Replacing Vacuum Pressure Breaker -PVC Glue Drying Time

Discussion in 'Irrigation / Sprinkler Forum' started by vaman, Aug 26, 2009.

  1. vaman

    vaman New Member

    Jul 15, 2009
    Hi.I'm the one with the broken Wilkins Vacuum pressure breaker. I have a new unit and pvc pipe and various fittings. This is my first time working with PVC pipe.How long do I need to let the primer and cement dry before turn on the water to the system?
  2. leejosepho

    leejosepho DIY scratch-pad engineer

    Nov 23, 2006
    disabled-retired industrial fabricator
    200 miles south of Little Rock
    Read the side of the can to be sure, but I always wait at least 30 minutes here at home.
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  4. Gary Swart

    Gary Swart In the Trades

    Sep 1, 2004
    Yakima WA
    Primer dries very rapidly, but I agree that at least 30 minutes on the solvent welds is wise. Not only before you turn water into it, but before you move or twist the joint.
  5. onedrop

    onedrop New Member

    Aug 7, 2009
    The glue we most commonly use does not use primer, but the directions say that you can pressure test after an hour and full strength is reached at 24 hours depending on temperature and humidity.

    Here are some instructions taken from this page:
    Gluing Pipe and Fittings
    Make sure all surfaces that are to be glued are clean and dry. Apply Primer to both surfaces thoroughly and evenly. Generously apply glue to both surfaces, quickly pushing them together while twisting (about a quarter of a turn.) The glue will dry in a few seconds, but will not reach its full strength for about 24 hours.

    I always wait 24 hours on any main line (line that always has pressure), but a half hour is fine for lateral lines (only have pressure when the valve is on).
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