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.
