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  1. J

    Circular Logic

    Please explain this plumbing to me. The left valve controls suction. The more left the valve, the more the skimmer works. The right valve controls return. Turned left the whips operate, turned right the wall returns operate. When the left valve is turned right and the right valve is turned...
  2. J

    Where do these two pipes go?

    Please focus on the return-side plumbing that follows the left valve actuator. Pipes from left to right: 2" - spa jets 2" - paramount six-port water valves (two) (both get pressure even when all the return side valves after the actuator valve are closed) 1" - ? (open and close 0.5 PSI bounce...
  3. J

    Calcium Hardness, Vinyl, Fiberglass

    Is Calcium Hardness necessary for Vinyl and Fiberglass? What about the deck?
  4. J

    Pool Calcium Hardness 90 ppm, tap water 150 ppm

    The pool's calcium hardness is 90 ppm. The hose bib connected to the auto-fill line gives me water with 150 ppm. How is this possible? Did I let my pH get to high and the water gave up some of it's calcium hardness?