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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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Swimables SW-41-188 2" Half Union Adapter Kit | Pentair Heater | PKG188Z
Fits these models (2)
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CA P65 Warning: Cancer and reproductive harm. www.p65warnings.ca.gov
The Swimables SW-41-188 Half Union Adapter Kit is a premium replacement for Pentair PKG188Z, designed for MasterTemp and Sta-Rite Max-E-Therm heaters. This kit provides the hardware needed to connect 2″ slip unions to threaded or union-style fittings, ensuring tight and leak-free plumbing connections. Built from durable, chemical-resistant thermoplastics, it withstands pressure, pool chemicals, and repeated service cycles. Installing this kit restores secure heater connections and helps maintain consistent performance with minimal downtime.
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OEM-Equivalent Replacement for PKG188Z: Designed to match Pentair’s original union adapter kit, the SW-41-188 ensures a precise fit and performance. Its OEM-equivalent build guarantees compatibility with MasterTemp and Max-E-Therm heater systems.
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Reliable 2″ Half-Union Connection: Provides a solid connection between 2″ slip unions and threaded or union fittings. This leak-resistant design supports proper water flow and pressure regulation within the heater system.
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Durable Pool-Grade Materials: Constructed from heavy-duty thermoplastic, the adapters resist chemical degradation and mechanical stress. Their robust construction ensures reliable, long-term operation in demanding pool environments.
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Maintains Heater Integrity: Ensures secure plumbing seals that protect system efficiency and safety. Proper sealing prevents leaks, improves heat transfer, and reduces strain on heater components.
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Easy, Tool-Light Installation: Engineered for straightforward replacement during service or repairs, the kit reduces downtime. Simple installation helps both professionals and homeowners maintain system reliability.
- (2) Union Nuts
- (2) Couplers / Adapters
- (2) O-Rings
- Pentair MasterTemp Heaters
- Pentair Sta-Rite Max-E-Therm Heaters