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hePEX tubing burst coming off my geo-thermal unit this am.

Scrappy123
Member Posts: 1
in Geothermal
Any ideas why my tubing burst and flooded my basement?
0
Comments
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Could have a freeze up? It can burst even if its pex / ehPEX.
Did the failure happen on the pipe itself or a fitting or joint?0 -
Do you have a photo of the damaged tubing? Was it near your loop pump? Is your loop pressurized or atmospheric?1 pipe Peerless 63-03L in Cedar Grove, NJ, coal > oil > NG0
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If it froze it could very easily have popped it off the hose barb0
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Did the failure occur on the desuperheater piping?0
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If it expands 6x and that part was on a fitting it will no longer be on the fitting.
I don't think there is a point where water would be liquid and hot enough to soften it enough to burst.0 -
Temperature and pressure relationship with pex. ASTM F877 dictates the temperature/ pressure listing on the tube.
While not published or stamped on the tube, it can be tested to something like 248°F for 3000 hours, 125 days as part of the stabilizer functionality test.
Not all pex is created equallyThat long alphabet of numbers on the tube tells a story. Depends on the cross-linking method, better pex generally costs a bit more, for a reason.
Bob "hot rod" Rohr
trainer for Caleffi NA
Living the hydronic dream1 -
Some of the pex listing criteriaBob "hot rod" Rohr
trainer for Caleffi NA
Living the hydronic dream0 -
I do believe that @Scrappy123 may be a one post wonder....
https://www.youtube.com/watch?v=EZ1_jNnAHWg
"If you can't explain it simply, you don't understand it well enough"
Albert Einstein2 -
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