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

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Waterway Executive Pump 56F 4HP 2 Speed  2", #3721621-1D

  • 4 HP Waterway Executive 56 Hot Tub Pump
  • Waterway OEM Part # 3721621-1D
  • 2.0" 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 Click Here
  • Additional barb fitting may be required in place of the drain plug. Part # 672-4350

The 4 HP Waterway Executive 56 # 3721621-1D 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. Warranty to be registered by homeowner


  • 5
    Excellent pump

    Posted by Dave Wright on Feb 26, 2023

    Replaced the pump in my hot tub, was easy to swap. Friendly and helpful staff along with great prices. Highly recommended.

  • 4
    Waterway 56F 2sp pump

    Posted by Aaron on Feb 07, 2023

    The pump works great but it does not come with seals or fittings to fit the drain plugs for the air hoses. The threads are none standard and tough to seal.

  • 5

    Posted by Danny on Dec 07, 2022

    Fast delivery

  • 5
    As described

    Posted by Mark on Dec 03, 2022

    Canada Hot Tubs knows there products!

  • 5

    Posted by Len Coffey on Nov 25, 2022

    Knowledgeable staff, very helpful and polite

  • 5
    Waterway executive pump

    Posted by Paul Hebert on Sep 18, 2022

    Thank you for your very good services and great products

  • 5
    Water pump

    Posted by Brian Preston on Apr 05, 2022

    Fit right in easy install

  • 5

    Posted by Kevin Swanson on Mar 13, 2022

    Honestly, I can talk about the performance of the pump itself, as I haven't had a chance to install it yet. If it is anything like the product that I am replacing - the exact same pump - then I expect I will get many years of service out of it. The current one has lasted 15 years.

    The service from Canada Hot Tub Parts was excellent, however. The pump was sent quickly, and arrived sooner than I expected, in great shape. Thanks, folks! Can't wait to get the hot tub up and running again!

  • 5
    Great doing business

    Posted by Philippe on Feb 23, 2022

    It was great doing business. We spoke to a sell rep for our parts and with few minute he know exactelly what we need. Parts was ship right after we order. Also we save like 400$ from buying local.

    Thanks, will do business again