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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
  • Additional barb fitting maybe required in place of 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.  If you have any questions please contact us at 1-888-356-4202
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
    Just Awesome

    Posted by Kevin on 4th Feb 2021

    Good price. Works well. Ordered 1 day and received the next. Couldn't ask for a quicker turn around!!

  • 5
    Perfect Fit

    Posted by Mike T. on 13th Dec 2020

    Tech on the phone helped me through the correct motor choice.
    This was a replacement motor for the original Gecko I had in my hot tub. It fit perfectly, runs cool and quiet.

  • 5
    Great pump & service

    Posted by Mark on 22nd Nov 2020

    Had to make a small adjustment to the spa pack as this pump was a touch wider than the Gecko pump I had, but overall works perfectly. Gentleman I spoke to on the phone was very friendly and helpful. Highly recommend Canada Hot Tub Parts.

  • 5

    Posted by Unknown on 10th Nov 2020

    I was in a pinch as we lost our second pump on the hot tub. With colder temps around the corner I was worried about sitting water in the manifolds (just replaced). I received the pump 2 days after ordering!!!

    Extremely happy withy experience with Canada Hot Tub Parts. Thank you!!!

  • 5
    Product works as advertised

    Posted by ET on 10th Oct 2020

    Replaced old waterway with new one, good price and product shipped in good condition.

  • 5
    Fast ship, great fit

    Posted by Bubba on 22nd Jul 2020

    Received pump very quickly. Was kept updated with text messages about shipping. Pump was an exact fit. Just had to move the heating unit about 1/2” to get the top fitting on. Highly recommend ordering from this company

  • 5
    Super quiet

    Posted by Mike on 9th Jun 2016

    I recently purchased a Waterway and its a replacement. Great pump that is really quiet. I would recommend this product for anyone looking for a spa pump.

  • 5
    Fits perfect !

    Posted by Arvo Lang on 20th Feb 2014

    Just bought this pump and had a local company change it for us. It was easy for them to change and runs super quiet compared to old one. Came with correct cord.

  • 4
    High Quality Pump !

    Posted by Art Sewell on 27th Oct 2013

    The Executive 56 is easy to install and re align the housing if required. Within an hour I was back up and running.

    Highly Recommended !