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4HP Executive Pump 230v 2-Speed 56 FR 2 1/2 Inch 3721621-13 Niagra

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SKU:
3721621-13
MPN:
3721621-13
Availability:
3721621-13
Shipping:
Calculated at Checkout
Now: $386.77
RRP: $422.22

Description

Waterway Executive 4HP, 2-speed, 56 frame, 230V spa pump 3721621-13 is a complete, brand name replacement hot tub pump by Waterway Plastics.

This 4HP replacement pump has the larger intake for 2 1/2 inch plumbing.  
If 2 inch plumbing connections are needed on both the suction and discharge, then see 3721621-1D. 

Free Shipping in the continental U.S.A.

This 4HP 56 frame Executive pump has the larger 2 1/2 inch intake and standard 2 inch discharge.
This is the original motor and wet end. 

  • 56 Frame Executive Wet End
  • 56 Frame Executive Motor
  • 2 1/2" Intake for improved flow  (actual suction measurement 3-11/16"od)
  • 2" Discharge  (actual discharge measurement 3-1/16"od)
  • High Speed Amps:  12 amps
  • Low Speed Amps:  4.4 amps
  • Wet End can be rotated
  • Viton Shaft Seals
  • 2-Speed Motor
  • 4 Horsepower
  • 230 Volts
  • 60hz for North America

waterway 4hp pump

Pump cords sold separately if needed (AMP or JJ) but most of the time, the existing pump cord can be used if it is in good condition. The current one already has the right plug on it to match up and plug directly into the spa control system, circuit board or pack.  Wet end can be rotated in 90 degree increments to line up with your plumbing.  This is a thru-bolt type motor/wet end/pump.

2 1/2” threads measure 3 5/8” OD
2” threads measure 3 1/16” OD

This brand name dual speed motor has double-shielded ball bearings with moisture-resistant grease for quieter operation and longer life too.

This pump model also used to replace 5HP Niagra pumps.  The rating of this pump is 4HP continuous which is the same performance as pumps labelled 5HP brake torque/non-continuous.

Note this the deluxe version of this brand name Waterway Executive pump that comes with full factory warranty.

Need orings? See the larger 2 3/4" ID oring O-245 and the standard 2 1/2" ID O-43 oring.

Unions?  The 2 inch pump union is 0602-20 if needed. The larger 2 1/2 inch pump union for the suction side is 400-5990 if needed.

Cords?  We offer 30-1001C 2-speed, 4 pin AMP pump cords and 30-0220-48 molded LIT cords as needed.

Speed 2 Speed (2-Spd) Executive Waterway Pump
Motor Voltage 230v
Drain Plug Location 3,6,9 o`clock
Pump to Motor Foot Types 4
Suction Style Center
Suction Connection (Physical Dimension) 3-11/16"od
Suction Connection Type Male Buttress Thread (mbt)
Suction Pipe Size 2-1/2"
Discharge Style Side
Discharge Connection (Physical Dimension) 3-1/16"od
Discharge Connection Type Male Buttress Thread (mbt)
Discharge Pipe Size 2"
Horsepower 4.0hp
Motor Frame 56 Frame Thru-Bolt
Motor Amperage/Wattage 12.0A/4.4A
Manufacturer Waterway

 

 diagram-waterway-executive-56-frame-parts-wetends3.jpg

1a Pump Union, 2" Female Buttress Thread x 2" Slip 0602-20
1b Pump Union, 2-1/2" Female Buttress Thread, 2" Slip 400-5990
2a O-Ring, Buna-N, 2-1/2" ID, 1/8" Cross Section, Generic O-43
2b O-Ring, Buna-N, 2-3/4" ID, 1/8" Cross Section, Generic O-245
3 Drain Plug, Waterway  715-1201
4 O-Ring, Waterway, Drain Plug/Valve Stem 805-0112
4 O-Ring, Buna-N, 7/16" ID, 3/32" Cross Section, Generic O-25
4 O-Ring, Buna-N, 1/2" ID, 3/32" Cross Section, Generic O-39
5 Screw, Waterway Exec/Renegade/Mustang, 8-32 x 7/16" 819-0005
6 Drain Plug Adapter, 1/4" Male Pipe Thread x 3/8" Barb 413-1201
6 Barb Adapter, Valterra 3/8" Barb x 1/4" Male Pipe Thread RF850
6 Barb Adapter, Waterway 3/8" Barb x 1/4" Male Pipe Thread 672-4350
7 Faceplate, Waterway Executive/Workman, 48 Frame/56 Frame, 2" 311-1220
7 Faceplate, Waterway Executive 48 Frame/56 Frame, 2-1/2" 311-1210
8 O-Ring, Buna-N, 6-3/4" ID, 1/8" Cross Section, Generic O-479 
9 Wear Ring, Waterway Executive 48/56fr, 4.0-5.0hp 319-1370
9 Wear Ring, Waterway Executive 48/56fr, 1.0-3.0hp 319-1380
10 Impeller, Waterway Executive, 1.0 Horsepower, Original Style 310-4220
10 Impeller, Waterway Executive, 2.0 Horsepower, Original Style 310-4210
10 Impeller, Waterway Executive, 3.0 Horsepower, Original Style 310-4200
10 Impeller,Waterway Executive, 4.0hp, Original Style 310-4190 
10 Impeller, Waterway Executive,0.75 Horsepower (Yellow/Red) 310-4230
10 Impeller,Waterway Executive, 5.0hp, Original Style 310-4180
11 Shaft Seal, PS-3865, 5/8" Shaft, Viton PS-1000 PS-3865R
11 Shaft Seal, PS-1000, 5/8" Shaft, Buna PS-1000
11 Shaft Seal, PS-1905, 5/8" Shaft, Silicon Carbide PS-1000 PS-1905
11 Shaft Seal, PS-961, 5/8" Shaft, Buna, Carbon Face PS-961
13 Water Slinger, Waterway Hi-Flo/Mustang/Executive 313-1400
14a Wet End, WW Executive 1.0hp 2"mbt 56fr 310-1710
14a Wet End, WW Executive 2.0hp 2"mbt 56fr 310-1720
14a Wet End, WW Executive 3.0hp 2"mbt 56fr 310-1730
14a Wet End, WW Executive 4.0hp 2"mbt 56fr 310-1740
14a Wet End, WW Executive 5.0hp 2"mbt 56fr 310-1750
14b Wet End, WW Executive 1.0hp 2-1/2"mbt x 2"mbt 56fr 310-1460
14b Wet End, WW Executive 2.0hp 2-1/2"mbt x 2"mbt 56fr 310-1480
14b Wet End, WW Executive 3.0hp 2-1/2"mbt x 2"mbt 56fr 310-1500
14b Wet End, WW Executive 4.0hp 2-1/2"mbt x 2"mbt 56fr 310-1440
14b Wet End, WW Executive 5.0hp 2-1/2"mbt x 2"mbt 56fr 310-1510
15a Motor, Century, 3.0 Horsepower, 230v, 1 Speed, 56 Y Frame B237
15a Motor, Century/WW, 5.0 Horsepower, 230v, 1-Spd, 56 Y Frame B238
15a Motor, US Motor/WW, 3.0hp, 230v, 1-Speed, 56Y Frame TS605
15a Motor, US Motor/WW, 5.0hp, 230v, 1-Speed, 56 Frame, SPL TS606
15b Motor, Century, 1.0 Horsepower, 230v, 2 Speed, 56 Y Frame B232
15b Motor, Century/WW, 2.0hp, 230v, 2-Spd, 56Fr B2233
15b Motor, Century, 3.0 Horsepower, 230v, 2 Speed, 56 Y Frame B2234
15b Motor, Century/WW, 4.0hp, 230v, 2-Speed, 56 Y Frame B2235
15b Motor, Century, 5.0 Horsepower, 230v, 2 Speed, 56 Y Frame B236
15b Motor, US Motor/WW, 2.0hp, 230v, 2-speed, 56Y Frame TT502
15b Motor, US Motor/WW, 3.0hp, 230v, 2-Speed, 56Y Frame TT503
15b Motor, US Motor/WW, 4.0hp, 230v, 2 Speed, 56 Y Frame TT505
15b Motor, US Motor/WW, 5.0hp, 230v, 2-Speed, 56Y Frame TT506
16a Pump, WW Exec, 2.0hp, 230v, 1-Spd, 56fr, 2", OEM 3710821-1D
16a Pump,WW Exec,3.0hp,230v,1-Spd,56fr,2",OEM 3711221-1D
16a Pump,WW Exec,4.0hp,230v,1-Spd,56fr,2",OEM 3711621-1D
16a Pump,WW Exec,5.0hp,230v,1-Spd,56fr,2",OEM 3712021-1D
     
     
     
     
     
     
     
     
16c Pump, WW Exec, 4.0hp, 230v, 2-Spd, 56fr, 2-1/2" x 2", OEM 372162
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