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  1. J

    Shelf life of anti-freeze?

    Officially, most Propylene Glycol products have a shelf life of two years. Oxygen will decompose Propylene Glycol, so will heat above 100 degrees F or direct sunlight. So keep it in a cool shady spot. Yes, Propylene Glycol (RV Antifreeze) is used as a food additive and in eye drops, but I...
  2. J

    How to not break your Polaris quick disconnect.

    As an electrical engineer (MSEE), I have no interest in using an electrically driven device in my pool water unless I personally perform or review the FMEA (failure modes and effects analysis). I'll stick with the water powered.
  3. J

    How to not break your Polaris quick disconnect.

    The Polaris quick disconnect automatically locks when in use. To remove it from the wall fitting you must first unlock it. This is done by pushing it into the fitting. Then you can twist it out without braking it. This is illustrated in the attached image:
  4. Polaris Quick Disconnect Fitting 25.jpg

    Polaris Quick Disconnect Fitting 25.jpg

  5. J

    Rebuilding the Pool Plumbing and now working on the PB4-60 and Polaris 380

    Over the last few years I have replaced most of the 1-1/2 inch poly pipe with 2 inch PVC in our 34K gallon vinyl lined in-ground pool. It is now mostly schedule 40 with some schedule 80 at critical locations. There is also some CPVC at the heater. The flow rate is 70 GPM with both simmers and...