Find your parts diagram
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.
Still not sure? Call (818) 818-6559 and we'll find it for you.
Waterway 417-5040B Union Tailpiece | 2" Buttress x 2" Slip
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Goes with this part
CA P65 Warning: Cancer and reproductive harm. www.p65warnings.ca.gov
OEM Waterway Union Tailpiece 417-5040B is a precision-molded connector built for 2-inch pool and spa plumbing systems. This tailpiece links 2-inch buttress thread fittings to 2-inch slip-style plumbing and is designed for compatibility with 2-inch and 2.5-inch heater unions. Its durable construction resists chemical damage and high-pressure conditions, making it ideal for long-term use in aquatic environments. Whether used in a new build or a retrofit, this component promotes smooth water movement and ensures dependable, leak-resistant operation.
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Buttress Thread to Slip Adapter: Joins 2-inch threaded and slip fittings for a secure and functional plumbing transition.
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Works with Heater Unions: Engineered to pair with 2-inch and 2.5-inch unions used in heating applications.
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Resists Chemical Degradation: Durable material withstands harsh pool environments for extended use.
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Fits Any Installation Type: Reliable choice for new system setups or retrofit plumbing upgrades.
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Improves System Flow Integrity: Helps maintain consistent pressure and flow by reducing the chance of leaks or misalignments.
(1) Waterway Union Tailpiece | 2" Buttress x 2" Slip | 417-5040B