Pentair 471750 Flow Valve Assembly Replacement MiniMax Pool and Spa Heater Flow valve assembly replacement Fits Pentair MiniMax CH pool and spa heater models 150 IID, 150, 200, 250, 300, 350, 400 Fits Pentair MiniMax NT STD, NT LN, NT TSI pool and spa heater models 200, 250, 300, 400