3720821-1WHZW Waterway 2.0 HP 2-Speed Spa Pump 230V 8.0/3.0A, Waterway EX2 Side Discharge, 56 Frame, 3" O.D. Fittings New Version Replaced Obsolete Original

Waterway EX2 2.0 HP 2-Speed Spa Pump (56 Frame, 230V, 3" x 3")

Another version replaced the obsolete 3720821-1WHZW hot tub pump. It uses a Waterway EX2 wet end and a 56 frame motor, the best current matchup for your spa's plumbing setup.

Key Specifications

• Horsepower: 2.0 HP
• Speed: 2-Speed
• Voltage: 230V
• Amperage: 8.0 Amps (High Speed) / 3.0 Amps (Low Speed)
• Frame Size: 56 Frame
• Plumbing Connections: 3" O.D. Intake / 3" O.D. Discharge (measured across the openings - edge to edge)
• Wet End: Waterway EX2

Compatibility & Cross-Reference

• Current Version Replacement For: Obsolete Waterway model 3720821-1WHZW
• Fitment Note: This pump has 3" O.D. intake and 3" O.D. discharge connections. Always measure your existing fittings before ordering.

Frequently Asked Questions (FAQ)

Is the 3720821-1WHZW spa pump obsolete?
Yes. The original 3720821-1WHZW model is discontinued. This 2.0 HP 2-speed 56 frame pump with 3" 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 3720821-1WHZW.

What are the plumbing connection sizes for this pump?
This pump uses 3" 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.