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Thread: running pvc pipe for backwashing

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    running pvc pipe for backwashing

    I hate having the backwash hose lying all over the place or having to roll it up all the time so I was thinking of running some pvc pipe underground. I really do not want to dig a trench 40'-50' long and down below the frost line. Would it be a bad idea to just go a few inches below the surface and run the pipe.

    I need to install about 5-90 degree elbows in the run. Can I get away with this if I just blow the line at the end of season?
    20,000 gallon viking fiberglass pool w/aqua comfort heat pump, pentair whisperflo pump 1.5hp autopilot dig-220 swg w/RC42 cell (42,000), pg2000 fiber optic lights
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    Re: running pvc pipe for backwashing

    The number of 90's you use won't matter.

    I'm not too comfortable with advice about frostlines, but if you lay that pipe carefully with a slight pitch, the water will always drain and I would see no reason to go below frostline or blow the pipe in the fall.
    Dave S.
    42k vinyl and concrete pool, 1.5hp pump, 140gpm filter
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    Mod Squad woodyp's Avatar
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    Re: running pvc pipe for backwashing

    No pressure on a "drain" line only. Had my AGP just installed and hard plumbed the backwash out to the street. Gonna be a heck of a lot less trouble I hope.
    16x32x52" Steel Cornelius Miramar AGP Vinyl liner 13,100 gal. Buried 2 ft.
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    Re: running pvc pipe for backwashing

    Quote Originally Posted by duraleigh
    The number of 90's you use won't matter.

    I'm not too comfortable with advice about frostlines, but if you lay that pipe carefully with a slight pitch, the water will always drain and I would see no reason to go below frostline or blow the pipe in the fall.
    What Dave said. I have mine buried maybe 18 inches below the ground. My frost line is about 3 feet, but a drain like that doesnt matter. If you want to cut down on 90's or no joints at all, go get some black poly. That stuff is perfect for this application. Even flex PVC is a good material to use for this.
    14,000 gallon IG, Vinyl. Hayward 3/4 hp superpump, Penatair IC40 SWCG, Pentair automation, Hayward sand filter, Aqua Comfort heat pump, Hayward 400k Lo-Nox LP heater.

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