Replacing short section of PVC pipe in hot tub - tight fit!

Discussion in 'Plumbing Forum, Professional & DIY Advice' started by John Prinos, Aug 21, 2020.

  1. John Prinos

    John Prinos New Member

    Joined:
    Aug 21, 2020
    Location:
    Toronto, Ontario, Canada
    Hello all,

    I have a hot tub that had a leaky 2 inch flex PVC pipe connection (into the filter housing) I tried the vacuum sucking glue trick a few times but it did not work.

    Ultimately I cut the pipe and was able to extract the pipe from both fittings using a 2” hole saw heated with a blow torch. (Magic!). See attached pic.

    I have a replacement section of hose but my worry is that I do not think I can fit the pipe quickly enough on both sides and twist it to ensure a good glue bond. The fittings on the filter end cannot move and the other end moves with difficulty. How long will the glue allow me to twist the pipe before it hardens to the point where it cannot be twisted? (I.e. never did this before!)

    Should I first glue/twist the pipe at the filter housing end where I had the leak and then glue/fit/push on the other side and hope for the best?

    Thanks in advance,
    John
     

    Attached Files:

  2. fitter30

    fitter30 Active Member

    Joined:
    Feb 2, 2020
    Occupation:
    Retired service tech
    Location:
    Peace valley missouri
    Is there a hose id that matches pipe fittings just thinking ontside the box or make a u shape out of fittings.
     
  3. Sponsor

    Sponsor Paid Advertisement

     
  4. Jeff H Young

    Jeff H Young In the Trades

    Joined:
    Feb 27, 2020
    Location:
    92346
    yep glue it up!
     
    John Prinos likes this.
  5. gagecalman

    gagecalman Member

    Joined:
    Nov 25, 2016
    Location:
    Baltimore, MD
    If that's 1-1/2" flexible PVC the OD should be 1.90". I wonder if the ID of the fittings is too big after being bored out with a 2" hole saw.
     
  6. Jeff H Young

    Jeff H Young In the Trades

    Joined:
    Feb 27, 2020
    Location:
    92346
    Boring it out almost an 1/8 of an inch not a good thing. I was wondering that too , but thought that too obvious . he did say 2 inch though but figure he would have noticed maybe it was an 1 7/8" bit
     
  7. Reach4

    Reach4 Well-Known Member

    Joined:
    Sep 25, 2013
    Location:
    IL
    He did not say he cut with the hole saw. He might have just used that to apply heat to something.
     
    Jeff H Young likes this.
  8. Jeff H Young

    Jeff H Young In the Trades

    Joined:
    Feb 27, 2020
    Location:
    92346
    Im assuming he did it right.
     
  9. John Prinos

    John Prinos New Member

    Joined:
    Aug 21, 2020
    Location:
    Toronto, Ontario, Canada
    As far as I know, no. The replacement 2inch inner diameter pipe fits the fitting diameter. It seems to be standard for hot tubs.

    I think I would want to keep the section as free of turns, elbows etc since it might affect flow performance of the hot tub. Just unsure about that aspect.
     
    Last edited: Aug 22, 2020
  10. John Prinos

    John Prinos New Member

    Joined:
    Aug 21, 2020
    Location:
    Toronto, Ontario, Canada
    That is 2 inch inner diameter.
    The hole saw was used as a heating element to soften the pipe in the fitting. I cut the pipe 1 cm from the fitting, heat the hole saw into the 2 inch flex pipe and waited about 3 minutes. I was able to remove the now softened pipe from the fittings. That all went well, as can be seen from the pic in the original post.
     
  11. John Prinos

    John Prinos New Member

    Joined:
    Aug 21, 2020
    Location:
    Toronto, Ontario, Canada
    nope, did not use the hole saw as a cutter but as a good fit to the inner diameter to the pipe I wanted to remove.
     
  12. John Prinos

    John Prinos New Member

    Joined:
    Aug 21, 2020
    Location:
    Toronto, Ontario, Canada
    ok, I will try to dry fit as practice. I will determine which end I should put on first (the fixed filter housing end or the slightly flexible elbow end)

    Any other advice would be welcome!
     
  13. John Prinos

    John Prinos New Member

    Joined:
    Aug 21, 2020
    Location:
    Toronto, Ontario, Canada
    Correct! I learned of this method of removing Pipe from fittings (and being able to reuse the fittings) on YouTube
     
    Jeff H Young likes this.
  14. John Prinos

    John Prinos New Member

    Joined:
    Aug 21, 2020
    Location:
    Toronto, Ontario, Canada
    Removal of pipe from fittings seemed to work
     
  15. wwhitney

    wwhitney Active Member

    Joined:
    Mar 17, 2019
    Location:
    Berkeley, CA
    What's the distance between the two hubs, and what is the maximum insertion depth of a pipe in a hub?

    Cheers, Wayne
     
  16. gagecalman

    gagecalman Member

    Joined:
    Nov 25, 2016
    Location:
    Baltimore, MD
    Thanks for the post. I learned something new today.
     
    John Prinos likes this.
  17. John Prinos

    John Prinos New Member

    Joined:
    Aug 21, 2020
    Location:
    Toronto, Ontario, Canada
    The space between the fittings is 4 1/4 inches. The fittings can take just under an inch each.
    It looks like the original flex pipe was around 5 1/4.(Pieced the old pieces together)
     
  18. John Prinos

    John Prinos New Member

    Joined:
    Aug 21, 2020
    Location:
    Toronto, Ontario, Canada
  19. Jeff H Young

    Jeff H Young In the Trades

    Joined:
    Feb 27, 2020
    Location:
    92346
     
    John Prinos likes this.
  20. wwhitney

    wwhitney Active Member

    Joined:
    Mar 17, 2019
    Location:
    Berkeley, CA
    So is there enough movement to get the hubs to 5-3/4" apart? If so, you can just glue up both joints at the same time with a 5-3/4" pipe segment. Mark your pipe to be be sure it's centered in available 6-1/4", rather than 1" in one hub and only 1/2" into the other hub.

    Since the old joint leaked, it would be nice to get a longer pipe segment in there than just 5-1/4".

    If you can't get enough movement, you may have to just replace a greater length of pipe, so you have more maneuverability.

    Cheers, Wayne
     
  21. Jeff H Young

    Jeff H Young In the Trades

    Joined:
    Feb 27, 2020
    Location:
    92346
    missed that yea 6 1/4 inch piece!
     
Similar Threads: Replacing short
Forum Title Date
Plumbing Forum, Professional & DIY Advice Replacing Shut Off Valve - Copper Pipe Too Short Nov 18, 2013
Plumbing Forum, Professional & DIY Advice Replacing bath tub spout and cut nub too short???? May 13, 2007
Plumbing Forum, Professional & DIY Advice Replacing Plastic Ice Maker Water Line Oct 7, 2020
Plumbing Forum, Professional & DIY Advice Replacing cast iron drain Issue Sep 29, 2020
Plumbing Forum, Professional & DIY Advice Replacing sewer ejector pump help Sep 19, 2020

Share This Page