Outdoor Wood Furnace Info

All-Purpose OWF Discussions => Plumbing => Topic started by: jreimer on January 09, 2017, 03:29:46 PM

Title: Pex-Al-Pex bubbling on inside?
Post by: jreimer on January 09, 2017, 03:29:46 PM

Anyone else experience their pex-al-pex bubbling on the inside? 

Yesterday I needed to replace the leaking rad that heats my garage/shop that has 3/4" pex-al-pex underground supply line running to it.  When I cut off the old connectors I had to cut back the line several times before I found a round part to put the new connectors on.  The inside was bubbling and separating from the aluminum layer.  Water temps are 185 max.

Title: Re: Pex-Al-Pex bubbling on inside?
Post by: RSI on January 09, 2017, 05:22:42 PM

I have seen it before and assumed it was over heated. I have the same stuff on my system and has not done it.

Title: Re: Pex-Al-Pex bubbling on inside?
Post by: shepherd boy on January 15, 2017, 11:04:11 AM

Have seen it split on the inside and finally work it's way to the outside. Thinking maybe the expansion rates were different for the pex and the metal shield.

Title: Re: Pex-Al-Pex bubbling on inside?
Post by: slimjim on January 16, 2017, 03:19:15 AM

I have seen it several times and a couple of times even on the good stuff like Vega Fosta Pex, it got really hot, it's pretty much convinced me to use copper on my jobs!