New boiler Vent

[Abrwstr]

Hi all,

Need some advice

We have just had a new gas heating system installed in our Housing Association bungalow,
on the outside wall near the boiler is a copper vent pipe in 15 mm copper pipe and elbows,
We had the same setup at our previous house it is for (I think ) any overflow of liquid from the boiler.

A couple of days ago my brother in law noticed this and said it should be in 22mm in case it freezes ?????? and not 15 mm.
The installation was checked by the installation engineers company, and by the HA,s
gas engineers who both issued a landlords gas safety certificate.

It has also been checked by PCM a private company employed by our landlord to check new installions , and was passed by them.
I know that my brother in law likes to think that he knows it all, (he is not a gas engineer) but someone he knows has told him.

Can someone please give us some proper advice, and not just uneducated opinions.
I will happily give any,info re the systen required.

 

[newcastle phill]

Hi. If its combi you have and the pipe is made of copper it is probably the prv safety valve outlet, should be pointing downwards.
Is so thats perfectly fine in 15mm

 

[Last Plumber]

It sounds like the Pressure relief pipe. ( safety feature ).

It comes from the Pressure relief valve and is supposed to terminate outside. Most of them on domestic boilers are in 15mm copper.

It will only release water if there is a problem.

Your relative is possibly thinking of the condensate drain. That should be in plastic not copper.

 

[SimonG]

Tell your brother in law that he's not as smart as he thinks

As LP said it will be the prv blow off.

Do you have a combi boiler?

 

[Chriswareham]

last plumber was absolutely correct ! this is a plumbers second opinion

 

[PlumbBobBob]

as above perfectly normal to be 15mm. as there is no water sitting in the pipe, there is nothing to freeze.

 

[Dotty]

As Phil says, it's the discharge pipe for the safety valve. It should not normally have water in it.

If it does drip, you've a whole other problem on your hands.

I'm afraid your brother in law is the one with the uneducated opinion.

 

[Abrwstr]

Thanks for that guys I will delight in telling the know all-know f.... all that he is wrong