Pentair 070951 Tube Seal Gasket Replacement Pool and Spa Water Heater Gasket tube seal replacement Fits Pentair MiniMax Plus, MiniMax CH, NT STD, NT LN, NT TSI pool and spa heater models IID, 150, 200, 250, 300, 400 Also fits Pentair PowerMax pool and spa heater models 150, 200, 250, 300, 350, 400 Compatible with Pentair MiniMax pool and spa heater models 91 to 01-97, 75, 100