Help...Whats this tubing?

Roy_C

Can anyone identify this tubing? I'd like to know if it has an oxygen barrier.

hot_rod

Looks like Bio-Energy Radiant Roll. A non barrier EPDM tube.

Roy_C

Thanks. After some research, looks like the homeowner is in for some painfull news...

hot_rod

The best method to address that old tube is to 1st run a pressure check on the entire manifold and loops. If it holds, remove every loop and see if they still flow. Flush each loop and build a new manifold. Isolate the system from ferrous components with a HXer of some sort.

If it was properly designed and installed it provides one of the most even floor temperatures of any installation method.

If nothing shifts and rips the tube, it could run a long time.

Roy_C

It sounds like there might be hope after all.

The tubing doesn't seem to be brittle on the few loops we looked at so that's good news. The system is full of rust and need a good flushing.

How would you suggest we build new manifolds? Are there barbed fittings?

hot_rod

As luck would have it, 1/4'' copper tube fits tightly inside. If it slides in without splitting you are in luck. The tube seems to stay soft if it has not been not exposed to UV or high temperatures.

You can buy 1/4 barb fitting at auto supply (vacuum fittings) or welding shops for torch hose fittings.
But I've found copper tube holds fine up to 30 psi or more. Get some of the plastic ratchet clamps at auto shops also.

So get a piece of 1" copper, drill 1/4 holes every 2" and solder in a 3" long piece of 1/4 copper tube. There is your new manifold.

But first build a nozzle like this for your compressor and test every loop. They sometimes sludge shut beyond salvage. If you have a bunch sludged shut, time for plan B.

Roy_C

Thanks very much for the input. I really hope we can save this house.