💧 LX JA100 Circulation Pump with Optional Air Switch – 1.0 HP Single Speed

Whisper-Quiet Circulation for Efficient Spa Filtration and Heating

♨️ Product Overview

The LX JA100 is a dependable 1.0 HP single-speed circulation pump specifically designed for hot tubs, spas, and whirlpool bath systems. Manufactured by LX (Lingxiao), a globally recognised leader in spa pump technology, the JA100 delivers a maximum flow rate of 320 litres per minute with an 11-metre head pressure, providing excellent performance for filtration and heating circulation duties.

Featuring a distinctive centre discharge wet end with low-positioned suction port, this pump offers self-draining capability when the motor shuts off, protecting both the pump and your system from potential damage. The thermally protected motor operates with minimal noise and vibration, ensuring peaceful enjoyment of your spa experience. The built-in optional air switch facility makes the JA100 particularly popular for whirlpool bath installations requiring manual on/off control.

Widely fitted to hot tubs from brands including AMC Winer Spa, Spa Serve, MAAX, Cascade, Trinity, and Monalisa, the JA100 has become a preferred choice across the European market for its exceptional reliability and value.

✨ Key Features

✅ 1.0 HP Motor Power – Delivers 0.75 kW of efficient, consistent circulation power

✅ High Flow Performance – Maximum 320 L/min flow rate with 11m head pressure

✅ Single Speed Operation – Reliable 2,900 RPM motor for continuous filtration duty

✅ Self-Draining Design – Low-positioned centre suction enables automatic draining when pump stops

✅ Whisper-Quiet Motor – Engineered for low noise and minimal vibration operation

✅ 1.5″ Plumbing Connections – Universal suction and discharge ports with 62mm OD threads

✅ Thermal Overload Protection – Built-in thermal protector extends motor lifespan

✅ Air Switch Compatible – Built-in facility for optional pneumatic button control

✅ 15µF Capacitor Included – Ensures reliable motor starting every time

✅ Upgraded Ceramic/Viton Seal – Latest specification seal for improved longevity

✅ Aluminium Motor Frame – Robust construction for effective heat dissipation

⚙️ Technical Specifications

Specification	Value
Pump Type	Circulation Pump
Motor Power	1.0 HP / 0.75 kW
Speed Settings	Single Speed
Flow Rate (Maximum)	320 L/min
Maximum Head	11 m
Voltage	230V
Frequency	50 Hz
Amperage	3.8 A
Motor Speed	2,900 RPM
Wet End Configuration	1.5 inch Centre Discharge
Discharge Port	1.5 inch (62mm OD thread)
Suction Port	1.5 inch (62mm OD thread)
Port Position	Centre Discharge (Top)
Dimensions (L × W × H)	350 × 160 × 205 mm
Capacitor	15 µF
Seal Type	Ceramic/Carbon/Viton Mechanical Seal
IP Rating	IP55
Thermal Protection	Built-in Thermal Overload Protector
Motor Frame	Aluminium

🔌 Electrical Requirements

Electrical Specification	Requirement
Supply Voltage	230V
Frequency	50 Hz
Phase	Single Phase
Full Load Amperage	3.8 A
Capacitor Rating	15 µF
Cable Supply	Plain cable attached (swap from existing pump if connector differs)

⚠️ IMPORTANT ELECTRICAL SAFETY NOTICE:

All electrical work must be carried out by a qualified electrician in accordance with UK wiring regulations (BS 7671). Hot tubs and spas require RCD protection (30mA) for safety. Never attempt electrical installation yourself unless you are a qualified professional. Incorrect installation may invalidate warranty and poses serious safety risks.

🔗 Compatibility Guide

Plumbing Specifications

Connection	Size	Details
Suction Port	1.5 inch	62mm OD threaded connection
Discharge Port	1.5 inch	62mm OD threaded connection
Wet End Style	Centre Discharge	Top-positioned, self-draining design

This Pump Features:

📍 Wet End: 1.5 inch centre discharge
📍 Discharge: 1.5 inch (62mm OD threaded) – Top position
📍 Suction: 1.5 inch (62mm OD threaded) – Low position
📍 Discharge Orientation: Adjustable left or right

Compatible Hot Tub Brands:

✅ AMC Winer Spa
✅ Spa Serve
✅ MAAX
✅ Cascade
✅ Trinity
✅ Monalisa
✅ Most Chinese manufactured spas

Suitable Replacement For:

The LX JA100 is a direct replacement for several older pump models:

• LX DXD 310 pumps
• LX EA350 pumps
• LX TDA100 pumps
• LX DH 1.0 pumps
• Rocoi LDPB-140B pumps

💡 Note: The JA100 motor mount design may differ slightly from older models. In most cases, it serves as a reliable replacement with minimal or no replumbing required.

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🛠️ Installation Requirements

Mounting Specifications

Requirement	Specification
Mounting Position	Horizontal
Base	Solid, level, vibration-dampening surface
Ventilation	Adequate clearance for motor cooling
Access	Sufficient space for maintenance and seal replacement
Operating Temperature	5°C to 50°C ambient

Plumbing Connections

Connection	Size	Type
Suction	1.5 inch	62mm OD threaded
Discharge	1.5 inch	62mm OD threaded
Fittings Supplied	Yes	1.5″ outlet fittings with 48mm inner diameter

Installation Notes

⚠️ Pump must be installed below water level (flooded suction) to ensure proper priming

⚠️ Never run the pump dry – this causes immediate seal damage and potential motor failure

⚠️ Ensure proper electrical bonding to earth in accordance with BS 7671

⚠️ The wet end position is adjustable – unscrew the four motor bolts to rotate the pump body for left or right discharge orientation

⚠️ Cable supplied attached to pump – you may need to swap the cable from your existing pump if the control box connector type differs

⚠️ Do not exceed 50°C external ambient temperature during operation

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🔧 Maintenance Guide

Routine Maintenance Schedule

Task	Frequency	Notes
Check for leaks	Monthly	Inspect around mechanical seal and union connections
Inspect unions	Monthly	Tighten if necessary – do not overtighten
Clean strainer/filter	As needed	Remove debris to maintain flow rate
Check amperage draw	Annually	Should match 3.8A rating – higher indicates wear
Inspect motor vents	Quarterly	Keep cooling vents clear of debris
Check mounting bolts	Quarterly	Tighten if vibration has caused loosening
Verify flow rate	Annually	Reduced flow may indicate impeller wear

Warning Signs – Replace Pump If:

⚠️ Unusual noise such as grinding, screeching, or humming
⚠️ Water leaking from the mechanical seal area
⚠️ Motor trips the circuit breaker repeatedly
⚠️ Significantly reduced water flow despite clean filters
⚠️ Motor overheating or shutting down on thermal protection
⚠️ Visible corrosion or damage to the wet end

Seal Replacement Information

Seal Specification	Details
Seal Type	Ceramic/Carbon/Viton Mechanical Seal
Compatible Seal	LX Type A Seal (2008 onwards)
Replacement Indication	Water leaking from pump shaft area

💡 Tip: Our stock of JA100 pumps feature the latest upgraded ceramic/Viton shaft seal kits, addressing the premature seal failure issues seen in earlier models.

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🛁 Ideal Applications

Application	Suitability	Notes
♨️ Hot Tub Circulation	Excellent	Primary use – filtration and heating
♨️ Spa Filtration	Excellent	Continuous duty rated for 24/7 operation
🛁 Whirlpool Bath	Excellent	Compatible with air switch for manual control
♨️ Swim Spa Circulation	Good	Suitable for circulation duties
🛁 Hydro Massage Bath	Good	Can power massage functions in smaller baths

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❓ Frequently Asked Questions

Q: What horsepower is the LX JA100 pump?

A: The LX JA100 is a 1.0 HP (0.75 kW) circulation pump with a single-speed motor running at 2,900 RPM.

Q: Will this pump fit my hot tub?

A: The JA100 features 1.5-inch suction and discharge ports with 62mm OD threaded connections and a centre discharge wet end. It’s commonly found on Chinese manufactured spas and brands including AMC Winer Spa, Spa Serve, MAAX, Cascade, Trinity, and Monalisa. Verify your existing pump specifications before ordering.

Q: What voltage does this pump require?

A: The JA100 requires 230V / 50Hz single-phase power supply. All electrical installation must be carried out by a qualified electrician in accordance with BS 7671 regulations.

Q: Can I use this pump with an air switch for manual control?

A: Yes, the JA100 has a built-in optional air switch facility. It’s popular for whirlpool bath installations where manual on/off control is preferred. The pump is supplied with an air switch on the electrical box which can be disregarded if not needed.

Q: What is the maximum flow rate?

A: The JA100 delivers a maximum flow rate of 320 litres per minute with a maximum head of 11 metres, making it ideal for spa circulation and filtration duties.

Q: What size are the plumbing connections?

A: Both suction and discharge ports are 1.5 inches with a 62mm outside diameter threaded connection. The pump features a centre discharge configuration with adjustable orientation.

Q: Can I rotate the wet end for different plumbing orientations?

A: Yes, the pump body is adjustable. Simply unscrew the four motor bolts to rotate the wet end for left or right discharge orientation to match your existing plumbing layout.

Q: What seal does this pump use?

A: The JA100 uses a Ceramic/Carbon/Viton mechanical seal (LX Type A seal for pumps manufactured from 2008 onwards). Our stock features the latest upgraded seal specification.

Q: Is this pump quieter than other models?

A: Yes, the JA series is specifically engineered for low noise and minimal vibration, making it ideal for residential spa and whirlpool bath applications where quiet operation is important.

Q: What other pumps can the JA100 replace?

A: The JA100 can replace the DXD 310, LX EA350, LX TDA100, LX DH 1.0, and Rocoi LDPB-140B pumps. While the wet ends are almost identical, some minor differences in motor mount design exist. Most technicians use the JA100 as a reliable replacement for all these models.

🏆 Why Choose the LX JA100

✅ Efficient Performance – 1.0 HP motor delivers 320 L/min for effective circulation

✅ Whisper-Quiet Operation – Engineered for low noise and minimal vibration

✅ Proven Reliability – Fitted as standard to major spa brands worldwide

✅ Self-Draining Design – Protects pump when system is switched off

✅ Upgraded Seals – Latest ceramic/Viton specification for improved longevity

✅ Versatile Installation – Adjustable wet end orientation and air switch compatibility

✅ Thermal Protection – Built-in overload protection prevents motor damage

✅ Multiple Replacement Options – Direct replacement for several legacy pump models

🤝 Why Buy From Parts4Tubs

✅ UK-Based Company – Local support from knowledgeable spa specialists

✅ Fast UK Delivery – Quick despatch to get your spa running again

✅ Expert Advice – Our team can help with compatibility questions and technical queries

✅ Competitive Pricing – Trade-quality parts at fair prices

✅ Full Warranty Support – Comprehensive warranty backing on all products

✅ Easy Returns – Hassle-free returns within 30 days if unused

✅ Replacement Parts Available – Seals, capacitors, and other spares in stock

✅ Trusted Supplier – Serving the UK spa industry with quality parts

✨ Summary

The LX JA100 is a quiet, efficient 1.0 HP single-speed circulation pump delivering 320 L/min flow rate for reliable hot tub and whirlpool bath filtration and heating. Featuring 230V/50Hz operation, 1.5-inch plumbing connections, self-draining centre discharge design, and thermal motor protection, it’s a popular replacement for worn pumps on Chinese manufactured spas and brands including AMC Winer, Spa Serve, MAAX, and Monalisa. The built-in air switch facility makes it perfect for whirlpool bath applications. Order from Parts4Tubs for fast UK delivery and expert support.

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.