💦 DXD-310T Circulation Pump – 0.4HP Single Speed

Reliable continuous circulation for hot tubs and spas with unions included

📋 Product Overview

The DXD-310T is a 0.4HP single-speed circulation pump designed for continuous operation in hot tubs and spas. This reliable circulation pump operates at 230V / 50Hz with a motor speed of approximately 2850 RPM, delivering consistent water flow through your spa’s heating and filtration system.

With a maximum flow rate of 167 L/min and maximum lift of 7.0 metres, the DXD-310T provides ample circulation capacity for most hot tub applications. The pump features IPX5 water protection and Class F insulation for reliable operation in demanding spa environments.

Supplied complete with unions included, this circulation pump offers straightforward installation with 1.5-inch plumbing connections. The compact design (330mm × 134mm × 196mm) and 5.5 kg weight make it suitable for a wide range of equipment bays. Plain cable attached for electrical connection.

⭐ Key Features

✅ 0.4HP Motor – Delivers reliable circulation at 2850 RPM

✅ High Flow Rate – Maximum flow of 167 L/min for effective water circulation

✅ 7.0m Maximum Lift – Suitable for various plumbing configurations

✅ IPX5 Water Protection – Rated for spa and hot tub environments

✅ Class F Insulation – High-temperature motor insulation for reliability

✅ Unions Included – Complete with 1.5-inch unions for easy installation

✅ Compact Design – 330mm × 134mm × 196mm fits most equipment bays

✅ Low Current Draw – Approximately 1.5A for economical operation

✅ Single Speed Operation – Consistent, reliable circulation

✅ Plain Cable Attached – Ready for electrical connection

🔧 Technical Specifications

Specification	Value
Pump Type	Circulation Pump – Single Speed
Brand	DXD
Model	DXD-310T
Motor Power	0.4 HP (0.25 kW)
Speed Settings	Single Speed
Voltage	230 V
Frequency	50 Hz
Amperage	1.5 A (approximately)
Motor Speed	2850 RPM
Maximum Flow	167 L/min
Maximum Lift	7.0 m
Capacitor	30 µF
Suction Port	1.5 inch
Discharge Port	1.5 inch
Protection Grade	IPX5
Insulation Class	F
Length	330 mm
Width	134 mm
Height	196 mm
Weight	5.5 kg
Cable Type	Plain cable attached
Unions	Included

⚡ Electrical Requirements

Electrical Specification	Requirement
Supply Voltage	230 V
Frequency	50 Hz
Power Output	0.25 kW (0.4 HP)
Full Load Amps	1.5 A (approximately)
Motor Speed	2850 RPM
Capacitor	30 µF
Protection Grade	IPX5
Insulation Class	F
Cable Supplied	Plain cable attached

⚠️ IMPORTANT ELECTRICAL SAFETY:

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 proper earthing and bonding of all electrical components.

🔗 Compatibility Guide

This Pump Specifications:

📍 Model: DXD-310T 📍 Plumbing Size: 1.5 inch 📍 Unions: Included 📍 Flow Rate: Up to 167 L/min 📍 Maximum Lift: 7.0 m

Suitable For:

• Hot tubs requiring continuous circulation
• Spas with separate circulation and jet pumps
• Systems where the circ pump runs 24/7
• Replacement for similar 0.4HP circulation pumps

⚙️ Installation Requirements

Pump Dimensions:

Dimension	Measurement
Length	330 mm
Width	134 mm
Height	196 mm
Weight	5.5 kg

Plumbing Connections:

Connection	Size
Suction	1.5 inch
Discharge	1.5 inch
Unions	Included

Installation Notes:

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

⚠️ Never run the pump dry – this causes seal damage

⚠️ Ensure proper electrical bonding to earth

⚠️ Install circulation pump close to heater, preferably upstream

💡 Unions are included for straightforward plumbing connection

💡 Compact dimensions allow installation in tight equipment bays

💡 Lightweight at 5.5 kg for easy handling during installation

🛠️ Maintenance Guide

Routine Maintenance:

Task	Frequency	Notes
Check for leaks	Monthly	Inspect around unions and seal
Inspect unions	Monthly	Tighten if necessary, check O-rings
Clean strainer/filter	As needed	Remove debris to maintain flow
Check amperage draw	Annually	Should read approximately 1.5A
Verify pump operation	Weekly	Ensure pump is running when expected
Check water flow	Monthly	Verify adequate circulation

Warning Signs – Consider Replacement If:

• Unusual noise or vibration
• Water leaking from seal area
• Motor fails to start
• Noticeably reduced water flow
• Motor overheating
• Pump trips the circuit breaker

Capacitor Information:

📍 Capacitor: 30 µF

⚠️ If motor hums but doesn’t start, the capacitor may need replacement

🎯 Ideal Applications

Application	Suitability	Notes
♨️ Hot Tub Circulation	Yes	Designed for continuous operation
♨️ Spa Filtration Loop	Yes	167 L/min flow for effective filtration
♨️ Heating Circulation	Yes	Maintains even water temperature
♨️ 24/7 Operation	Yes	Built for continuous running
♨️ Compact Installations	Yes	Small footprint at 330mm × 134mm × 196mm

❓ Frequently Asked Questions

Q: What horsepower is this pump? A: The DXD-310T is a 0.4HP (0.25 kW) circulation pump operating at 2850 RPM.

Q: What voltage does this pump require? A: 230V / 50Hz. All electrical installation must be carried out by a qualified electrician in accordance with BS 7671.

Q: What is the flow rate of this pump? A: The pump delivers a maximum flow of 167 L/min with a maximum lift of 7.0 metres.

Q: Does this pump come with unions? A: Yes, unions are included with the pump for easy 1.5-inch plumbing connection.

Q: What size are the plumbing connections? A: Both suction and discharge ports are 1.5 inch with unions included.

Q: Is this pump suitable for continuous operation? A: Yes, the DXD-310T is designed for continuous operation in hot tubs and spas.

Q: What type of cable does this pump have? A: The pump comes with a plain cable attached for electrical connection.

Q: What is the water protection rating? A: The pump is IPX5 rated, suitable for spa and hot tub environments.

Q: How heavy is this pump? A: The pump weighs 5.5 kg, making it easy to handle during installation.

Q: What capacitor does this pump use? A: The pump uses a 30 µF capacitor.

Q: How do I know if my circulation pump needs replacing? A: Signs include unusual noises, reduced water flow, leaking seals, or the motor failing to start.

🏆 Why Choose the DXD-310T Circulation Pump

✅ Reliable Performance – 0.4HP motor designed for continuous operation

✅ High Flow Capacity – 167 L/min maximum flow for effective circulation

✅ Good Lift – 7.0m maximum lift suits various installations

✅ Complete Package – Unions included for straightforward installation

✅ Protected Motor – IPX5 rated with Class F insulation

✅ Compact Size – 330mm × 134mm × 196mm fits tight spaces

✅ Economical – Low 1.5A current draw reduces running costs

✅ Lightweight – Just 5.5 kg for easy handling

🤝 Why Buy From Parts4Tubs

✅ UK-based company with expert local support

✅ Fast UK delivery options available

✅ Knowledgeable advice from spa industry specialists

✅ Competitive pricing

✅ Full warranty support

✅ Replacement parts and accessories available

✅ Easy returns within 30 days

✨ Summary

The DXD-310T is a 0.4HP (0.25 kW) single-speed circulation pump designed for continuous operation in hot tubs and spas. Operating at 230V / 50Hz with a motor speed of 2850 RPM, this pump delivers a maximum flow of 167 L/min and maximum lift of 7.0 metres. Features IPX5 water protection, Class F insulation, and a 30 µF capacitor. The compact design measures 330mm × 134mm × 196mm and weighs just 5.5 kg. Supplied complete with 1.5-inch unions included and plain cable attached, ready for professional installation. Draws approximately 1.5A for economical continuous operation.

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.