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https://www.askthetrades.co.uk/cgi-bin/yabb/YaBB.pl DIY Forum >> Plumbing Questions >> Position of pressure relief pipework https://www.askthetrades.co.uk/cgi-bin/yabb/YaBB.pl?num=1125229363 Message started by hendrix on Aug 28^th, 2005, 12:42pm

Title: Position of pressure relief pipework
Post by hendrix on Aug 28^th, 2005, 12:42pm

Does the pressure relief/discharge pipework have to go outside?. I am thinking of putting a system boiler upstairs and dont want a pipe down the middle of the outside wall.

Title: Re: Position of pressure relief pipework
Post by thescruff on Aug 28^th, 2005, 1:52pm

Yes it does, unless you discharge it on the floor.

You can turn it back to the wall at high level provided it's not a danger to life.

Title: Re: Position of pressure relief pipework
Post by billythekid on Aug 28^th, 2005, 4:22pm

most installers round here are doing that, two elbows on the outside wall

╔| |═══ <-- From boiler
╚| |<--wall

btk

Title: Re: Position of pressure relief pipework
Post by billythekid on Aug 28^th, 2005, 10:22pm

scruff, are you allowed to send it to waste via a tundish?? can't remember myself, I dont touch heating stuff usually so forget it all quickly! lol

btk

Title: Re: Position of pressure relief pipework
Post by thescruff on Aug 28^th, 2005, 11:06pm

wrote on Aug 28^th, 2005, 10:22pm:

scruff, are you allowed to send it to waste via a tundish?? can't remember myself, I dont touch heating stuff usually so forget it all quickly! lol

btk

Not a good idea to stick boiling water down a plastic waste, but have seen it done.

But lets just say you shouldn't ;D and I wouldn't advise it.

Title: Re: Position of pressure relief pipework
Post by Lurch on Aug 29^th, 2005, 12:03am

Hasn't the question been misread here? I took it as hendrix wants to run it to the outside but through the inside frst to save running it vertically down the outside wall of the house? Or shall I just shut up?

Title: Re: Position of pressure relief pipework
Post by hendrix on Aug 29^th, 2005, 10:35am

Yes I was considering running the pipe inside, down a long and difficult route, just to keep it out of sight, was not sure of any max length restrictions, but was looking for some alternatives.
I was hoping I could go dirrect into the 4" soil pipe, the vent part that goes up to the roof, as this is close by. Although the water is boiling, it will not normally be in use and then only for a short period, I would have thought this safer than venting anywhere outside.

Title: Re: Position of pressure relief pipework
Post by billythekid on Aug 29^th, 2005, 12:23pm

the main safety thing is that your boiler is overheating, if its going straight to waste you cant see that, running down the wall you would, and by the time it got low enough to scald it would be cool.

btk