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    Y Valve question

    Have any of you seen a Y valve like the one shown in the Pentair Intellivalve manual like this? If so, can you provide a mfg and/or p/n?
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    ETi 400 High-Efficiency Pool Heater pressure drop curve

    I can't seem to find a pressure drop curve for this unit. Has anyone seen one that you could post? David
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    How to lower Total Alkalinity when...

    Our fresh make up water has a TA of 290 ppm. Our pool water readings are: FC 9.0 ppm CC 0.0 ppm pH 7.9 TA 210 ppm CYA 60 ppm CH 300 ppm Salt 4300 ppm CSI 0.41 Any suggestions?