💧 LX TDA150 Spa Pump – 1.5HP Single Speed Jet Pump

Reliable Performance and Whisper-Quiet Operation for Your Ultimate Hot Tub Experience

♨️ Product Overview

The LX TDA150 is a robust 1.5HP single-speed jet pump designed specifically for hot tubs and spa systems. As one of the longest-serving models in the renowned LX TDA series, this pump delivers powerful, consistent water flow to ensure your spa jets provide the perfect massage experience every time.

Engineered for versatility, the TDA150 functions primarily as a jet pump for driving hydrotherapy jets, but can also serve as a booster or circulation pump in various hot tub configurations. Its distinctive yellow motor housing is instantly recognisable, and the pump’s low-noise, low-vibration operation means you can relax in peace whilst enjoying powerful jet performance.

The TDA150 features a centre discharge design with self-draining capability, thanks to its low-positioned suction port. This thoughtful engineering ensures the pump drains automatically when the motor shuts off, reducing the risk of freeze damage and extending pump life. Built with upgraded ceramic and Viton shaft seals, this pump is designed for long-term reliability in demanding spa environments.

⭐ Key Features

✅ 1.5HP Single Speed Motor – Delivers 1.1kW of consistent power at 2900 RPM for strong, reliable jet performance

✅ Self-Draining Design – Low-positioned centre suction port enables automatic drainage when motor shuts off, protecting against freeze damage

✅ Whisper-Quiet Operation – Low-noise, low-vibration motor allows peaceful relaxation during use

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

✅ 48F Frame Size – Industry-standard frame for straightforward replacement in most hot tub installations

✅ Centre Discharge Configuration – 63mm centre suction and discharge ports for in-line plumbing compatibility

✅ 1.5″ Union Connections – Standard buttress thread connections compatible with most spa plumbing systems

✅ High Flow Rate – Maximum flow of 380 L/min ensures powerful jet massage performance

✅ Corrosion-Resistant Construction – Highly reinforced plastic base withstands spa chemicals and moisture

✅ Pre-Wired for Easy Installation – Comes with 3-core AMP cable attached for simplified electrical connection

🔧 Technical Specifications

Motor Specifications

Specification	Value
Motor Power	1.5 HP / 1.1 kW
Speed Type	Single Speed
RPM	2900
Voltage	220-240V
Frequency	50 Hz
Amperage	5.8 A
Capacitor	20 µF
Frame Size	48F

Hydraulic Performance

Specification	Value
Maximum Flow Rate	380 L/min
Maximum Head	14 m
Recommended Jets	6-8 water jets

Physical Dimensions

Specification	Value
Length	400 mm
Width	175 mm
Height	205 mm

Wet End Specifications

Specification	Value
Union Size	1.5″ (inch)
Connection Diameter	63 mm
Suction Port	63 mm Centre
Discharge Port	63 mm Centre
Thread Type	Male Buttress
Impeller Diameter	113 mm
Impeller Part Number	B168-150
Shaft Seal Type	Type A

⚡ Electrical Requirements

Electrical Specification	Requirement
Supply Voltage	220-240V
Frequency	50 Hz
Phase	Single Phase
Full Load Amperage	5.8 A
Capacitor Rating	20 µF
Cable Type	3-Core AMP (pre-attached)

⚠️ 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.

🔄 Compatibility Guide

Frame & Wet End Configuration

Component	Specification
Frame Type	48F
Wet End Size	1.5″
Suction	63mm Centre
Discharge	63mm Centre
Union Collar Diameter	64mm (tip to tip)

Compatible Hot Tub Brands

The LX TDA150 is commonly found in and compatible with the following spa brands:

• ♨️ MAAX Spas
• ♨️ Cascade Spas
• ♨️ Trinity Spas
• ♨️ Monalisa Spas
• ♨️ AMC Winer Spas
• ♨️ Various Chinese-manufactured hot tubs

Replacement Compatibility

This pump is a direct replacement for existing LX TDA150 installations. When replacing pumps from other manufacturers, ensure the following match:

• 48F frame mounting pattern
• 1.5″ buttress thread unions
• Centre suction and discharge configuration
• Similar power rating (1.5HP)

💡 Tip: Measure your existing pump’s union collar diameter. A measurement of approximately 64mm (2.5″ tip to tip) indicates a 1.5″ union size.

🛠️ 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	1.5″ / 63mm
Discharge	1.5″ / 63mm
Union Thread	Male Buttress

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.

⚠️ Air switch removal – LX pumps are no longer supplied with air switches fitted. If an air switch or pneumatic control is required, this can be fitted by a qualified electrician.

💡 Cable Connection: You may need to swap the cable from your old pump as control box connection types vary between spa brands. The pump has three wires: Live (Brown/Black), Neutral (Blue/White), and Earth (Green/Yellow).

🔧 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 approximately 5.8A under load

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 from jets
• 🌡️ Motor housing becoming excessively hot to touch
• 🔄 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
Impeller Part Number	B168-150

⚠️ 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
♨️ Hot Tub Jet Pump	✅ Excellent	Primary intended application for driving massage jets
♨️ Spa Booster Pump	✅ Excellent	Provides additional jet power when needed
♨️ Spa Circulation Pump	✅ Good	Can function as circulation pump in some configurations
🛁 Whirlpool Bath	✅ Good	Suitable for residential whirlpool bath installations
♨️ Swim Spa	✅ Good	Can be used as auxiliary jet pump in swim spa systems

Additional Applications

The TDA150’s robust construction also makes it suitable for:

• 🐟 Cycling water for fish ponds, including saltwater systems
• 🏭 Circulating weak corrosive liquids (without solid granules)
• ❄️ Workshop fluid circulation for cooling applications

❓ Frequently Asked Questions

Q: What horsepower is this pump?

A: The LX TDA150 is rated at 1.5HP (1.1kW), delivering 2900 RPM for powerful jet performance.

Q: Will this pump fit my hot tub?

A: This pump has a 48F frame with 1.5″ (63mm) wet end connections and centre suction/discharge. Check your existing pump’s frame size and wet end configuration for compatibility. The union collar should measure approximately 64mm tip to tip.

Q: What voltage does this pump require?

A: The pump operates on 220-240V / 50Hz single-phase supply, standard for UK installations. All electrical work must be performed by a qualified electrician.

Q: Is this a single or dual speed pump?

A: The TDA150 is a single-speed pump. The high-speed motor runs continuously when powered, making it ideal for jet operation. For dual-speed requirements, consider the LX WP series.

Q: What size are the plumbing connections?

A: Both suction and discharge ports are 1.5″ (63mm) with male buttress threads and centre discharge configuration.

Q: Does this pump come with an air switch?

A: No, LX pumps are no longer supplied with air switches. If required, an air switch or pneumatic control box can be fitted by a qualified electrician.

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, or excessive motor heat.

Q: What brands of hot tub is this compatible with?

A: The TDA150 is commonly found in MAAX, Cascade, Trinity, Monalisa, and AMC Winer spas, as well as many other Chinese-manufactured hot tubs.

Q: Can I install this pump myself?

A: Whilst the plumbing connections can be handled by a competent DIYer, all electrical work must be carried out by a qualified electrician in accordance with UK wiring regulations (BS 7671).

Q: What flow rate does this pump achieve?

A: The TDA150 delivers a maximum flow rate of 380 litres per minute with a maximum head of 14 metres, suitable for powering 6-8 water jets.

🏆 Why Choose the LX TDA150

✅ Proven Reliability – One of LX’s longest-serving pump designs with a track record of dependable performance

✅ Powerful Performance – 1.5HP motor delivers strong, consistent water flow for an exceptional hydrotherapy experience

✅ Quiet Operation – Low-noise, low-vibration design ensures peaceful relaxation during use

✅ Self-Draining Design – Automatic drainage when motor stops protects against freeze damage

✅ Quality Construction – Upgraded ceramic/Viton seals and corrosion-resistant components for extended lifespan

✅ Easy Replacement – Standard 48F frame and 1.5″ connections make swapping out old pumps straightforward

✅ Versatile Application – Functions as jet pump, booster, or circulation pump depending on your needs

✅ Cost-Effective – High-quality alternative to more expensive pump brands at a competitive price point

🤝 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, and other spares in stock for future maintenance

✅ 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 TDA150 is a proven, reliable 1.5HP single-speed jet pump ideal for hot tubs, spas, and whirlpool baths. With its powerful 1.1kW motor delivering 380 L/min flow rate, quiet operation, self-draining design, and upgraded ceramic/Viton seals, this pump offers exceptional value and dependable performance. Standard 48F frame and 1.5″ connections ensure compatibility with most spa systems. Order today and restore powerful jet massage to your hot tub experience.

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.