Description
Independent Supplier & Replacement Part Notice
We are an independent parts supplier and are not affiliated with, sponsored by, or endorsed by Watkins, Hot Spring, Caldera, Tiger River, or Solana. These names and their part numbers are used only to identify compatibility.
We offer replacement parts as alternatives to spa-branded parts. When this listing identifies a part as the same original-manufacturer replacement, it is supplied under the component manufacturer’s branding and part number, which may differ from the Watkins or spa-brand label and number. Other compatible alternatives are identified in the individual product listing. Please review the listed specifications, fitment details, and any installation differences before ordering.
Exact-fit replacement for Watkins 39578-03 - this 2.5 Horsepower, 12.0/4.4 Amp dual-speed 56 Frame complete pump delivers reliable performance for your Hot Spring spa.
Physical dimensions: 7 1/4" across pump face, 7 3/8" measured from bottom to top of pressure volute side, 15" back-to-front edge measurement. Both suction and pressure side thread fittings are designated 2" x 2" with actual 3" measurement from thread edge to thread edge.
Important: Many suppliers sell alternative brands that don't provide precise fitment. This pump guarantees exact compatibility with your Hot Spring tub specifications.
Compatibility Note: Visually similar to Aqua-Flo and CMP pumps - these models are interchangeable when replacing the complete pump assembly.
Understanding Watkins Wavemaster Pumps: Watkins sources pumps from manufacturers rather than producing them in-house. They apply their part numbers to pumps from various suppliers. Our offering provides the identical pump or closest available equivalent from original manufacturers, without Watkins branding. Key difference: our pump excludes the rear exhaust vent modification, allowing proper motor cooling as originally engineered by the manufacturer for optimal end-user performance.
