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Sticker on the pump body (the part with the basket), not on the motor. Motor labels from Century, A.O. Smith or Regal won't match parts.
Label on the side of the tank near the base. Size is in sq ft, e.g. 420 sq ft = C4030 or CCP420.
Rating plate inside the front access panel. Note the BTU and gas type (NG or LP).
Molded into the body or printed on top. Robotic cleaners: on the power supply.
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42001-0402 | Pentair Slip Half Union For Max-E-Therm Heaters | 2" | 2 Pack
Fits these models (2)
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Goes with this part
CA P65 Warning: Cancer and reproductive harm. www.p65warnings.ca.gov
Other parts on the same Sta-Rite Max-E-Therm SR400NA Heater
The Pentair 2-Inch Slip Half Union 42001-0402 is an OEM replacement kit designed for Sta-Rite Max-E-Therm pool and spa heaters. This kit includes two slip unions, two locking nuts, two couplers, and two O-rings, providing everything needed to form a secure and leak-resistant connection between the heater and the pool plumbing system. These unions make it easy to disconnect and reconnect the heater during routine service, repairs, or replacements, helping reduce downtime and simplify maintenance tasks. Constructed to meet OEM Pentair specifications, the unions are built to withstand pool chemicals, water pressure, and frequent use without compromising reliability. By maintaining strong and consistent connections, this kit helps extend the life of your Max-E-Therm heater and ensures it continues to operate safely and efficiently.
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OEM Union Kit: Specifically designed for Sta-Rite Max-E-Therm heaters, providing durable and precise connections that match original factory specifications.
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Complete Package: Includes two 2-inch slip unions, two couplers, two locking nuts, and two O-rings for a full installation or replacement.
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Leak-Free Operation: Creates a secure seal that prevents leaks and protects the heater’s performance during routine use and high-pressure operation.
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Maintenance Friendly: Makes disconnecting and reconnecting the heater straightforward, saving time on servicing or system upgrades.
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Durability Assured: Manufactured to OEM Pentair standards with rugged materials that resist pool chemicals and environmental exposure.
- (2) Locking Nuts
- (2) Couplers
- (2) O-Rings
- Pentair Sta-Rite Max-E-Therm Heaters
