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Thread: Is there a trick to sealing threaded PVC??

  1. #1
    cruzmisl is offline Established User Weir Watcher cruzmisl 0
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    Default Is there a trick to sealing threaded PVC??

    HI All,
    I replumbed my filter and pump today. All is well but I have a few very slow leaks at some of the threaded joints (a thimble full every few hours) I tried everything to fix these things up to and including using 10 wraps of teflon tape to no avail. Is there a liquid pipe compound I could use that may give better results? I've taken it apart four times now and still no luck. It's not a big leak but frustrating.
    Thanks,
    Joe

  2. #2
    CarlD's Avatar
    CarlD is offline Super Moderator Vortex Adjuster CarlD 4 stars CarlD 4 stars CarlD 4 stars CarlD 4 stars CarlD 4 stars CarlD 4 stars
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    Default Re: Is there a trick to sealing threaded PVC??

    Ok, 3 things may be going on:
    1) your theads on the fittings may be damaged. Then they leak.

    2) You are using the tape wrong. It should be pulled very tightly around the threads and go in so the tape it pulled tighter, not bunching up.

    3) You aren't tightening the fittings enough. Did you may sure to use only Schedule 40 fittings? Some have longer thread areas allowing you to have more sealing.

    I hope this helps.

    There is a liquid teflon called plumber's joint compound. It used to be called Plumber's Dope, and the tape was Tape Dope. No foolin'!
    Carl

    16'x40' rectangle 19K gal AG vinyl pool; ; Hayward T210 sand filter; Hayward 2 Speed Superpump 1hp pump; hrs; PS 233; PF:6.3

  3. #3
    cruzmisl is offline Established User Weir Watcher cruzmisl 0
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    Default Re: Is there a trick to sealing threaded PVC??

    Thanks Carl,

    I tightened them down quite a bit and used the tape properly. I'm going to give the Permatex #2 a try tomorrow, let it cure for 4 hours and see what happens. Pentair says it's OK to use.......

  4. #4
    tenax is offline Established User Widget Weaver tenax 0
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    Default Re: Is there a trick to sealing threaded PVC??

    i've used permatex 2 as well and it works pretty slick. one thing to watch from my experience this year is if you put it on 0 rings for example (i.e. behind it) it creates this thick gunk that doesn't seal well in combination with the o-rings.

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    Default Re: Is there a trick to sealing threaded PVC??

    There is a product that is called plumbers goop that you can put on to stop the leak.

  6. #6
    cruzmisl is offline Established User Weir Watcher cruzmisl 0
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    Default Re: Is there a trick to sealing threaded PVC??

    I think I'll try this.

    http://www.oatey.com/apps/catalog/in...hite%20PJC.pdf

    seems safe. Hopefully it works well.

    Joe

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    Default Re: Is there a trick to sealing threaded PVC??

    Quote Originally Posted by cruzmisl View Post
    I think I'll try this.

    http://www.oatey.com/apps/catalog/in...hite%20PJC.pdf

    seems safe. Hopefully it works well.

    Joe
    That is what I use, no problems!
    Joe

  8. #8
    cruzmisl is offline Established User Weir Watcher cruzmisl 0
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    Default Re: Is there a trick to sealing threaded PVC??



    I was looking at the install last night and while I'm not a plumber, it looks WAY better than what the PB did. I also used all hard PVC, no flex tube.

    Once I get all the minor leaks sorted, I'm going to hook up my liquidator.

  9. #9
    catnip is offline Established User Thread Analyst catnip 0
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    Default Re: Is there a trick to sealing threaded PVC??

    I used Great White pipe dope recently and it worked well. I did have to tighten one joint a half turn to stop a very slow seep.
    Chuck
    16,000 gallon gunite/plaster, Pool Pilot Digital SC-60, Pentair UltraFlow 1 HP pump, Pentair Tagelus TA 60 filter, Polaris 280

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    Default Re: Is there a trick to sealing threaded PVC??

    Quote Originally Posted by cruzmisl View Post
    I think I'll try this.

    http://www.oatey.com/apps/catalog/in...hite%20PJC.pdf

    seems safe. Hopefully it works well.

    Joe
    We used that stuff all the time when I was plumbing, stir it up really well first to get all of the goo on top mixed in. Either that or dump it out, I always stirred it though. Good luck on it, leaks are tough sometimes, especially the drips.
    steve

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