3/4" pvc pipe seems to have swollen/expanded

Discussion in 'Irrigation / Sprinkler Forum' started by sshepherd, Jul 6, 2011.

  1. sshepherd

    sshepherd New Member

    Jul 6, 2011
    Pendleton Oregon
    I put in a new irrigation system last spring. I hadn't hooked up the drip system last year and am attempting to do so now except the pipe that I put in last year is just slightly bigger that the fitting that I just bought. The extra pipe in the garage (same pvc pipe) still fits the new couplers. I have tried sanding but it did not help. Any suggestions? Why did the pipe swell? :mad:
  2. mike1059

    mike1059 irrigation tech.

    Jun 6, 2011
    irrigation tech. for a landscape company
    Portland, OR
    Although I have never run into a swolen pipe I have had deformed ends that will not fit a new fitting. Do you have room to cut the pipe back 1 or 2 inches, that should get you a clean fit.
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  4. LLigetfa

    LLigetfa DIYer, not in the trades

    Feb 6, 2011
    NW Ontario, Canada
    Is this flex or rigid PVC? Flex PVC has a much lower pressure rating and so exposure to high pressure at warm temperatures could account for the swelling.
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