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Old 04-02-2012, 12:46 PM   #1
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running PVC pipe through joists


Is it ok to heat pvc to make it more flexible so I can feed it through the floor joist holes. Otherwise I need to put a coupling between each joist.

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Old 04-02-2012, 02:06 PM   #2
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running PVC pipe through joists


Not sure about heating it (people do it; how I'm not sure) but be sure you are not drilling too large a hole or too close to the edges of your floor joists (you'll weaken them and have a bigger problem).
Search this site or google for hole size and placement in a joist; this has been covered a bunch of times.
What size pipe and what size joists?

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Old 04-02-2012, 02:29 PM   #3
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Quote:
Originally Posted by Doug60m View Post
Is it ok to heat pvc to make it more flexible so I can feed it through the floor joist holes.
Er... that's a BIG fat NO.

Quote:
Otherwise I need to...
Otherwise... you you need to install the pipe BELOW the joist.

Something like this:
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running PVC pipe through joists-central-vac-pipe.jpg  
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Old 04-02-2012, 03:34 PM   #4
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running PVC pipe through joists


the ONLY time i see where it is legit to bend PVC is for pool installs where the PVC has to curve to the shape of the pool. but they use special torches and it takes a lot of expertise and practice to do it successfully without weakening the PVC.
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Old 04-02-2012, 06:33 PM   #5
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running PVC pipe through joists


How thick is the pipe? I put 9 ft of 2 inch ABS through a 2x6, 16 inch centre wall without needing any heat. Granted, you need room behind it to start and a big hammer. Got easier once i was through the second stud.
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Old 04-02-2012, 06:47 PM   #6
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...Granted, you need room behind it to start and a big hammer.
I once removed some siding and sheathing on a building in order to get pipe (over 600LF of 3" PVC) into the joists between floors. That was a fun day.
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Old 04-02-2012, 06:51 PM   #7
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How about some Vaseline or other lubricate to help get it through?
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Old 04-02-2012, 08:05 PM   #8
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Is it ok to heat pvc to make it more flexible so I can feed it through the floor joist holes. Otherwise I need to put a coupling between each joist.
Have you considered using PEX tubing instead?

HRG
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Old 04-02-2012, 10:52 PM   #9
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running PVC pipe through joists


Here's a thought :


What are you using the pvc for?
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Old 04-02-2012, 10:58 PM   #10
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Is this a drain or supply line?
Suppys should be copper, Pex or CPVC not PVC.
No way do you want to have couplings every few ft.
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Old 04-03-2012, 07:03 AM   #11
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More answers than questions. Where did the OP go?
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Old 04-03-2012, 10:13 AM   #12
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More answers than questions. Where did the OP go?
To go buy a blowtorch.

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Old 04-03-2012, 10:48 AM   #13
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and some astroglide
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Old 04-03-2012, 05:05 PM   #14
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Task done, 1 1/2 inch pvc. My weight was enough to bend it and then banged on the end to move it along. Thanks for all the thoughts.
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Old 04-03-2012, 09:46 PM   #15
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Quote:
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Is it ok to heat pvc to make it more flexible so I can feed it through the floor joist holes. Otherwise I need to put a coupling between each joist.
I can't count how many greenhorn apprentices I've watched struggle with this. I finally have pity on them and show them another "trick of the trade"

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