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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.


  • 3
    Pump volume

    Posted by Larry Lush on Oct 23, 2023

    The new pump doesn’t pump nowhere near the volume as the old one. If there were more jets there would be little or no pressure

  • 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