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No not new pipe work. I had the whole system cleaned by a guy specialising in power flushing, that's all he did. He forward and reverse power flushed to remove the debris that had collected in the radiators and the pipe work. All rads where individually disconnected and power flushed. This was after the whole system had been flushed through. The process took five hours from start to finish.
 
In retrospect I probably should have gone for a new boiler, maybe a Valliant. I had checked spares availability for the Puma range before making my decision and was told the heat exchanger for the Puma 100 had been discontinued, but all parts were still available for the 80. However that was 2 years ago.
 
It’s amazing how quick things change but if your boiler is in good working order then I keep everything crossed for you that you don’t require any further repairs any time soon. Anyway keep us updated as to how you resolve the bypass issue
 
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I am surprised "well maintained" and "British Gas" cropped up in the same sentence,TBH.

And, to be pedantic, the filling loop NRV should be on the Cold mains side.
 
Not doubting you but why??? It always made sense to me when there are two taps but in the instance where it’s tap hose nrv it makes sense because you’d never be able to remove the hose correctly
 
Not doubting you but why??? It always made sense to me when there are two taps but in the instance where it’s tap hose nrv it makes sense because you’d never be able to remove the hose correctly

It was my understanding that you required two taps by regs anyway?

You can see why you have the NRV on the cold, as it's less of a dead leg.
 
But there’s no dead leg because the hose should be removed, alright maybe mm in it but seriously.
 
But there’s no dead leg because the hose should be removed
Should be. But how many customers actually remove it though.

Also if you're only fitting a tap on one side and just a NRV on the other I wouldn't be removing the link.
 
No but I’m arguing regs if you say there should be two taps then the hose should also be removed. Sorry I’m not being pedantic I’m genuinely querying. I cannot see what difference it makes what the reasoning is for the nrv on cold
 
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No but I’m arguing regs if you say there should be two taps then the hose should also be removed. Sorry I’m not being pedantic I’m genuinely querying. I cannot see what difference it makes what the reasoning is for the nrv on cold
I wasn't disputing the fact that the hose shouldn't be removed, I was just simply stating that hardly anyone actually removes the link.

I thought there was some reg about the NRV on the filling loop, but I can't find it to hand. Years ago, it was as you say NRV on the heating side. Then about 10 years ago I thought they changed it and required the NRV to be on the cold main. Incase someone left the filling loop open on the cold side and the dead leg within the loop.

Even if it isn't a reg about it, isn't it better practice for it to be on the Cold? You remove the dead leg (If one is created by the customer), plus you can drain the boiler easily when recharging the expansion vessel or maintenance 😛.

Two taps - at least if one is passing you have a fail safe on your second tap.
 
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Oh I totally agree with two taps don’t get me wrong but to me it’s logical to stop the heat at the return end so there is no inadvertent heating of the cold side. I cannot see where a dead leg occurs if there is no hose though.
 
Oh I totally agree with two taps don’t get me wrong but to me it’s logical to stop the heat at the return end so there is no inadvertent heating of the cold side. I cannot see where a dead leg occurs if there is no hose though.
You're right, there isn't one when the hose has been removed. But my point kind of was, no one ever removes the hose.
 
Sorry to sound blunt but your title is immediately accusatory. If in fact it was a builder or a plumber that worked on the boiler and not a gas safe engineer then I’m afraid the fault lies with you

Why do you need to be gas safe to fit a zone valve?
 
Thanks Riley, the only problem I now have is, the extension build is new and I have not signed off on the builder's snagging list. So a small final payment is due. I don't know whether I should trust him to put it right or to call in a known good plumber to rectify his work. 😵

Legally the original contractor is entitled to be given reasonable opportunity to put the situation right. You’re well within your rights to insist the work is undertaken by a competent person. Sounds very like you have the experience to decide for yourself if the guy is flanneling you.
 
Legally the original contractor is entitled to be given reasonable opportunity to put the situation right. You’re well within your rights to insist the work is undertaken by a competent person. Sounds very like you have the experience to decide for yourself if the guy is flanneling you.
As you say however you are well within your rights also to refuse access if you feel they have acted outside scope or unlawfully
 

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