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3721621-1D Waterway Spa Pump 2-speed, 230V, 12.0/4.4A Executive 56 frame 6.5" diameter 2" SD/CS. Threads measure 3.1" outside diameter. High performance Water Way Hot Tub Pump, very strong motor, split capacitor design, double shielded ball bearings. Viton Seals. Overall length=17" Labelled 4.0HP but often relabeled 5hp, 6hp, and even 7hp. 37216211d, P240E52024. Intake and discharge threads are same size as each other and 3.1" outside diameter.
Overall length 16-7/8", height 9", width 8-1/4". Energy Efficient, labelled 4.0 HP, often marked by spa manufacturers as 6.0 BHP, which is the maximum brake horsepower it can produce. Spa Pumps, Hot Tub Pumps; sometimes ships with US Motors/Emerson motor, and sometimes with A.O. Smith/Century 7-187563-02 motor. , 3721621-0D87, 3721621-0D36, 3721621-0D, 3Y21621-0D, 3721621-0D76, 3721621-1D5A, 3721628-0D85LB, 3721621-0D85CT, 3721621-0D76VK, 3721628-1D, 3721628-0D7G, 3721621-0D85, Niagara, Massage Master XLT, R63MWENA-4727, 3721628-0D5A
Order optional union fitting o-rings here: O-Ring Pack
Optional union fitting gaskets: Gaskets
Can be labelled by one of these 'model numbers', which do not completely define the product like a part number does: PF-40-2N22M, PF-40-2N22MC, PF-30-2N22C, PF-30-2N22M, PF-30-2N22MC, PF302N22C, PF-50-2N22C, PF402N22M, and if you go by the model number, please carefully verify your motor amps rating and the outside diameter of your intake and discharge threads. Any doubts, please email us a few photos and we will help verify for you. email to: info@spapumpsandmore.com
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a great spa pump 
