PRV question ..................

[Robert Tyrrell]

Just a quick one really - I've noticed a couple of the boilers I've been servicing have the pipe from the PRV running in 15mm copper for a short run and then they exit into a 32mm plastic waste pipe. I've also seen this on a new installation as well.
I thought that it had to be in copper all the way - or am I wrong?

 

[ShaunCorbs]

Needs to be pushfit waste pipe and trapped

Also need a tundish on the prv pipe out the boiler

 

[Robert Tyrrell]

Needs to be pushfit waste pipe and trapped

Also need a tundish on the prv pipe out the boiler

Why push fit? does it have a higher temperature tolerance?

 

[ShaunCorbs]

Why push fit? does it have a higher temperature tolerance?

Yes can take 95 dc for a while

 

[Robert Tyrrell]

Yes can take 95 dc for a while

So does that mean that solvent weld waste pipe has a lower tolerance, and if so how would anyone know which pipe has been used once it's installed?

 

[ShaunCorbs]

So does that mean that solvent weld waste pipe has a lower tolerance, and if so how would anyone know which pipe has been used once it's installed?

Yes correct and you need to stub it above so you can tell

 

[king of pipes]

As above use push fit and hepvo trap or similar tundish at the boiler . kop