Waterway Viper 4.0 HP 2 Speed 2.5" Pool Pump - 3721621-1T

(No reviews yet) Write a Review
On Sale
Was: $359.99
Frequently bought together:


Waterway Viper 4.0 Horsepower Dual Speed Pump 3721621-1T features include a Viper wet end especially designed for 56 frame hot tub motors. There are 2 double shielded ball bearings with moisture resistant grease for longer life and quieter operation. The larger 2 1/2″ intake improves flow performance and reduces pump noise. This pump uses Viton seals and the replacement hot tub pump operates at 2 speeds and features 2.5″in and 2.5″out connections.


  • 56 Frame Motor improves reliability
  • Greater strength, lower operating temperatures
  • Runs quietly
  • Double-shielded dual ball bearings with water resistant grease.
  • Large pump/wet end increases head pressure
  • Thermal protection for greater motor longevity
  • Energy consumption is reduced by split capacitor
  • Versatile design may be used in many types of hot tubs
  • 90-degree rotation on wet end allows greater versatility
  • Viton shaft seal design for hot tub applications


  • 4.0 HP
  • Two Speed
  • 230 Volts
  • Intake/Discharge - 2.5"
  • Amps: 4.4 low speed / 12.0 high speed

View AllClose

0 Reviews

View AllClose