🚀 New launch promo — 10% off orders over $300. Use code LAUNCH10
Bubbles Supply
Not sure which part you need? Upload a photo and we'll find it. →
56Y Frame 2" MBT x 2" MBT Wet End 310-1740 4.00HP - Bubbles Supply

56Y Frame 2" MBT x 2" MBT Wet End 310-1740

Part #: 310-1740

$207.64
In stock — ships today
Qty
🔒 Secure checkout↩️ 30-day returns✅ 1-year warranty
Add to B2B order list

Not sure this fits?

Send us a photo of your old part — we'll confirm the right replacement before you order.

Upload a Photo
1-year warrantySame-day ship before 3pm CTPerfect Fit Guarantee30-day returns

About this wet end

This Waterway Executive 56Y frame wet end delivers reliable performance for 4.0HP spa pumps requiring 2" MBT (male buttress thread) inlet and outlet connections. Designed specifically for Waterway's Executive pump series, this OEM wet end maintains the precise hydraulic flow your spa system was engineered to deliver.

Built to Waterway's exacting standards, this wet end features durable construction that withstands continuous operation and chemical exposure. At Bubbles Supply, we guarantee this is the exact fit for your pump with our same-day shipping and comprehensive 1-year warranty backing every purchase. Before installation, confirm your existing pump frame matches the 56Y specification and verify the 2" MBT threading on both suction and discharge ports for proper fit.

Exact part number

310-1740

Save this for ordering or warranty claims

Also known as / Replaces

This part replaces or is interchangeable with:

  • 2-inch MBT wet end
  • 56Y wet end
  • Executive 4.0HP wet end
  • Waterway Executive wet end

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

Technical specifications

Horsepower
4.0 HP
Frame size
56Y
Port type
2" MBT inlet and outlet

Plumbing notes

  • Port type: 2" MBT inlet and outlet

Need help measuring? Email hello@bubblessupply.com with a photo of your existing plumbing.

Common symptoms this part fixes

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

  • Weak or no water flow from jets
  • Visible cracks or leaks at the pump housing
  • Impeller damage causing cavitation or noisy operation
  • Pump runs but cannot build pressure
  • Worn volute causing loss of prime

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

Before you buy — quick checklist

  • Confirm your existing pump motor is a 56Y frame — check the motor label or measure the face diameter
  • Verify both inlet and outlet ports on your current wet end are 2" MBT (male buttress thread) — do not assume based on pipe size alone
  • Check that your motor is a Waterway Executive series before purchasing this wet end
  • Inspect the motor shaft diameter and rotation direction to confirm compatibility before installing
  • Confirm your pump is a 4.0HP unit — horsepower must match for proper hydraulic performance

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

Install difficulty: Medium — Some experience neededTypically 45–90 minutes

What's in the box

  • Wet end housing with impeller volute
  • Seal plate
  • O-ring(s)

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.

🔒 Secure checkout · SSL encrypted·🇺🇸🇨🇦 Serving the US and Canada·↩️ 30-day hassle-free returns·📦 Same-day fulfillment