♨️ LX WP250-II Spa Pump – 2.5HP Dual Speed Jet Pump

High-Performance Two-Speed Power for Demanding Hot Tub Systems

💧 Product Overview

The LX WP250-II is a powerful 2.5HP dual-speed jet pump engineered for larger hot tubs and swim spas requiring superior water flow and jet performance. As a step up from the popular WP200-II, the WP250-II delivers an impressive 670 litres per minute at high speed, making it ideal for spas with extensive jet systems or those seeking maximum hydrotherapy massage intensity.

This versatile two-speed design serves dual purposes: high speed powers your massage jets for an invigorating bathing experience, whilst low speed provides energy-efficient water circulation during heating and filtration cycles. The result is powerful performance when you need it and economical operation when you don’t, drawing just 2.5A on low speed compared to 9A at full power.

Featuring a robust 56-frame motor with 79mm (2″) centre suction and side discharge configuration, the WP250-II fits the same footprint as the WP200-II whilst delivering significantly more power. The wet end design is virtually identical to the Aqua-Flo XP2e series, making it an excellent cost-effective replacement for premium American pump brands including Waterway Executive, HydroAir, and Aqua-Flo pumps.

Current production models feature the latest upgraded ceramic and Viton shaft seals, addressing earlier seal reliability concerns and ensuring extended trouble-free operation. Whether you’re replacing an existing pump or upgrading your spa’s jet system, the WP250-II offers proven LX reliability with the power to satisfy the most demanding hot tub enthusiasts.

✨ Key Features

✅ 2.5HP Dual-Speed Motor – High speed (1.85kW/2900 RPM) for powerful jets, low speed (0.4kW/1450 RPM) for efficient circulation

✅ Superior Flow Rate – 670 L/min on high speed delivers strong, satisfying jet massage performance

✅ Excellent Head Pressure – 16m maximum head on high speed ensures consistent flow even with complex plumbing

✅ 56-Frame Construction – Industry-standard frame size for straightforward replacement and installation

✅ Side Discharge Design – 79mm centre suction with 79mm side discharge for flexible plumbing options

✅ Energy-Efficient Low Speed – Draws only 2.5A during filtration cycles, minimising electricity costs

✅ Upgraded Shaft Seals – Latest ceramic/Viton seal technology for enhanced durability and leak prevention

✅ 2″ Union Connections – Standard buttress thread connections (78mm OD) compatible with most spa plumbing

✅ 4-Core Pre-Wired Cable – Ready for dual-speed control box connection with separate high/low speed circuits

✅ Direct Replacement Capability – Drop-in replacement for Theramax, Jacuzzi, Sundance, and similar pumps

⚙️ Technical Specifications

Motor Specifications

Specification	High Speed	Low Speed
Power Reference	2.5 HP	0.5 HP
Motor Output	1.85 kW	0.4 kW
RPM	2900	1450
Amperage	9.0 A	2.5 A
Voltage	230V	230V
Frequency	50 Hz	50 Hz
Capacitor	40 µF / 450V (dual speed)	–

Hydraulic Performance

Specification	High Speed	Low Speed
Maximum Flow Rate	670 L/min	300 L/min
Maximum Head	16 m	3.5 m

Physical Dimensions

Specification	Value
Length	445 mm
Width	235 mm
Height	305 mm
Frame Type	56 Frame

Wet End Specifications

Specification	Value
Union Size	2″ (inch)
Suction Port	79 mm Centre
Discharge Port	79 mm Side
Thread OD	78 mm (approx)
Impeller Diameter	112 mm
Impeller Vane Gap	11 mm
Impeller Part Number	B351-21
Shaft Seal Type	Type A

🔌 Electrical Requirements

Electrical Specification	Requirement
Supply Voltage	230V
Frequency	50 Hz
Phase	Single Phase
High Speed Amperage	9.0 A
Low Speed Amperage	2.5 A
Capacitor Rating	40 µF / 450V
Cable Type	4-Core (pre-attached)

Wiring Configuration

The pump is supplied with a 4-core cable:

• 2 × Live wires (High and Low speed) – typically Red/Brown or Black
• 1 × Neutral (Common) – typically Blue or White
• 1 × Earth – Green/Yellow

⚠️ IMPORTANT: LX pumps use different wire colours than other brands. Black is typically High speed and Brown is Low speed. Always verify wiring before connection.

⚠️ IMPORTANT ELECTRICAL SAFETY NOTICE:

All electrical work must be carried out by a qualified electrician in accordance with UK wiring regulations (BS 7671). Hot tub installations require RCD protection (30mA) for safety. Never attempt electrical connections yourself unless you are appropriately qualified.

💡 Tip: You may need to swap the cable from your old pump as control box connection types vary between spa brands. Make a note of which wire controls each speed before disconnecting your old pump.

🔗 Compatibility Guide

Frame & Wet End Configuration

Component	Specification
Frame Type	56 Frame
Wet End Size	2″
Suction	79mm Centre
Discharge	79mm Side
Union Thread OD	78mm (approx)
Port Configuration	Centre Suction / Side Discharge

Alternative to Other Pump Brands

The WP250-II wet end is virtually identical to the Aqua-Flo XP2e, making it a cost-effective replacement for:

• Waterway Executive pumps
• HydroAir spa pumps
• Aqua-Flo Flo-Master XP2e
• Discontinued Theramax pumps
• RWA 2.5HP 2 Speed pumps

Important Note – Post-2008 Model

⚠️ IMPORTANT: Post-2008 LX WP and LP pumps have slightly shorter suction (approx. 15mm) and discharge (approx. 30mm) ports compared to pre-2008 models. Hot tubs with very rigid plumbing may require adjustment. The wet end faceplate moulding is also different, and the rear of the wet end casing is “open” rather than enclosed.

🛠️ Installation Requirements

Mounting Specifications

Requirement	Specification
Mounting Position	Horizontal
Base Surface	Solid, level, vibration-dampening
Ventilation Clearance	Minimum 50mm around motor for cooling
Access Clearance	Minimum 150mm for maintenance access

Plumbing Connections

Connection	Size
Suction	2″ / 79mm Centre
Discharge	2″ / 79mm Side
Union Thread	Male Buttress (78mm OD)
Pipe Compatibility	2″ (60mm ID) pipe with unions

Installation Notes

⚠️ Pump must be installed below water level (flooded suction) – This ensures proper priming and prevents air lock issues.

⚠️ Never run the pump dry – Dry running causes immediate seal damage and may destroy the pump. Always ensure water is present before starting.

⚠️ Ensure proper electrical bonding to earth – All metal components must be correctly earthed as per BS 7671 requirements.

⚠️ Check port alignment – Post-2008 models have shorter ports. Verify alignment with existing plumbing before final installation.

💡 Wet End Rotation: The wet end can be installed in three positions (12 o’clock, 3 o’clock, or 9 o’clock) to match your spa’s plumbing unions.

💡 Cable Connection: The pump has four wires – two live (one for each speed), one neutral, and one earth. Note which wire controls each speed when disconnecting your old pump, as colours can vary between manufacturers.

🔧 Maintenance Guide

Routine Maintenance Schedule

Task	Frequency	Notes
Check for water leaks	Monthly	Inspect around seal area and union connections
Inspect union connections	Monthly	Tighten if any looseness detected
Check motor vents	Quarterly	Ensure vents are clear of debris for proper cooling
Inspect mounting bolts	Quarterly	Tighten if loose to reduce vibration
Listen for unusual sounds	Monthly	Early detection of bearing or impeller issues
Check amperage draw	Annually	Should read 9A (high) / 2.5A (low) under load
Verify both speeds operate	Monthly	Test high and low speed function

Warning Signs – When to Replace

Consider replacing your pump if you notice:

• 🔊 Unusual noises such as grinding, screeching, or humming on either speed
• 💧 Water leaking from the mechanical seal area
• ⚡ Motor repeatedly tripping the circuit breaker
• 💨 Significantly reduced water flow from jets
• 🌡️ Motor housing becoming excessively hot to touch
• 🔄 One speed working but not the other (may indicate winding failure)
• ⏱️ Pump struggling to prime or losing prime frequently

Seal Replacement Information

Seal Specification	Detail
Seal Type	Type A
Compatible Seal Kit	LX Pump Shaft Seal – Type A (for JA, LP & WP Series)
Impeller Part Number	B351-21
Impeller Diameter	112mm

⚠️ Replace the seal at the first sign of leakage – A small drip will quickly become a major leak if not addressed promptly. Seal kits are readily available and can extend the pump’s life significantly.

🎯 Ideal Applications

Application	Suitability	Notes
♨️ Large Hot Tub Jet Pump	✅ Excellent	High speed delivers powerful massage jet operation for larger spas
♨️ Spa Filtration Pump	✅ Excellent	Low speed efficiently circulates water during filter cycles
♨️ Combined Jet/Circ Pump	✅ Excellent	Dual-speed design serves both functions in one unit
🛁 Large Whirlpool Bath	✅ Good	Suitable for larger whirlpool installations requiring high flow
♨️ Swim Spa	✅ Excellent	Ideal as primary or booster jet pump in swim spa systems
♨️ Multi-Jet Systems	✅ Excellent	670 L/min flow rate handles extensive jet configurations

Additional Applications

The WP250-II’s robust construction also makes it suitable for:

• 🏭 Circulating weak corrosive liquids (without solid granules)
• ❄️ Workshop fluid circulation for cooling applications
• 💧 Liquid temperature range: +5°C to 60°C

❓ Frequently Asked Questions

Q: What horsepower is this pump?

A: The WP250-II is rated at 2.5HP, with the high speed delivering 1.85kW (approximately 2.5HP) at 2900 RPM and low speed providing 0.4kW (0.5HP) at 1450 RPM.

Q: Will this pump fit my hot tub?

A: This pump has a 56-frame motor with 2″ (79mm) wet end connections – centre suction and side discharge. Check your existing pump’s frame size and wet end configuration for compatibility.

Q: What’s the difference between WP200-II and WP250-II?

A: The WP250-II has a larger motor and impeller (112mm vs 107mm), delivering higher flow (670 vs 620 L/min) and head pressure (16m vs 14m). It draws more current (9A vs 7A on high speed) but fits the same mounting footprint.

Q: What voltage does this pump require?

A: The pump operates on 230V / 50Hz single-phase supply, standard for UK installations. All electrical work must be performed by a qualified electrician.

Q: How does the dual-speed operation work?

A: The pump has two separate live wires – one for high speed and one for low speed. Your spa control system switches between them. High speed runs the jets for massage, low speed runs during heating and filtration.

Q: What size are the plumbing connections?

A: Both suction and discharge ports are 2″ (79mm). The outside diameter of the male threaded wet end connection measures approximately 78mm. Compatible with 2″ (60mm ID) pipe unions.

Q: Can this replace my Aqua-Flo XP2e pump?

A: Yes, the WP250-II wet end is virtually identical to the Aqua-Flo XP2e and serves as a cost-effective direct replacement.

Q: Why does LX use different wire colours?

A: LX pumps use Black for high speed and Brown for low speed, which is reversed from many other brands. Always verify wiring before making connections.

Q: How do I know if my pump needs replacing?

A: Common signs include unusual grinding or screeching noises, water leaking from the seal area, reduced jet flow, the motor tripping the breaker repeatedly, excessive motor heat, or one speed failing while the other works.

Q: What’s the difference between post-2008 and pre-2008 models?

A: Post-2008 pumps have shorter suction ports (approximately 15mm shorter) and discharge ports (approximately 30mm shorter). The wet end faceplate moulding is different and the rear casing is open rather than enclosed. Check alignment with rigid plumbing before installation.

🏆 Why Choose the LX WP250-II

✅ Superior Flow Performance – 670 L/min on high speed delivers powerful, satisfying jet massage for larger spas

✅ Excellent Head Pressure – 16m maximum head ensures consistent flow even with complex plumbing configurations

✅ Dual-Speed Versatility – High speed for powerful jets, low speed for energy-efficient filtration in one pump

✅ Energy Efficient – Low speed draws only 2.5A, reducing electricity costs during filter and heating cycles

✅ Proven Reliability – Established track record with upgraded ceramic/Viton seals for leak-free operation

✅ Cost-Effective Replacement – Directly replaces expensive Aqua-Flo, Waterway, and Jacuzzi pumps at a fraction of the cost

✅ Easy Installation – Standard 56-frame mounting and 2″ connections for straightforward replacement

✅ Comprehensive Spare Parts – Seal kits, impellers, wet ends, capacitors, and other spares readily available

🤝 Why Buy from Parts4Tubs

✅ UK-Based Company – Local support from spa parts specialists who understand your needs

✅ Fast UK Delivery – Quick dispatch to get your hot tub back up and running promptly

✅ Expert Technical Advice – Knowledgeable team available to help with compatibility questions and installation guidance

✅ Competitive Pricing – Great value on genuine quality parts without compromising on reliability

✅ Full Warranty Support – Peace of mind with comprehensive warranty coverage

✅ Easy Returns – Hassle-free returns within 30 days if you’re not completely satisfied

✅ Replacement Parts Available – Seal kits, impellers, capacitors, wet ends, and other spares in stock

✅ Real People, Real Help – Buy from a person, not just the internet. We’re here to help with your spa parts needs

Need Help? Contact our friendly team for compatibility advice or technical support. We’re always happy to assist with finding the right parts for your hot tub.

💪 Summary

The LX WP250-II is a powerful, high-performance 2.5HP dual-speed jet pump designed for larger hot tubs and swim spas demanding superior water flow. With its 56-frame motor delivering an impressive 670 L/min on high speed for intense hydrotherapy massage and just 2.5A draw on low speed for economical circulation, this pump offers exceptional versatility. The 79mm centre suction and side discharge configuration, combined with upgraded ceramic/Viton seals and a larger 112mm impeller, makes it an excellent direct replacement for Aqua-Flo XP2e, Waterway Executive, and premium Jacuzzi pumps. Whether you’re upgrading for more power or replacing an existing pump, the WP250-II delivers proven LX reliability with the performance to exceed expectations.

The hot tub industry doesnt make it easy for you when you are trying to match up the size of the unions (the part that screws your pipe work onto the pumps) Below you can see the physical sizes of the collars, and how they relate to the actual union size you need. So a measurement of 2.5", edge to edge on the collar of the pump is actually a 1.5" union - confusing - absolutely! If you are not sure, give me a shout!

How do I Replace a Hot Tub Pump?

Here's a general step-by-step guide on how to replace a hot tub pump. Keep in mind that the specific steps may vary depending on your hot tub's make and model, so it's essential to consult your hot tub's manual for model-specific instructions. If you're not comfortable with this procedure, it's a good idea to seek professional assistance.

Materials You'll Need:

• Replacement pump
• Pipe wrench
• Adjustable wrench
• Screwdriver
• Pipe sealant (thread tape or plumber's putty)
• PVC primer and cement (if you have PVC plumbing)
• Teflon tape (for threaded connections)

Procedure:

1. Turn Off the Power: Before you begin, ensure the hot tub's power supply is turned off at the circuit breaker or disconnect switch. Safety should always be a priority when working with electrical components.
2. Drain the Hot Tub: If your hot tub is not already empty, you'll need to drain it. Follow your hot tub's manual or manufacturer's instructions for proper draining. (You might not need to do this if you can lock the pump off with the gate valves)
3. Locate the Pump: Identify the location of the existing pump in your hot tub. It's usually located near the equipment area or in a designated pump compartment.
4. Disconnect the Electrical Wiring: Carefully disconnect the electrical wiring from the old pump. This typically involves removing the electrical conduit cover, unscrewing wire nuts, and disconnecting the wires from the terminals. Be sure to note the wire connections or take a picture for reference when connecting the new pump.
5. Disconnect the Plumbing: Depending on your hot tub's plumbing setup, you'll need to disconnect the plumbing connections to the pump. Use a pipe wrench or adjustable wrench to loosen and remove the fittings. Be prepared for some water spillage when disconnecting the plumbing.
6. Remove the Old Pump: Once the electrical and plumbing connections are detached, carefully remove the old pump from its mounting position. Some pumps may be secured with mounting brackets or bolts.
7. Prepare the New Pump: If the new pump is not pre-assembled, you may need to attach fittings, unions, or adapters to match your hot tub's plumbing. Ensure that you use the appropriate sealant or Teflon tape on threaded connections to prevent leaks.
8. Mount the New Pump: Position the new pump in the same location as the old one and secure it in place using the mounting brackets or bolts.
9. Reconnect Plumbing: Reconnect the plumbing to the new pump, ensuring that all connections are tight and secure. If your hot tub uses PVC plumbing, use PVC primer and cement to bond the connections properly.
10. Reconnect Electrical Wiring: Reconnect the electrical wiring to the new pump, following the notes or pictures you took earlier. Make sure all wires are properly connected and secure.
11. Turn On the Power: Restore power to the hot tub by switching on the circuit breaker or reconnecting the disconnect switch.
12. Test the Pump: Turn on the hot tub's pump to ensure that it's working correctly. Check for any signs of leaks or irregularities in the plumbing connections.
13. Refill the Hot Tub: Once you've confirmed that the new pump is functioning properly, refill the hot tub with water.
14. Check for Leaks: Inspect the plumbing connections for any leaks. If you find any, turn off the pump, drain the tub again, and reseal the connections as needed.
15. Monitor: Keep an eye on the pump and plumbing for the next few days to ensure everything is functioning correctly and that there are no further issues.

Remember that this is a general guideline, and the specific steps may vary based on your hot tub's design. If you're unsure or uncomfortable with any aspect of this process, please do get in touch, happy to help.

How do I know what size hot tub pump I have?

Determining the size of your hot tub pump is an important step when it comes to maintenance or replacement. To find out the size of your hot tub pump, follow these steps:

1. Check the Manual: The easiest way to determine the size of your hot tub pump is to consult the owner's manual or user documentation that came with your hot tub. The manual typically contains detailed information about the specifications and components of your hot tub, including the pump.
2. Look at the Pump Housing: If you don't have access to the manual or it doesn't provide the information you need, inspect the pump itself. Most hot tub pumps have a label or plate on the pump housing that displays essential details, including the pump's model number, manufacturer, and specifications. You can then send that to me or Google it.
3. Measure the Pump: If the label is missing or damaged, you can measure the pump's dimensions. Measure the diameter of the pump's wet end (the part where the water flows) and the length of the wet end. These measurements can help identify the size and capacity of the pump.
4. Consult the Manufacturer: If you can't find the information on the pump or in the manual, contact the hot tub manufacturer or a reputable dealer. Provide them with your hot tub's model and serial number, and they should be able to identify the correct pump size for your specific hot tub.
5. Online Research: You can also search online using the pump's model number or hot tub's make and model. Many manufacturers provide detailed information about their products on their websites, and you may find specifications for your pump model.

Once you have determined the size and specifications of your hot tub pump, you can proceed with maintenance, repairs, or replacement if necessary. Keep in mind that replacing a hot tub pump with the same size and capacity as the original is crucial to ensure proper water circulation and filtration in your hot tub. If you're unsure about any aspect of this process, get in touch, always happy to help.