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  1. swamprat69

    pentair air pressure switch settings

    While researching a Pentair minimax NT problem for someone I came across some useful info regarding the actual set points for Pentair air pressure switches that lists the switch set points by Pentair part number and air pressure switch label color in some cases. I don't know how to make this...
  2. swamprat69

    Liquid Chlorine vs SWG CYA recommended levels

    I have noticed a large difference between recommended CYA levels for liquid chlorine vs SWG pools. Living in Las Vegas with a high UV Index, I have found it difficult to maintain chlorine levels with CYA at 40-50 due to large daily swings. I seem to have found what I consider a sweet spot with...
  3. swamprat69

    Ignition modules, flame rectification and true RMS multimeters

    I have been answering questions regarding gas/propane pool heaters for a while now and thought it might be time to add a knowledge base to some of these "mysteries". AC voltage is a sinusoidal wave form that is continuously variable. It can deformed by different variables in the circuit so that...
  4. swamprat69

    high FC and PH

    I have read that when FC is over 10 ( correcting for high CYA or slamming) that PH readings will be incorrect. Since the PH appears to be higher than it actually is when tested, I am assuming that the high FC is skewing the PH when chemically tested. Would a digital PH meter show the correct PH...
  5. swamprat69

    Pigeon Problem solved

    When I first got my house with a pool I had 30-40 pigeons sitting on my roof in the morning waiting turns to get a drink. Needless to say I had pigeon poop all over my deck and the pool/spa spillway. Also whenever it rained the pigeon poop from the roof would wash down onto my patio. After some...
  6. swamprat69

    FC available for sanitation when balancing FC vs CYA

    I have read that when balancing FC vs CYA that your FAS-DPD FC reading is not the FC that is actually available for sanitation and that bathers actually see. I assume that this is the reason that SLAM FC is pushed up so high. Is there a formula to figure out the actual FC available for...
  7. swamprat69

    Chlorine discrepancy?

    Just got TF 100 kit. Daily test shows 5-10 chlorine with color nearer 10. When tested with titration FC only shows 5. Total tests: FC 5, CC 0, CA 600, CYA 80,TA 110,PH 7.6, TDS 1500. Las Vegas water starts at CA 290, so hard to keep it down with summer evaporation. I see that with CYA of 80, I...
  8. swamprat69

    Pool heater repair

    I am an extremely handy retired HVAC service technician. This is my third pool in my lifetime. Recently my 400K BTU Hayward pool heater started leaking at the water header. I took it apart and order a new O-Ring/gasket. Cleaned all surfaces and installed new O-Ring/gasket. It still leaks! Do you...