I am installing Pex tubing to connect copper-tube baseboards. Do I need to use the Pex with an oxygen barrier in this application?

I don't think so, as long as the pex will not be in cement at any point. Make sure it is rated for the temps that are required. Hope to hear the advice of the other pros here. While I'm at it, can you guys tell me how important the oxygen barrier really is. What purpose does it serve, or is it just a way to sell more expensive tubing. I can't actually see any difference between potable and nonpotable pex(at least not in wirsbo)

Hi all...

In my area we use FOSTAPEX (or any other 02 barrier type PEX tubing) for heat and water distribution... although more expensive it is FORM STABLE and that leads to a better looking job as the pipe has a tendency to retain the shape it is set in and remains that way.

The 02 barrier is required on all systems that have any CAST IRON COMPONENTS (CI baseboard, CI radiators or CI boilers) as these components can rust from excessive 02 penetration into system through pipes. If no cast iron (as in a steel boiler) then any PEX pipe will do.

Now, I'm not into the chemistry end, but only remember what I was told, so you guys would need to explore this more if need more info. but overall I would recommend the 02 barrier type PEX... if only for the fact that it is easier to work with... in my opinion... ;)

Let me know what you think...

MARK

Makes sense. Thank you Mark. Im always interested in ways to make pex installs look professional. I was brought into this business strictly on copper. Can make a really nice looking install with copper. But the prices of copper just jumped way to high to be competitive in our area. Hence we went plastic. Good to know that o2 will conform better. Hopefully I won't have to anchor it every 6 inches to make it look level.LOL My theory is that electricians can run their wires all over the place, and now we can make our plumbing look like their wiring. As they say, most of it gets covered up anyway, and I can't see it from my house.( I actually hate when my coworkers say that. I can see it before it gets covered, and if it were my house I would like to know that it looks professional even if it is covered)

Thanks, guys!