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Author:
bnymbill (MD)
I have a unique situation where my entire house was replumbed and an upward-facing 1/2" 90 degree connection was left unglued. The piping passed inspection because it held 80 PSI. Is it possible for the vertical section going down into the 90 elbow to have kept enough pressure on the 90 to allow the system to hold 80 PSI?
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Author:
hj
It might if it was braced in such a way that it could not pop apart.
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Author:
jimmy-o (CA)
In addition to whatever "support" is acting on the pipe externally, the friction of the assembly will hold a lot, especially if they pushed it together pretty good. Stories are legend about this happening, and holding for years!
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Author:
LemonPlumber (FL)
your question, could an /interferon joint\note the term.Hold unglued hold at 110Lbs yes!!!Where the conditions during the assembly would be a matter of luck.proper cutting and positing of cpvc will hold it together less glue.Only sizing by water temp or positive and negative pressure effect the joint near 120/-40 psi.Guess I test pressure high.but never fail to vacuum.Our hydro static pumps ,push the test gauges to the 3?20 and we back them off for inspection.cpvc joints are unique.no glue is not as easy to detect as no solder.but have seen un-soldered copper thirty plus years old only dripping at high pressure.where missing solder is almost never seen /you have cpvc which is designed to mate .see yellow on the tubing???Was the proper glue used on any of the cpvc tubing?Mistakes can happen.often an unglued riser resulted from a mechanic who is trying to align the fitting perfectly, horizontally glued with a unglued 90 riser..Hope this is the case in yours.
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Author:
bnymbill (MD)
Thanks for the input. It looks like I was lucky it lasted this long and I'm glad I caught it a few minutes after failure. It is the vertical piece coming out of 90, is close to a joist, and is approximately 4' from the shower diverter. All of that adds up to very little movement which would help keep the joint together. There is a clear absence of yellow cement on the failed joint. I can email a pic if anyone is interested - quite a surprise and needless to say, I'm disappointed in my plumber.
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Author:
Wheelchair
Wasn't the lack of primer a give away?
Best Wishes
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Author:
hj
quote; I'm disappointed in my plumber.
WHY? He is only human, and we have ALL assembled pipes and missed/forgot to glue or solder them together. Usually we discover them during testing, but if the joint does not leak, and he does not remember not fastening them, HOW is he supposed to fix it?
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Author:
bnymbill (MD)
Part of being human is making AND being accountable for our mistakes. When I contacted him, he denied responsibility because it passed inspection. I emailed him the picture of a clean, disconnected joint with no yellow cement. We all know inspectors don't test each individual connection. Man up and fix your wrong-doing that the homeowner found by cutting out part of the ceiling after a flood. If you cemented two 1/2" pieces into a 90 and tried to pull them apart a week later, you have a better chance of cracking the pipe or 90 before breaking the cemented connection.
Edited 3 times.
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Author:
LemonPlumber (FL)
Wheel, We do not prime the best of cpvc tubing or fittings.NEVER.One step.this seems to be amiss step.I bet he has no other failures to his system.OK hope.
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Author:
hj
"Passing inspection" is not the "litmus test", because many things could "pass inspection" and still be installed improperly, IF the defect is not obvious, which this one did not seem to be.
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Author:
dlh (TX)
i have had copper hold at 80 psi for two weeks and only leaked when the wall vibrated from someone drilling so why couldn't cpvc?
- - - - - - -
PLUMBERS "Protecting The Health Of The Nation"
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Author:
bernabeu (SC)
At the NYC Manhattan House of Detention (the 're-habbed' one) a 1/2" Cu joint which had been fluxed but NOT SOLDERED held 110-140 psig (before a PRV) for over 2 years!
What a mess when it 'let go' !
this was circa 1985
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Measure twice, cut once.
Retired Plumbers Local Union #1
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