♨️ LX LP250 Spa Pump – 2.5 HP Single Speed Jet Pump

Maximum power for demanding multi-jet hydrotherapy systems

💧 Product Overview

The LX LP250 is a high-performance 2.5 HP single-speed jet pump engineered for hot tubs and spas that demand exceptional water flow and powerful jet performance. Delivering an impressive maximum flow rate of 600 litres per minute with 1.85 kW of robust motor power, this pump is designed for larger spas and swim spas with multiple jet zones requiring serious hydrotherapy capability.

As a premium member of the acclaimed LP series, the LP250 serves as a powerful booster pump delivering high-volume water flow through massage jets for an intense, therapeutic bathing experience. The centre suction with side discharge configuration provides installation flexibility whilst the thermally protected motor ensures safe, reliable operation even under continuous demanding use.

The LP series has established itself as the preferred replacement for discontinued Theramax pumps in Jacuzzi and Sundance spas, and the LP250 offers a cost-effective alternative to premium American pumps including Waterway Executive, HydroAir, and Aqua-Flo XP2e models. With upgraded ceramic/Viton shaft seals, a finned motor body for superior heat dissipation, and robust construction throughout, the LP250 delivers professional-grade reliability that spa technicians and owners trust worldwide.

This pump is specifically designed for post-2008 spa systems and represents the ideal choice for larger installations where maximum jet power is essential.

⭐ Key Features

• ✅ 2.5 HP Motor Power – 1.85 kW output delivers maximum water flow for powerful multi-jet systems
• ✅ High Flow Rate – Exceptional 600 L/min maximum flow for intense jet action across numerous nozzles
• ✅ Single Speed Operation – Reliable 2900 RPM motor for consistent, dependable high-power performance
• ✅ 48 Frame Motor – European-style finned body design for efficient heat dissipation
• ✅ 2″ Plumbing Connections – 79mm centre suction × 79mm side discharge with buttress thread unions
• ✅ Thermally Protected Motor – Built-in thermal protection prevents overheating damage
• ✅ Upgraded Shaft Seal – Ceramic/Viton Type A mechanical seal for superior longevity
• ✅ Pre-Wired with AMP Plug – Factory-fitted 3-core AMP cable for straightforward installation
• ✅ Rotatable Wet End – 4-bolt wet end repositions to match any plumbing configuration
• ✅ Corrosion Resistant – Suitable for salt water and weak corrosive liquid applications
• ✅ Multi-Brand Compatible – Direct replacement for Jacuzzi, Sundance, Waterway, and Aqua-Flo pumps
• ✅ 1 Year Manufacturer Warranty – Standard warranty with extended options available

🔧 Technical Specifications

Specification	Value
Pump Type	Single Speed Jet Pump / Booster Pump
Motor Power	2.5 HP / 1.85 kW
Speed Settings	Single Speed
Flow Rate (Max)	600 L/min
Maximum Head	15.5 m
Voltage	220-240 V
Frequency	50 Hz
Amperage	8.0 A
Motor Speed	2900 RPM
Frame Type	48F (European Finned Body)
Wet End	2 inch
Discharge Port	79 mm (2 inch) – Side
Suction Port	79 mm (2 inch) – Centre
Union Thread	78 mm outer thread / 60 mm internal (Male Buttress)
Port Position	Centre suction / Side discharge
Seal Type	Type A Mechanical Shaft Seal (Ceramic/Viton)
Capacitor	40 µF
Impeller Part No.	B351-21
Impeller Diameter	112 mm
Impeller Vane Gap	11 mm
Dimensions (L×W×H)	385 × 200 × 220 mm
Plug Type	3-Core AMP
Warranty	1 year manufacturer

⚡ Electrical Requirements

Electrical Spec	Requirement
Supply Voltage	220-240 V
Frequency	50 Hz
Phase	Single Phase
Full Load Amps	8.0 A
Capacitor	40 µF
Thermal Protection	Built-in thermal protector
Cable Supplied	3-Core with AMP plug

⚠️ IMPORTANT:

All electrical work must be carried out by a qualified electrician in accordance with UK wiring regulations (BS 7671). Hot tubs require RCD protection (30mA). Ensure the circuit breaker is appropriately rated for the pump’s amperage draw. The pump must be properly earthed before operation.

🔄 Compatibility Guide

Frame & Connection Dimensions:

Component	Specification
Frame Type	48F (European Finned Body)
Wet End Size	2 inch
Union Thread	78 mm outer / 60 mm internal (Male Buttress)
Suction Port	79 mm centre
Discharge Port	79 mm side

This Pump Configuration:

• 📍 Frame: 48F European-style finned body motor
• 📍 Wet End: 2 inch with rotatable positioning (4-bolt)
• 📍 Discharge: 79 mm (2″) side discharge
• 📍 Suction: 79 mm (2″) centre suction
• 📍 Impeller: 112 mm diameter (B351-21)

Factory Fitted To:

• AMC Winer Spas
• Aegean Spas
• Bluewhale Spa
• HotSpring (Watkins)
• Hydropool
• Jacuzzi
• Leisure Bay
• MAAX Spas
• Marquis Spa
• Signature Spas
• Spaform
• Spa Serve
• Sundance Spas
• Trinity Spas

Direct Replacement For:

• Jacuzzi Theramax pumps (discontinued)
• Sundance Theramax pumps (discontinued)
• Aqua-Flo XP2e 2.5 HP
• Waterway Executive 2.5 HP
• HydroAir 2.5 HP
• RWA 2.5HP Single Speed
• Koller 2.5 HP
• Balboa Sta-Rite DuraJet 2.5 HP

OEM Part Numbers:

• Watkins/HotSpring/Caldera: 73028
• Spanet: XS-30 or XS-30S

⚠️ IMPORTANT NOTE – Pre-2008 Pumps:

Older (pre-2008) LP & WP pumps and wet ends are manufactured with a shorter section (approx. 15mm) and discharge port (approx. 30mm). If replacing a pre-2008 version (wet end labelled B351-03) on a spa with rigid plumbing, the newer version may not align with existing pipework. In these cases, the Waterway Executive equivalent may provide a better fit.

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🛠️ Installation Requirements

Mounting:

Requirement	Specification
Mounting Position	Horizontal (standard)
Base	Solid, level, vibration-dampening surface
Ventilation	Adequate clearance around finned motor body for cooling
Access	Allow space for maintenance and seal replacement

Plumbing:

Connection	Size
Suction	79 mm (2 inch) centre
Discharge	79 mm (2 inch) side
Union Type	2.0 inch buttress thread (78mm outer)
Union Internal Diameter	60 mm

Installation Notes:

• ⚠️ Pump must be installed below water level (flooded suction) for proper priming
• ⚠️ Never run pump dry – causes immediate seal damage and motor overheating
• ⚠️ Ensure proper bonding to earth in accordance with BS 7671
• ⚠️ The wet end can be rotated by removing the 4 motor screws to suit your plumbing layout (left, right, top-left, or top-right discharge positions)
• ⚠️ Check discharge port alignment with existing plumbing before installation
• 💡 Use new unions and O-rings when replacing an existing pump
• 💡 The existing cable from your old pump can often be reused if in good condition
• 💡 Pump unions and O-rings included – for 2-inch pipes (60mm internal diameter)

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⚙️ Maintenance Guide

Routine Maintenance:

Task	Frequency	Notes
Check for leaks	Monthly	Inspect around seal and union connections
Inspect unions	Monthly	Tighten if needed, replace O-rings if damaged
Clean strainer/filter	As needed	Remove debris to maintain flow
Check amperage	Annually	Should match 8.0 A rating
Inspect motor vents	Quarterly	Keep finned body clear of debris for cooling
Check mounting bolts	Quarterly	Tighten if loose to reduce vibration
Listen for unusual noise	Each use	Early detection prevents major failures

Warning Signs – Replace Pump If:

• Unusual noise (grinding, screeching, or humming without rotation)
• Water leaking from mechanical seal area
• Motor trips circuit breaker repeatedly
• Noticeably reduced water flow or jet pressure
• Motor overheating or burning smell
• Visible corrosion on motor housing

Seal Replacement:

• 📍 Seal Type: Type A Mechanical Shaft Seal (Ceramic/Viton upgrade)
• ⚠️ Replace seal at first sign of leakage – running a leaking pump damages bearings

Spare Parts Available:

• Mechanical seal (Type A)
• Motor bearings (6203Z & 6204Z set)
• Capacitor (40 µF)
• Impeller (B351-21, 112mm diameter)
• Complete wet end assembly (2.5HP)
• Cooling fan (156mm)
• Fan cover
• Pump unions and O-rings (70mm for unions, 150mm for wet end face plate)
• Drain plugs and bleed valves
• Face plate screws (M5 x 15mm)

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🎯 Ideal Applications

Application	Suitability	Notes
♨️ Hot tub jet pump	Excellent	Ideal for larger spas with multiple jet zones
♨️ Spa booster pump	Excellent	Maximum flow for demanding multi-jet systems
🛁 Whirlpool bath	Good	Suitable for large commercial whirlpool installations
💪 Swim spa jets	Excellent	Powers high-volume jet systems in swim spas

Additional Applications:

• Water circulation for fish ponds (including salt water and seawater)
• Weak corrosive liquid circulation (without solid particles)
• Workshop fluid circulation and cooling systems

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❓ Frequently Asked Questions

Q: What horsepower is this pump?

A: The LX LP250 is rated at 2.5 HP (1.85 kW), delivering up to 600 litres per minute maximum flow rate and 15.5 metres maximum head pressure.

Q: Will this fit my hot tub?

A: This pump has a 48F frame with 2 inch wet end and 79mm centre suction / side discharge ports. It’s designed for post-2008 spa systems. Check your existing pump’s frame size and port configuration for compatibility. The LP250 is factory-fitted to numerous brands including Jacuzzi, Sundance, HotSpring, MAAX, Cascade, and many Chinese-manufactured spas.

Q: What voltage does this pump require?

A: 220-240V / 50Hz single phase supply drawing 8.0 amps at full load. All electrical installation must be carried out by a qualified electrician in accordance with BS 7671.

Q: Is this a single or dual speed pump?

A: This is a single speed pump running at 2900 RPM. If you require a dual speed pump, consider the LX WP250-II which offers both high and low speed operation.

Q: What size are the ports?

A: Suction: 79mm (2 inch) centre. Discharge: 79mm (2 inch) side. Union connections use 78mm outer thread with 60mm internal diameter.

Q: Can this replace my Theramax pump?

A: Yes, the LP series is the recommended replacement for discontinued Theramax pumps used in Jacuzzi and Sundance spas, offering comparable performance at a more economical price.

Q: Can this replace an Aqua-Flo XP2e or Waterway Executive?

A: Yes, the LP250 has similar alignment of inlet and outlet ports to both the Aqua-Flo XP2e and Waterway Executive, making it a cost-effective replacement option. The wet ends are almost identical.

Q: What is the difference between the LP200 and LP250?

A: The LP250 delivers 2.5 HP (1.85 kW) compared to the LP200’s 2.0 HP (1.5 kW). The LP250 provides higher flow rate (600 L/min vs 535 L/min), greater head pressure (15.5m vs 13m), and uses a larger 40µF capacitor (vs 30µF). Choose the LP250 for larger spas or more demanding jet systems.

Q: What warranty is included?

A: The manufacturer provides a 1 year standard warranty. Extended warranty options are available through Parts4Tubs.

Q: Can I rotate the wet end to match my plumbing?

A: Yes, the wet end is attached with 4 motor screws. Removing these allows you to rotate the wet end to suit your plumbing layout – options include standard (top), left, top-left, right, or top-right discharge positions.

Q: My spa was made before 2008 – will this fit?

A: Pre-2008 LP/WP pumps have slightly different dimensions (shorter section and discharge port). If your spa has rigid plumbing, the newer LP250 may not align perfectly. In these cases, a Waterway Executive equivalent may provide a better fit, or plumbing modifications may be required.

🏆 Why Choose the LX LP250

• ✅ Maximum Power – 2.5 HP motor delivers exceptional jet performance for larger spas
• ✅ Superior Flow Capacity – 600 L/min maximum flow for intense multi-zone hydrotherapy
• ✅ Proven Reliability – One of the most trusted pumps across the European hot tub market
• ✅ Cost-Effective Replacement – Economical alternative to Theramax, Aqua-Flo, Waterway, and HydroAir pumps
• ✅ Wide Compatibility – Direct fit for Jacuzzi, Sundance, HotSpring, and many other brands
• ✅ Upgraded Components – Ceramic/Viton seal and finned motor for enhanced durability
• ✅ Flexible Installation – Rotatable wet end suits various plumbing configurations
• ✅ Comprehensive Spares – All replacement parts readily available

🤝 Why Buy From Parts4Tubs

• ✅ UK-based company with local customer support
• ✅ Fast UK delivery options available
• ✅ Expert advice from experienced spa specialists
• ✅ Competitive pricing on genuine LX pumps
• ✅ Full manufacturer warranty support
• ✅ Easy returns within 30 days
• ✅ Replacement seals, impellers, bearings, and spare parts stocked
• ✅ Compatibility guidance for your specific hot tub model

✨ Summary

The LX LP250 is a powerful, dependable 2.5 HP single-speed jet pump delivering exceptional 600 L/min flow rate for the most demanding hydrotherapy applications. As the high-performance choice in the LP series, it’s ideal for larger spas, swim spas, and multi-zone jet systems requiring maximum water volume. A proven replacement for Jacuzzi and Sundance Theramax pumps, and a cost-effective alternative to Aqua-Flo XP2e, Waterway Executive, and HydroAir models, the LP250 offers professional-grade performance at outstanding value. With upgraded ceramic/Viton seals, thermally protected motor, rotatable wet end, and compatibility with dozens of major spa brands, the LP250 is the smart choice for owners seeking serious hydrotherapy power. Backed by manufacturer warranty and comprehensive spare parts availability, this pump delivers reliable, powerful performance for years of relaxing spa enjoyment.

Installation and Maintenance

The LX LP250 is designed for straightforward installation, featuring standard 2-inch plumbing connections and a pre-wired electrical setup. While the process is relatively simple, I always recommend professional installation to ensure optimal performance and safety.

To keep your LX LP250 running at its best, consider these maintenance tips:

1. Regularly check for unusual noises or vibrations
2. Maintain proper water chemistry to prevent corrosion
3. Clean the pump basket frequently
4. Periodically inspect seals and O-rings for signs of wear

Why Choose the LX LP250?

1. Superior Performance: The 2.5HP motor provides ample power for most hot tub configurations.
2. Reliability: LX has a strong reputation for producing durable, long-lasting pumps.
3. Quiet Operation: Enjoy your hot tub experience without disruptive pump noise.
4. Energy Efficiency: The single-speed design helps manage energy consumption.
5. Versatile Application: Excellent as both a main pump and a booster pump.

Conclusion

The LX LP250 Pump is more than just a replacement part – it’s an investment in your hot tub’s performance and your overall relaxation experience. With its powerful 2.5HP motor, dependable operation, and broad compatibility, it stands out as a top choice for discerning hot tub owners.

If you have any questions about the LX LP250 or need advice on whether it’s the right fit for your specific hot tub model, don’t hesitate to reach out. I’m here to help you make an informed decision based on your unique needs and preferences.

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.