⚡ LX JA75 Circulation Pump with Optional Air Switch – 0.75 HP Single Speed

Strong, Efficient Circulation for Medium-Sized Spas and Whirlpool Systems

♨️ Product Overview

The LX JA75 is a capable 0.75 HP single-speed circulation pump engineered for hot tubs and whirlpool systems requiring robust water circulation with excellent energy efficiency. Manufactured by LX, a respected leader in spa pump technology, the JA75 delivers a maximum flow rate of 250 litres per minute with a 12-metre head pressure, providing strong performance for medium-sized spa systems.

Featuring a centre discharge design with self-draining capability, this pump automatically drains when the motor shuts off, protecting both the pump and your system from potential damage. The thermally protected motor ensures reliable, long-lasting operation whilst drawing only 3.2 amps. The built-in optional internal air switch provides manual on/off control, making it ideal for whirlpool bath installations where manual operation is preferred.

Commonly installed in spas such as AMC Winer Spa, Spa Serve, and other Chinese-manufactured models, the JA75 delivers efficient and reliable operation where strong circulation performance is essential.

✨ Key Features

✅ 0.75 HP Motor Power – Delivers 0.56 kW of strong circulation power

✅ High Flow Performance – Maximum 250 L/min flow rate with 12m head pressure

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

✅ Self-Draining Design – Centre discharge enables automatic draining when pump stops

✅ Compact Dimensions – Space-saving 325 × 155 × 185 mm footprint

✅ 1.5″ Plumbing Connections – Universal suction and discharge ports

✅ Thermal Motor Protection – Built-in protection extends motor lifespan

✅ 10µF Capacitor – Ensures reliable motor starting

✅ Built-in Air Switch – Optional internal air switch for manual operation

✅ Energy Efficient – Only 3.2 amp draw for economical running costs

🔧 Technical Specifications

Specification	Value
Pump Type	Circulation Pump
Motor Power	0.75 HP / 0.56 kW
Speed Settings	Single Speed
Flow Rate (Maximum)	250 L/min
Maximum Head	12 m
Amperage	3.2 A
Motor Speed	2,900 RPM
Wet End Configuration	1.5 inch Centre Discharge
Discharge Port	1.5 inch
Suction Port	1.5 inch
Port Position	Centre Discharge
Dimensions (L × W × H)	325 × 155 × 185 mm
Capacitor	10 µF
Thermal Protection	Built-in
Air Switch	Built-in (Optional Use)

🔌 Electrical Requirements

Electrical Specification	Requirement
Full Load Amperage	3.2 A
Capacitor Rating	10 µF
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 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
Suction Port	1.5 inch
Discharge Port	1.5 inch
Wet End Style	Centre Discharge
Union Type	1.5-inch suction and discharge unions

This Pump Features:

📍 Wet End: 1.5 inch centre discharge
📍 Discharge: 1.5 inch
📍 Suction: 1.5 inch
📍 Design: Self-draining capability

Compatible Spa Brands:

✅ AMC Winer Spa
✅ Spa Serve
✅ Other Chinese-manufactured spas

🛠️ 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

Plumbing Connections

Connection	Size
Suction	1.5 inch
Discharge	1.5 inch

Installation Notes

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

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

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

⚠️ Centre discharge design allows self-draining when motor is switched off

⚠️ Built-in air switch can be used or disregarded depending on your installation requirements

🔧 Maintenance Guide

Routine Maintenance Schedule

Task	Frequency	Notes
Check for leaks	Monthly	Inspect around seal and union connections
Inspect unions	Monthly	Tighten if necessary
Clean strainer/filter	As needed	Remove debris to maintain flow rate
Check amperage draw	Annually	Should match 3.2A rating
Inspect motor vents	Quarterly	Keep clear of debris
Check mounting bolts	Quarterly	Tighten if loose

Warning Signs – Replace Pump If:

⚠️ Unusual noise such as grinding, screeching, or humming
⚠️ Water leaking from the seal area
⚠️ Motor trips the circuit breaker repeatedly
⚠️ Significantly reduced water flow
⚠️ Motor overheating or shutting down on thermal protection

🛁 Ideal Applications

Application	Suitability	Notes
♨️ Hot Tub Circulation	Excellent	Strong flow for medium-sized spas
♨️ Spa Filtration	Excellent	250 L/min ensures effective filtration
🛁 Whirlpool Bath	Excellent	Built-in air switch for manual control
♨️ Heating Circulation	Excellent	12m head for demanding heating loops

❓ Frequently Asked Questions

Q: What horsepower is the LX JA75 pump?

A: The LX JA75 is a 0.75 HP (0.56 kW) circulation pump with a single-speed motor running at 2,900 RPM.

Q: Will this pump fit my hot tub?

A: The JA75 features 1.5-inch suction and discharge ports with a centre discharge wet end. It’s commonly installed in AMC Winer Spa, Spa Serve, and other Chinese-manufactured spas. Verify your existing pump specifications before ordering.

Q: What is the amperage draw?

A: The JA75 draws 3.2 amps, providing strong circulation performance with reasonable energy consumption.

Q: Does this pump have an air switch?

A: Yes, the JA75 is fitted with a built-in optional internal air switch for manual operation. You can use it for manual on/off control or disregard it if not needed for your installation.

Q: What is the maximum flow rate?

A: The JA75 delivers a maximum flow rate of 250 litres per minute with a maximum head of 12 metres.

Q: What size are the plumbing connections?

A: Both suction and discharge ports are 1.5 inches. The pump features a centre discharge configuration with self-draining capability.

Q: Is this pump self-draining?

A: Yes, the centre discharge design allows the pump to self-drain when the motor is switched off, protecting the system from potential damage.

Q: What capacitor does this pump use?

A: The JA75 uses a 10µF capacitor for reliable motor starting.

Q: How does the JA75 compare to other JA series pumps?

A: The JA75 sits between the JA50 (0.5 HP) and JA100 (1.0 HP) in terms of power output. It offers 250 L/min flow rate and 12m head pressure, making it suitable for medium-sized spa systems requiring stronger circulation than smaller models.

🏆 Why Choose the LX JA75

✅ Strong Performance – 0.75 HP motor delivers 250 L/min for effective circulation

✅ Excellent Head Pressure – 12m maximum head for demanding installations

✅ Compact Size – Space-saving 325 × 155 × 185 mm dimensions

✅ Self-Draining Design – Centre discharge protects system when switched off

✅ Thermally Protected – Built-in motor protection for longevity

✅ Built-in Air Switch – Optional manual control for whirlpool baths

✅ Proven Reliability – Trusted LX manufacturing quality

✅ Energy Efficient – Only 3.2 amp draw for economical operation

🤝 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

✅ Competitive Pricing – Trade-quality parts at fair prices

✅ Full Warranty Support – Comprehensive warranty backing

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

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

💫 Summary

The LX JA75 is a capable 0.75 HP single-speed circulation pump delivering 250 L/min flow rate with 12m head pressure for medium-sized hot tubs and whirlpool systems. Drawing 3.2 amps, it features 1.5-inch plumbing connections, centre discharge self-draining design, thermal motor protection, and a built-in optional air switch for manual control. Commonly installed in AMC Winer Spa, Spa Serve, and Chinese-manufactured spas, it offers strong performance where robust circulation is required. Order from Parts4Tubs for fast UK delivery and expert support.