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that's what i was wondering.

 

[glenno1]

Shouldnt need ptfe,is the pipe cut squarely

 

[sharedarchitect]

John Guest thermoplastic valve is WRAS approved but not certified to BS2010 or EN1213 - so on that basis in theory Thames Water wont accept it. Which seems harsh / daft. I've dropped an e-mail to clarify them but it takes an age to get any thing back from these people

In themeantime I'll see if we can't get the existing brass fitting to work based on your comments

Cheers All