polybutylene tubing

Sam_14

We're working on a radiant system built around 1980 using QUEST-C-PB2 110 tubing. We're concerned acout the life expectancy of polybutylene tubing. We've recently had one pin hole in the tubing in the light weight suspended slab. Our concerns are will the tubing be expected to have eventual failure?

Enviro-Temp
Heating and air conditioning

Josh_10

All I can say is ouch! I wish that you had better luck but yes you are going to have eventual failure. I would consider other options. Anyone else know something I don't?

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kevin coppinger_4

the tubing...

is really not the problem..it was the acetal/plastic fittings...it is still used in Europe. the only concern I would have is the O2 barrier? probably not one on it although they did make some w/ the barrier that was coated red....

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Weezbo

Flush the system

what temp was it running at? is it seperated by a heat exchanger?

JackFre

Back in the day

I installed a bunch of poly-butte (pre-pex days)in the late 70's-early 80's. Always exchanged it. The systems are operating still according to those I still speak to.

hr

It could last our lifetime!

hard to say. Typically what happens if it is in fact the non barrier type is it will allow rust and corrossion which often starts to plug up the tube. If you do not catch it soon enough it will not be able to be flushed clean.

Check the loops or manifolds for flow, get all the ferrous components out of the non barrier side and it may be fine for many years.

Typically the plastic fittings were used in plumbing systems. The radiant or heating systems generally had copper or brass fittings and copper, brass, plastic, or steel manifolds and connections.

hot rod

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