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5 HP Viper Spa Pump 2 Speed 230V 3722021-1V 5.00HP 230V - Bubbles Supply

5 HP Viper Spa Pump 2 Speed 230V 3722021-1V

Part #: 3722021-1V

$1143.22
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About this spa pump

The Waterway Viper 5 HP 2-Speed Spa Pump delivers professional-grade performance for larger hot tubs and commercial spa applications. This 230V pump features dual-speed operation at 16.4/4.8 amps, providing efficient circulation and powerful jet action when you need it. Built with Waterway's proven 56Y frame design, this main pump handles high-flow demands while maintaining reliable operation.

At Bubbles Supply, we guarantee this pump will fit your spa exactly as intended, backed by our comprehensive 1-year warranty and same-day shipping on in-stock orders. The dual-speed functionality gives you energy-efficient low-speed filtration plus high-speed therapy performance. Before installation, confirm your electrical specifications match 230V requirements and verify plumbing connections align with your existing setup for seamless replacement.

Exact part number

3722021-1V

Save this for ordering or warranty claims

Also known as / Replaces

This part replaces or is interchangeable with:

  • 3722021-1V pump
  • Viper 56Y spa pump
  • Waterway Viper 5HP 2-Speed

Looking for an older part number? Check our supersession lookup tool

Technical specifications

Voltage
230V
Horsepower
5.0 HP
Frame size
56Y frame
Speed
Two-speed
Amperage
16.4A high / 4.8A low @ 230V

Common symptoms this part fixes

If your spa is showing any of these signs, this part is likely your fix:

  • Pump won't start or respond to controls
  • Motor hums but impeller won't spin
  • Weak or no jet pressure on high speed
  • Pump runs only on one speed, second speed dead
  • Pump trips breaker under load
  • Excessive noise or vibration from motor bay

Not sure if this is your problem? Try our diagnostic centre or .

Before you buy — quick checklist

  • Confirm your spa runs 230V — this pump is not compatible with 115V systems
  • Verify your existing pump's frame size is 56Y before ordering
  • Check the HP rating on your old pump's motor label — do not rely on the spa manufacturer's spec sheet alone
  • Measure your existing plumbing union sizes to confirm they will mate with this pump's ports
  • Confirm your control system supports a 2-speed pump on the circuit you're replacing
  • Note whether your existing pump is a wet end replacement only or a full pump assembly — this is a complete pump assembly

Reading the checklist now prevents 90% of returns. Worth the 60 seconds.

Install difficulty: Medium — Some experience neededTypically 60-90 minutes

What's in the box

  • Waterway Viper complete pump assembly
  • Motor with pre-mounted wet end

If your order is missing any items listed above, contact hello@bubblessupply.com within 48 hours of delivery.

Warranty

1 year manufacturer warranty against defects

Covers manufacturing defects. Does not cover improper installation, normal wear, or accidental damage.

Warranty claims: warranty@bubblessupply.com

Perfect Fit Guarantee

Ordered with our help and the part doesn't fit? Contact us before installation. We'll resolve it with an exchange, replacement recommendation, or return approval.

Learn about our Perfect Fit Guarantee →

Shipping

We ship across the US and Canada. US orders ship from our US warehouse to US customers; Canadian orders ship from our Canadian warehouse to Canadian customers — no cross-border shipping, no surprise duties. In-stock orders placed before 3pm CT ship same day. Standard shipping $9.95 flat rate. Free shipping on orders over $200. Express options available at checkout.

Returns

30-day hassle-free returns on unused parts in original packaging. Contact us before returning to receive your RMA number.

Frequently asked questions

Check the Compatibility section above to confirm fitment for your spa brand and model. If your model is not listed, use our fitment selector at /pages/find-my-part or ask our parts AI for a personalized recommendation.

In-stock orders placed before 3pm CT ship the same day. You will receive tracking information by email as soon as your order ships.

We accept returns within 30 days of delivery for unused items in original packaging. Email returns@bubblessupply.com with your order number to start a return. Installed electrical parts cannot be returned for safety reasons.

Yes, all new parts come with a 1-year warranty against manufacturing defects. Warranty does not cover damage from improper installation or normal wear and tear.

Customer reviews

AI Fitment Assistant

Tell us your spa model and we will confirm this part fits before you buy.

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