Check valve? Pump says no; Heater says yes.
My equipment is below the pool surface line.
Page 35 of VS-SVRS Install guide:
"Check valves must NOT be installed on the suction or discharge side of the pump. Also, IntelliFlo pumps
cannot be used in series with other pumps"
Page 12 of Mastertemp Install guide:
"Install the chemical feeder downstream of the heater. INSTALL a chemical resistant one-way check valve between the
heater and the chemical feeder to prevent back-siphoning through the heater when the pump is off."
Is this "Check" or "Checkmate"?
Hope there is an answer. Thanks again.