371-1621-H Waterway 4.0 HP 1-Speed Spa Pump 230V 12.0A, Waterway Viper Side Discharge, 56Y Frame, 3.6" O.D. Fittings New Version Replaced Obsolete Original

Waterway Viper 4.0 HP 1-Speed Spa Pump (56Y Frame, 230V, 3.6" x 3.6")

Another version replaced the obsolete 371-1621-H hot tub pump. It uses a Waterway Viper wet end and a 56Y frame motor, the best current matchup for your spa's plumbing setup.

Key Specifications

• Horsepower: 4.0 HP
• Speed: 1-Speed (3450 RPM)
• Voltage: 230V
• Amperage: 12.0 Amps
• Frame Size: 56Y Frame
• Plumbing Connections: 3.6" O.D. Intake / 3.6" O.D. Discharge (measured across the openings - edge to edge)
• Wet End: Waterway Viper

Compatibility & Cross-Reference

• Current Version Replacement For: Obsolete Waterway model 371-1621-H
• Fitment Note: This pump has 3.6" O.D. intake and 3.6" O.D. discharge connections. Always measure your existing fittings before ordering.

Frequently Asked Questions (FAQ)

Is the 371-1621-H spa pump obsolete?
Yes. The original 371-1621-H model is discontinued. This 4.0 HP 1-speed 56Y frame pump with 3.6" O.D. fittings is the current version replacement.

Where is the part number located on my hot tub pump?
It is printed on the specification label on the side of the motor. Look at the line marked MODEL to confirm it matches 371-1621-H.

What are the plumbing connection sizes for this pump?
This pump uses 3.6" O.D. (outside diameter) fittings for both the intake and the discharge. When measuring your old pump, measure across the openings - edge to edge.

Questions or not sure it fits? Call 858-210-8062 or text photos of your old pump and motor label to 858-215-4460.