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Thread: How tight should the connection be?

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    How tight should the connection be?

    How tight should the connection be at the outlet side of the filter valve? I have a Jacuzzi 7-way dial valve, and there is a small drip at the outlet connection. When I turn off the pump, I can hear air sucking back into the filter, and I think it is at this connection. I'm going to replace the o-ring and re-tighten the connection. Should it be hand tight, or should I use channel locks and tighten it a little more? It seems to be hand tight now. Thanks.
    20,000 gal., Jacuzzi 250L Laser Sand Filter, inground w/vinyl liner, 1hp pump motor, TF-100 Test Kit.

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    Re: How tight should the connection be?

    Is that a compression fitting with a rubber o-ring that seals up against a flat surface on the other half of the connection?
    Dave S. - Forum owner
    42k vinyl and concrete pool, 1.5hp pump, 140gpm filter
    TFTestkits , PoolMath , Pool School

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    Re: How tight should the connection be?

    Yes.
    20,000 gal., Jacuzzi 250L Laser Sand Filter, inground w/vinyl liner, 1hp pump motor, TF-100 Test Kit.

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    Re: How tight should the connection be?

    Welcome to TFP!!

    The usual suggestion for threaded fittings is "hand tight plus 1 - 1 1/2 turns". For a union with an o-ring, I do hand tight + 1/8 - 1/4 turn.

    I think you have a bad o-ring and replacing it, as you plan to, will solve the issue
    Luv& Luk
    -Ted

    Having done construction and service for 4 pool companies in 4 states starting in 1988, what I know about pools could fill a couple of books - what I don't know could fill a couple of libraries :-D

    POOL SCHOOL, TF Testkits, Jason's Pool Calculator, CYA vs. cl chart, (Just a few DARNED handy links!)

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    Re: How tight should the connection be?

    I have good news and bad news. The instructions were written on the filter outlet, "Hand tighten plus 1/2 turn." I should always wear my glasses. The bad news....I did as per instructions, and, CRACK. It cracked at about 1/4+ turns. Your 1/8 to 1/4 is correct. When I get done with my little plumbing project....1/4 turn max. Good news, it's not cracked too bad and the extra tightening stopped the leak. Will replace compression fitting at my earlier convenience. Thanks.
    20,000 gal., Jacuzzi 250L Laser Sand Filter, inground w/vinyl liner, 1hp pump motor, TF-100 Test Kit.

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