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Author:
rfcc (CA)
Hello,
I have a water leak under concrete stairs (outside / PVC pipe)
Question.
I want to insert a line of PEX into the existing PVC pipe
As I can see I need to make one 90 degree or turn / bend
Looking for suggestions on how to make the turn / bend and how to insert the PEX, best practices.
The run is about 50'
Thanks in advance
RC
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Author:
packy (MA)
you just don't shove one pipe into another and expect it to be sealed ? you are looking at 50-75 or 100 pounds of pressure.
trying to be helpful but can't imagine what you are proposing to do ???
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Author:
sum (FL)
I assume you are trying to abandon the leaking PVC pipe and instead use it as a"sleeve" to pass the PEX through and somehow connect that PEX to existing PVC piping on either end?
That 90 turn, since it's a water pipe, so either it's irrigation or main supply from meter to house? It should be pressure elbow meaning it's a sharp turn, I don't think a PEX can get through it.
If you want to try anyway, one method is to take a very small string on one end, and a shop vac on the other sucking on the pipe, the small string might be sucked into the pipe deeper and deeper, eventually coming out on the other end. Then tie a rope to it and pull the rope through, then tie the PEX to the rope and pull the PEX through. Even if that works the PEX may be kinked at the 90.
Edited 1 times.
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Author:
rfcc (CA)
Thank you!
Edited 3 times.
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Author:
bsipps (PA)
I would suggest not trying this
You may get the pex through the 90 but if you kink it and you will most likely kink the pex it will cause very poor flow and quite possibly rupture
Sorry to say but maybe find another way around the steps or bust them up and repair properly
Like our friend Bern says do it once cheaply then do it twice properly
Edited 2 times.
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Author:
bernabeu (SC)
do not waste your time and effort
you MIGHT be able to pull a PEX tube through a straight run BUT you will NEVER pull a 'useful' size through a run with an elbow in it
Edited 1 times.
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Author:
sum (FL)
the only way this would work is if the PVC pipe is oversized and whoever did the 90 did it wrong and used drain elbows.
If he has a coil of fiberglass electrical fish tape can try that too if a fish tape can't get through easily a PEX has no chance.
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