Pentair MasterTemp® / Sta-Rite Max-E-Therm® Basic Heater Manifold Kit | 474200 The Pentair 474200 Basic Manifold Kit is an OEM replacement heater water manifold kit used on Pentair MasterTemp and Sta-Rite Max-E-Therm pool/spa heaters. The manifold assembly helps manage water flow through the heater and provides the sealing hardware needed to restore leak-free operation when the original manifold or its seals are worn, cracked, or leaking. Compatible Heaters Pentair MasterTemp natural gas: 175NA, 200NA, 250NA, 250HD, 300NA, 400NA, 400HD Pentair MasterTemp propane: 175LP, 200LP, 250LP, 300LP, 400LP Sta-Rite Max-E-Therm natural gas: SR200NA, SR200HD, SR333NA, SR333HD, SR400NA, SR400HD Sta-Rite Max-E-Therm propane: SR200LP, SR333LP, SR400LP Tip: Always confirm your heater model and parts diagram before ordering, since manifold styles can vary by revision. What’s Included (1) Manifold (1) Threaded plug (1) Rectangle gasket (12) O-rings (10) Bolts (10) Washers Common Reasons to Replace Water leaking from the manifold area or around internal seals Cracked, warped, or chemically damaged manifold body Heater was disassembled for service and old seals no longer reseal reliably Recurring seepage after gasket/O-ring replacement (manifold sealing surfaces damaged) Installation Notes Turn off power and gas supply to the heater, shut off the pump, and allow the heater to cool fully before service. Relieve system pressure and drain the heater water circuit as needed. Clean mating surfaces before installing new gaskets/O-rings; replace any damaged sealing surfaces. Tighten fasteners evenly (cross-pattern) to help prevent leaks and distortion. After restart, verify proper flow and check carefully for leaks during heat-up. Related Products Search Aqua Pool Supply for 474200 Pentair MasterTemp replacement parts Sta-Rite Max-E-Therm replacement parts Pool heater gaskets & seals Heater O-rings MasterTemp/Max-E-Therm union kits Maintenance Tips Maintain balanced water chemistry to reduce scale and corrosion that can shorten heater component life. Address low-flow conditions early (dirty filter, clogged baskets, closed valves) to reduce stress on internal heater parts. If you see repeated manifold seepage, inspect for freeze damage or misalignment in plumbing that may be stressing the heater connections.
