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Thread: Bonus tip from a licensed Journeyman plumber

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    Bonus tip from a licensed Journeyman plumber

    For those of you interested in doing the 3/8 upgrade..... The 1/4 NPT tap for cutting threads into a 7/16 hole drilled into Schedule 40 PVC pipe can be difficult to find. This is to let you know that that same 7/16 hole can be tapped with a standard 1/2 - 20 tap. This has been done in the plumbing world for years, and it relies on the fact that the standard tap is straight, whereas the NPT fittings is tapered. Don't over tighten, as your threads are only made of plastic.

    Pool: IG 22k- 16x32 clipped corners- vinyl liner, w/ a great board. Built in 3/99, new to me 2/2011.
    Equip: Hayward 3600 DE filter, Hayward CL-200 Chlorinator (empty since 7/5/2013).
    K-2006 Test kit with Speedstir
    Located in Cincinnati, OH. TFP lurker since 9/2011, BBB interested since 5/2012 and converted 7/2013.

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    Mod Squad JohnT's Avatar
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    Re: Bonus tip from a licensed Journeyman plumber

    Thanks for the tip!
    TFP Moderator
    20K Gallon 20X36 Vinyl Inground
    Hayward S244T Sand Filter with 1HP Whisperflo Pump. Liquidator C-201 and Solar Heat

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    Re: Bonus tip from a licensed Journeyman plumber

    Office Depot???? It's a valid link, but I never would have thought of a place like that!

    Pool: IG 22k- 16x32 clipped corners- vinyl liner, w/ a great board. Built in 3/99, new to me 2/2011.
    Equip: Hayward 3600 DE filter, Hayward CL-200 Chlorinator (empty since 7/5/2013).
    K-2006 Test kit with Speedstir
    Located in Cincinnati, OH. TFP lurker since 9/2011, BBB interested since 5/2012 and converted 7/2013.

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