PEX for Base board hot water

JOE_99

I want to use Pex with oxygen barrier in my BBHW system and some copper.What type of PEX should I use.I'm not sure yet if I will use 180 or 150 degree water.Can you use PEX at the higher temp.Have only seen Pex rated at 200 degrees.

Mitch_5

pex ratings

are temperature and pressure related.

We have been using pex for almost 15 years on heat and have only had two problems.

One was a boiler that ran away (electrician wired it wrong) and the safety did not go off so the pex melted and acted as a pressure relief.

The other is the change by one manufacture from metric to standard eliminating availability of fittings for a retro fit. Same can be said for incompatibility of some rare brands.

Veiga pextron and fosta pex work great.

Mitch S.

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hot_rod

Pex is commonly used

for HWBB. I'd also suggest a PAP or the Viega FostaPex. Crunch the load numbers, often times 5/8" diameter is plenty to handle most zones. Much much easier to handle opposed to 3/4".

hot rod