Polyplumb - Cold Water Only?

[Ads17]

I bought a Polyplumb Double Check Valve to put on my Hot Water supply to my bath mixer tap. The website I bought it off says that it is "Not for Central Heating", which it isn't. The packaging that it came in says "Cold Water Only".

Other Websites that sell the same product only have a general Polyplumb blurb about being for both Hot & Cold water supply.

So should I put this on the Hot Water supply or will it fail and why?

 

[Agile]

I suggest you ask the makers and then if it fails you can blame them if they have said its OK for hot water.

Most of these plastic fittings are suitable for water up to 80 C as long as th pressure is not too high.

Many people don't realise just how low the rated pressure becomes when they are hot!

Most info is here!

http://www.polypipe.com/cms/toolbox...olyplumb_and_Polyfit_Barrier_Pipe_Systems.pdf

Tony

 

[Madrab]

I can only think that due to the way the polyplumb double check valve works (the plastic valve system) and the material it's made from that they cannot guarantee it's viability when used with hot water.
Even JG Speedfit ( the best push fit IMO) only guarantee their push fit check valves for intermittent hot water at 65Deg at a reduced pressure rate. If it's got to be a push fit and PP won't guarantee theirs then it would be one of these I'd suggest using.
That being said I would recommend using a normal brass compression fitting check valve to be sure.