♨️ LX EA390 Spa Pump – 1.2HP Single Speed Circulation Pump

Enhanced Circulation Power with Exceptional Head Pressure

💦 Product Overview

The LX EA390 is a powerful single-speed 1.2HP circulation pump designed for hot tubs and whirlpool baths requiring enhanced water movement and pressure. Featuring an optional air switch for convenient manual operation, this pump delivers impressive performance with a maximum head of 15 metres – making it ideal for systems with multiple jets or complex plumbing configurations.

With a 0.90kW motor drawing 4.6A and operating at 2,900 RPM, the EA390 provides a maximum flow rate of 335 L/min combined with exceptional head pressure. This makes it particularly well-suited for Chinese-manufactured spas featuring 8-12 nozzles, where sustained pressure across multiple outlets is essential for proper jet performance.

The centre discharge design with self-draining capability simplifies maintenance, whilst the thermally protected motor ensures safe operation during extended use. Measuring 380mm × 160mm × 205mm with standard 1.5-inch plumbing connections, the EA390 offers a step up in power from the EA350 whilst maintaining the same compact footprint.

⭐ Key Features

✅ 1.2HP Single-Speed Motor – 0.90kW output provides enhanced circulation power

✅ Exceptional Head Pressure – 15m maximum head for multi-jet systems

✅ High Flow Rate – Maximum 335 L/min for thorough water circulation

✅ 2,900 RPM Operation – Consistent high-speed performance

✅ Centre Discharge Design – Optimised water outlet positioning

✅ Self-Draining Capability – Simplified maintenance and winterisation

✅ Thermally Protected Motor – Built-in overheating protection for safe continuous operation

✅ Optional Air Switch – Manual control for standalone operation

✅ Multi-Nozzle Compatible – Ideal for spas with 8-12 jets

✅ Compact Dimensions – 380mm × 160mm × 205mm fits most configurations

⚙️ Technical Specifications

Motor Specifications

Specification	Value
Power Reference	1.2 HP
Motor Output	0.90 kW
Speed Type	Single Speed (1 Speed)
RPM	2,900
Amperage	4.6 A
Motor Protection	Thermally protected

Hydraulic Performance

Specification	Value
Maximum Flow Rate	335 L/min
Maximum Head	15 m

Physical Dimensions

Specification	Value
Length	380 mm
Width	160 mm
Height	205 mm
Plumbing Size	1.5″

Design Features

Feature	Specification
Discharge Configuration	Centre discharge
Drainage	Self-draining design
Control Option	Optional air switch
Pump Type	Circulation Pump

⚡ Electrical Requirements

Electrical Specification	Requirement
Amperage	4.6 A
Motor Protection	Thermally protected

⚠️ 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: The moderate 4.6A draw provides a good balance between power and efficiency. The optional air switch allows standalone manual operation without requiring a spa control system.

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💧 Hydraulic Performance

Performance Metric	Value
Maximum Flow Rate	335 L/min
Maximum Head	15 m
Operating Speed	2,900 RPM

💡 Performance Note: The impressive 15m maximum head is a standout feature of the EA390, providing significantly more pressure capability than the EA350 (11m). This makes it ideal for hot tubs with complex plumbing runs or multiple jet outlets where sustained pressure is critical.

🔗 Compatibility Guide

Plumbing Configuration

Component	Specification
Suction Port	1.5″
Discharge Port	1.5″
Discharge Design	Centre discharge

Compatible Hot Tub Systems

The LX EA390 is suitable for:

• ♨️ Chinese-manufactured spas with 8-12 nozzles
• ♨️ Hot tubs requiring enhanced head pressure
• ♨️ Systems with complex plumbing configurations
• 🛁 Whirlpool bath systems with multiple outlets

🛠️ Installation Requirements

Mounting Specifications

Requirement	Specification
Dimensions (L × W × H)	380mm × 160mm × 205mm
Base Surface	Solid, level, vibration-dampening
Ventilation	Ensure adequate clearance for motor cooling

Plumbing Connections

Connection	Size
Suction	1.5″
Discharge	1.5″ (centre)

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. The thermal protection will help, but prevention is essential.

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

⚠️ Centre discharge orientation – Ensure the pump is positioned to allow proper water outlet through the centre discharge port.

💡 Self-Draining Benefit: The self-draining design allows water to naturally evacuate from the pump body when the system is shut down, making winterisation and maintenance easier.

💡 Air Switch Option: If ordering with the optional air switch, this allows manual on/off control without requiring connection to a spa control system – ideal for whirlpool bath installations.

💡 Multi-Jet Applications: The 15m head makes this pump particularly effective for systems with 8-12 jets, maintaining consistent pressure across all outlets.

🔧 Maintenance Guide

Routine Maintenance Schedule

Task	Frequency	Notes
Check for water leaks	Monthly	Inspect around seal area and connections
Inspect plumbing connections	Monthly	Tighten if any looseness detected
Check motor vents	Quarterly	Ensure vents are clear of debris for proper cooling
Inspect mounting	Quarterly	Tighten bolts if loose to reduce vibration
Listen for unusual sounds	Monthly	Early detection of bearing or impeller issues
Check amperage draw	Annually	Should read approximately 4.6A under load
Verify thermal protection	Annually	Ensure motor shuts down if overheating occurs
Test air switch (if fitted)	Quarterly	Verify reliable on/off operation

Warning Signs – When to Replace

Consider replacing your pump if you notice:

• 🔊 Unusual noises such as grinding, screeching, or humming
• 💧 Water leaking from the mechanical seal area
• ⚡ Motor repeatedly tripping the circuit breaker
• 💨 Significantly reduced water flow or jet pressure
• 🌡️ Motor housing becoming excessively hot despite thermal protection
• ⏱️ Pump struggling to start or humming without turning
• ❄️ Failure of self-draining function (water remaining trapped)

🎯 Ideal Applications

Application	Suitability	Notes
♨️ Multi-Jet Hot Tubs (8-12 jets)	✅ Excellent	Designed for this application
♨️ High-Resistance Plumbing Systems	✅ Excellent	15m head handles demanding configurations
♨️ Spa Circulation/Filtration	✅ Excellent	Powerful continuous circulation
♨️ Heating Circuit Pump	✅ Excellent	Reliable water movement for heater
🛁 Whirlpool Bath (Multi-Outlet)	✅ Excellent	Sustained pressure across outlets
♨️ Single Jet Systems	⚠️ May be oversized	Consider EA350 or DH1.0

❓ Frequently Asked Questions

Q: What horsepower is this pump?

A: The EA390 is rated at 1.2HP with a 0.90kW motor output.

Q: What is the flow rate and head pressure?

A: The pump delivers a maximum flow rate of 335 L/min with an impressive maximum head of 15 metres.

Q: What size are the plumbing connections?

A: Both suction and discharge ports are 1.5-inch connections.

Q: What is the amperage draw?

A: The pump draws 4.6A during operation.

Q: What does “centre discharge” mean?

A: Centre discharge means the water outlet port is positioned in the centre of the wet end, rather than offset to one side.

Q: What is the self-draining feature?

A: The self-draining design allows water to naturally evacuate from the pump body when the system is shut down, reducing the risk of freeze damage and simplifying winterisation procedures.

Q: What does “thermally protected” mean?

A: The motor includes built-in thermal protection that automatically shuts the motor down if it begins to overheat, protecting against damage from blockages, dry running, or prolonged high-temperature operation.

Q: What is the optional air switch for?

A: The optional air switch allows manual on/off control of the pump without requiring a spa control system. It’s activated by pressing a pneumatic button, making it ideal for whirlpool bath installations where simple manual control is preferred.

Q: How many jets can this pump support?

A: The EA390 is designed for spas with 8-12 nozzles, providing sufficient flow and pressure to maintain performance across multiple outlets.

Q: How does this compare to the EA350?

A: The EA390 is more powerful: 1.2HP vs 1.0HP, 0.90kW vs 0.75kW, 4.6A vs 3.8A. Most importantly, the EA390 delivers 15m maximum head compared to 11m for the EA350. Flow rates are similar (335 vs 320 L/min). Choose the EA390 for systems with more jets or higher resistance plumbing.

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 water flow or jet pressure, the motor tripping the breaker, or the pump struggling to start.

🏆 Why Choose the LX EA390

✅ Enhanced Power – 1.2HP / 0.90kW for demanding circulation applications

✅ Exceptional Head Pressure – 15m maximum head for multi-jet systems

✅ Multi-Nozzle Performance – Ideal for spas with 8-12 jets

✅ Self-Draining Design – Simplified maintenance and winterisation protection

✅ Thermally Protected Motor – Built-in overheating protection for peace of mind

✅ Optional Air Switch – Manual control capability for standalone operation

✅ Same Footprint as EA350 – 380mm × 160mm × 205mm dimensions

✅ Centre Discharge Design – Optimised water outlet configuration

🤝 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, capacitors, 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

✨ Summary

The LX EA390 is a powerful 1.2HP single-speed circulation pump delivering enhanced water movement with exceptional head pressure for demanding hot tub applications. With its 0.90kW motor providing a maximum flow rate of 335 L/min and impressive 15m head at 4.6A draw, this pump excels in systems with 8-12 jets or complex plumbing requiring sustained pressure. The centre discharge design with self-draining capability, thermally protected motor, and optional air switch for manual control make the EA390 a reliable and versatile choice. Featuring 380mm × 160mm × 205mm dimensions and standard 1.5-inch plumbing connections, this pump is ideal for Chinese-manufactured spas and whirlpool bath installations requiring powerful, dependable circulation with outstanding pressure performance.

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.