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Waterway
Waterway Executive 4.0HP 2 Speed Pump 56Fr 3421621-13 (2.5")
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3721621-13 Waterway Executive 4.0HP 2 Speed 56Fr Pump
Specs:
- 4.0 Horsepower
- 56 Frame
- 230 Volts
- 12 / 4.4 Amps.
- 2-1/2" Suction and 2" Discharge
- Side Discharge
- Manufacturer: Waterway
- Manufacturer Number: 3721621-13
- Manufacturer Warranty: 2 years motor, 3 years wet end.
- UPC Code: 806105077387
Technical and Installation:
- Pump is manufactured in the wet-end orientation shown, but you can simply rotate you wet end to match your spa plumbing, if needed.
- Pump is manufactured without a pump amp cord. You will need to use your existing pump amp cord or purchase a new one.
- Please see How to Wire a Spa Pump to wire the pump amp cord.
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Can use the following gaskets/orings:
- 2" Pump Union O-Ring 805-0230 (6000-645)
- 711-4010 Waterway Heater Flat Gasket
- 21619 Balboa ® | Heater Coupling Gasket 2"
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Frequently Asked Questions
A spa air blower forces air into the spa's air plumbing system to create bubbles through the air jets. This produces the bubbling massage effect many hot tubs are known for and enhances the overall hydrotherapy experience.
No. Some spas use only water jets that mix air through a venturi system. Spas that include a dedicated air blower produce stronger bubbles and a more intense massage effect.
Common signs of a failing spa air blower include: No bubbles coming from the air jets, Loud humming or grinding noises, The blower not turning on, Weak or inconsistent airflow. If your spa previously had strong bubbles and they suddenly stopped, the air blower may need to be replaced.
Spa air blowers are commonly available in 1.0 HP, 1.5 HP, and 2.0 HP models. The correct size depends on the number of air jets and the plumbing length in your spa. Matching the horsepower of your existing blower is usually the best option.
Yes. If water flows backward into the blower it can damage the motor. This is why most spa systems include a check valve in the air line to prevent water from reaching the blower.
A loud blower can be caused by: Worn motor bearings, Debris inside the blower housing, Airflow restrictions in the plumbing, A failing blower motor. If the noise continues to get worse, replacement may be necessary.
Many spa owners can replace an air blower if they are comfortable with basic electrical connections. However, if you are unsure about wiring or spa electrical components, professional installation is recommended.
No. An air blower simply pushes air into the spa plumbing. Some models have heated air features that warm the air slightly for comfort, but they do not heat the spa water.