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Waterway Executive Pump 56F 4HP 2 Speed 2.5"/2"

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Waterway Executive Pump 56F 4HP 2 Speed 2.5", #3721621-13

  • 4 HP Waterway Executive 56 Hot Tub Pump
  • Waterway OEM Part # 3721621-13
  • 2.5" Intake and 2" Discharge
  • Wet end can be rotated 90 degrees
  • High Speed 12.0 Amps (3450 RPM)
  • Low Speed 4.4 Amps (1725 RPM)
  • New Cord not included, sold separately if required
  • Additional barb fitting maybe required in place of drain plug. Part # 672-4350

The 4 HP Waterway Executive 56 #3721621-13 is a durable high performance pump that delivers reliable water flow efficiently. Always select a replacement pump with the same part number as the Waterway part number.   

One (1) Year Limited Warranty on Product, see Owner's Manual for a full description of warranty claims and coverage details.


  • 5

    Posted by Joey Labranche on May 14, 2023

    Good assistance, fast shipping!

  • 5
    4hp 2.5 x 2 Waterways 2 speed pump

    Posted by David Merralls on Jul 01, 2021

    Original lasted 12 years 24/7
    New replacement is working fine.

  • 5

    Posted by David Merralls on Jun 04, 2021

    My hot tub supplier would not supply a new pump and motor without a service call, Waterways would not ship to a Canadian address. Canada Hot Tub parts saves the day and this tub, so I was able to repair the unrepairable

  • 5
    Waterway 56 pump

    Posted by Tony Desroches on May 02, 2021

    Great pump at a good price with quick delivery. I would order again.

  • 5
    nice quiet powerful motor

    Posted by B Russell on Apr 23, 2021

    very happy . thank you

  • 5
    Pump Ordered

    Posted by Kris Kolochen on Feb 13, 2021

    Ordered a pump online during Xmas. Once I explained that it somehow got missed during the holiday. I was given an apology about the missed shipping ASAP and rec'd the product within the week. Very good service. Thanks.

  • 4
    new pump install

    Posted by freddy on Nov 27, 2017

    all went good, but watch the wiring configuration, as it was a bit different compared to the old pump