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Thread: Plumbing Mysteries

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    michaelrbanks's Avatar
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    Plumbing Mysteries

    Now that I'm a chemistry expert, I've moved on to trying to fully understand the mechanics behind it all. I'm left with three outstanding questions about my setup (see associated diagram):

    1.) What is a relief & how does it affect me?

    2.) This pipe was labeled PF by the builder - I'm thinking "Pool Floor," but after reviewing the pictures I have of the trench, it's an independent line separate from "Pool Drain" in the lower left corner of the diagram. Is it possible they plumbed two lines all the way from the equipment pad into the main pool drain?

    3.) Why is this valve here & why is it partially closed? I have an elevated spa with a spillway into the main pool. While in pool mode, there is a small amount of flow into the spa through the jets, but clearly, the three-way valve after the heater is closed to the spa. Is the ball valve at #3 a way to balance the flow between the pool and spa through the check valve?

    Thanks for the insight!
    Plumbing.jpg
    16,661 gal IG PebbleTec w/ Spa; 60 ft2 Jandy DE filter, 2 HP Jandy Variable Speed pump; 2 skimmer; 400K BTU Jandy heater; Polaris Sport; opened 9/15/14; TF-100 test kit

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    Re: Plumbing Mysteries

    First, the relief valve is so that you van adjust it so that some water flow will bypass the water flow and that allows you to set the flow over the WF to your liking. Valve 2 must be your main drain line. Valve 3, well, I don't see any purpose for it all all

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    michaelrbanks's Avatar
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    Re: Plumbing Mysteries

    I had a tech from the pool builder out yesterday for the routine maintenance provided under my first year warranty. When I asked him about #3, he told me it was to intentionally restrict the flow to the pool so that 75% of the water went to the spa & 25% went to the pool. This was to ensure proper flow over the spa spillway into the pool.
    16,661 gal IG PebbleTec w/ Spa; 60 ft2 Jandy DE filter, 2 HP Jandy Variable Speed pump; 2 skimmer; 400K BTU Jandy heater; Polaris Sport; opened 9/15/14; TF-100 test kit

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    Re: Plumbing Mysteries

    Yeah, that's what valve #3 is for. I should have recognized that.

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