Product Description

LX 4HP 1-Speed Spa Pump — Back in Stock at Western Tub and Pool
Your hot tub deserves a pump that works as hard as you do. The LX 4HP 1-Speed Pump delivers powerful, reliable water flow so you can get back to relaxing — fast.
Shop and order at Western Tub and Pool.
[Order Now] | [Call Us: 1-855-248-0777] | [Email: fixmytub@gmail.com]
What Is the LX 4HP 1-Speed Pump?
The LX 4HP 1-Speed Pump (model 56WUA400-I) is a high-performance replacement spa pump manufactured by LX Water Technology (Lingxiao). Engineered for North American hot tubs and spas, it delivers consistent, powerful water circulation that keeps your jets running at full strength.
Whether your current pump has failed or you're planning ahead, this is one of the most widely used 56-frame spa pumps on the market — and Western Tub and Pool has it ready to ship.
Key Specifications
|
Specification |
Detail |
|---|---|
|
Horsepower |
4.0 HP |
|
Speed |
1-Speed |
|
Voltage |
230V |
|
Amperage |
12A |
|
Frame Size |
56 Frame (Thru-Bolt) |
|
Inlet Size |
2" Male Buttress Thread (MBT) |
|
Outlet Size |
2" Male Buttress Thread (MBT) |
|
Suction Style |
Center |
|
Discharge Style |
Side |
|
Flow Rate |
Approx. 202–203 GPM |
|
Product Dimensions |
16-7/16"L x 8-3/4"W x 8-7/8"H |
|
Shipping Dimensions |
18" x 12" x 10" |
|
Shipping Weight |
Approx. 38–42 lbs |
|
Part Number |
56WUA400-I |
|
Manufacturer Warranty |
1 Year |
Why Choose the LX 4HP Pump?
Powerful, Consistent Performance
At 4.0 HP and 12 amps, this pump pushes approximately 202–203 gallons per minute, ensuring your jets deliver the pressure and hydrotherapy experience you expect.
A Trusted Universal Replacement
The 56WUA400-I is one of the most widely recognized 56-frame replacement pumps available. It is a proven substitute for the Aqua-Flo XP2E and Waterway Executive 56, making it a go-to solution for technicians and DIY spa owners alike.
Built to Last
Backed by a 1-year manufacturer warranty, this pump is built for the demands of continuous spa operation. Its large 56-frame thru-bolt construction provides a secure, vibration-resistant fit.
Hard to Find — We've Got It
Some spa parts are frustratingly difficult to track down. At Western Tub and Pool, we specialize in exactly these kinds of hard-to-find replacement parts. If you're not sure this is the right pump for your spa, just reach out — we'll help you confirm compatibility before you order.
Compatible Hot Tub Brands and Models
The LX 56WUA400-I is a standard or recognized replacement pump for the following spa brands and models. Always verify your part number, frame size, and plumbing connections before ordering.
- Jacuzzi Spas — Commonly replaces Theramax models (e.g., part numbers 6500-352, 6500-365)
- Sundance Spas — Used in models including the Cameo, Optima, and Marin (replaces part numbers such as 6500-367S)
- Arctic Spas — Often listed as Arctic Pump #2, #3, or #4 in specific configurations
- Cal Spas — Commonly integrated into large-frame jet systems
- Vita Spas — Recognized replacement for 4 HP Power-Flo models
- Barefoot Spas / Strong Spas — Used in 230V, 4-wire configurations
- Pinnacle Spas — Model PS630 utilizes this pump assembly
- Watkins / Hot Spring Spas — Compatible high-efficiency option for select configurations
Also compatible as a direct replacement for:
- Aqua-Flo XP2E (4.0 HP, 56 Frame, 1-Speed, 2" inlet/outlet)
- Waterway Executive 56 (same frame and plumbing configuration)
Note: This list is not exhaustive. Many additional spa brands and models use the 56-frame, 4HP, 230V pump configuration. If your brand or model is not listed above, contact us — we can help you verify compatibility using your part number, serial number, or photos.
Not Sure If This Is the Right Part?
Getting the wrong pump is a costly mistake. Here is what to check before ordering:
Confirm Your Frame Size
Look for "56 Frame" or "56Fr" printed on your existing pump's motor label. This pump will not fit 48-frame motors.
Check Your Plumbing Connections
This pump uses 2" Male Buttress Thread (MBT) connections on both the inlet and outlet. Measure your existing unions before ordering.
Verify Your Voltage
This is a 230V pump. Do not install it on a 115V circuit.
Check the Base Style
Standard models include a permanently welded steel mounting bracket. If your original pump used a sliding or removable clamp-style base, you may need the "NF" (No Feet / Bracketless) version instead.
Frequently Asked Questions
How do I know if this pump will fit my hot tub?
The best way to confirm compatibility is to match your existing pump's part number, frame size (56 Frame), voltage (230V), horsepower (4HP), and plumbing size (2" inlet and outlet). If you're unsure, send us a photo of your current pump's motor label, along with your spa's make, model, and serial number, and we'll confirm the fit for you.
What spas is this pump commonly used in?
This pump is used across a wide range of brands including Jacuzzi, Sundance, Arctic Spas, Cal Spas, Vita Spas, Barefoot Spas, Pinnacle Spas, and Hot Spring Spas, among others. It also replaces the Aqua-Flo XP2E and Waterway Executive 56 in the same 56-frame, 4HP, 230V configuration.
Can I install this pump myself?
Many experienced spa owners install replacement pumps themselves. However, because this pump involves 230V electrical connections and pressurized plumbing, we recommend having a qualified technician complete the installation if you are not confident working with high-voltage systems.
What if I have a hard-to-find part or I'm not sure what I need?
That is exactly what we are here for. Western Tub and Pool specializes in hard-to-find spa and hot tub parts. Send us an email at fixmytub@gmail.com with your part number (if known), photos of the existing pump, and your spa's make, model, and serial number — and we will track down the right part for you.
Does this pump come with a warranty?
Yes. The LX 56WUA400-I comes with a 1-year manufacturer warranty.
Do you offer support after purchase?
Absolutely. Western Tub and Pool also offers free in-home tutorials on spa, hot tub, and pool maintenance. Whether you need help with water care, troubleshooting, or part identification, our team is here to help.
Get the Right Pump, Fast
A broken pump means a cold, unusable spa. Don't let a failed part keep you out of the water longer than necessary.
Shop and order at Western Tub and Pool — and if you need help identifying the right part, we make it easy.
Call us: 1-855-248-0777
Email us:fixmytub@gmail.com
Not sure about your part? Send us photos of your pump, along with your spa's make, model, and serial number, and we'll confirm the right fit before you order.
[Order Now] | [Email fixmytub@gmail.com] | [Call 1-855-248-0777]
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