💪 DXD-325A Spa Jet Pump – 2.5 HP Single Speed

Maximum jet power delivering 833 L/min for exceptional hydrotherapy performance

📋 Product Overview

The DXD-325A is a high-performance 2.5 HP single-speed water pump designed for spa and hot tub applications requiring maximum jet power. With an impressive maximum flow rate of 833 litres per minute and a maximum lift of 20 metres, this pump delivers exceptional hydrotherapy performance for demanding spa systems.

Operating at 230V/50Hz with an impeller rotation speed of 2,850 RPM, the DXD-325A ensures powerful and efficient water circulation through your jet system. The 1.85-1.9 kW motor draws approximately 9A, providing robust power output for multiple jet configurations and larger spa installations.

The pump features 2.0-inch union connectors with unions included, simplifying installation and ensuring compatibility with standard spa plumbing. A plain cable is attached for direct electrical connection. With IPX5 protection grade and Insulation Class F, this pump is built for durability and safety in demanding spa environments. The unit weighs approximately 15.0 kg and measures 463mm × 160mm × 256mm.

⭐ Key Features

✅ 2.5 HP Motor – Maximum single-speed jet power

✅ 833 L/min Maximum Flow – Outstanding jet performance

✅ 20m Maximum Lift – Exceptional head pressure capability

✅ 2,850 RPM – High-speed impeller rotation

✅ 230V / 50Hz – UK standard electrical supply

✅ IPX5 Protection – Water jet resistant from any direction

✅ Insulation Class F – Premium motor insulation rating

✅ 2″ Unions Included – Complete installation package

✅ Plain Cable Attached – Ready for electrical connection

✅ Robust Construction – 15 kg solid build quality

⚙️ Technical Specifications

Specification	Value
Pump Type	Massage / Jet Pump – Single Speed
Brand	DXD
Model	325A
Motor Power	2.5 HP
Power (kW)	1.85 – 1.9 kW
Wet-End Impeller	2.5 HP
Speed Settings	Single Speed
Voltage	230 V
Frequency	50 Hz
Amperage	9.0 A (approx.)
Motor Speed	2,850 RPM
Maximum Flow	833 L/min
Maximum Lift	20 m
Plumbing Size	2 inch (2″)
Union Connector	2.0 inch
Unions Included	Yes
Electrical Connection	Plain cable attached
Protection Grade	IPX5
Insulation Class	F
Length	463 mm
Width	160 mm
Height	256 mm
Weight	15.0 kg (approx.)

🔌 Electrical Requirements

Electrical Specification	Requirement
Supply Voltage	230 V
Frequency	50 Hz
Power Output	1.85 – 1.9 kW (2.5 HP)
Full Load Amps	9.0 A (approx.)
Motor Speed	2,850 RPM
Protection Grade	IPX5
Insulation Class	F
Electrical Connection	Plain cable attached
Recommended MCB	16 A minimum

⚠️ 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. Due to the 9A current draw, ensure your circuit and wiring are appropriately rated for continuous operation. A dedicated circuit is recommended for this pump.

🔗 Compatibility Guide

This Pump Specifications:

📍 Model: DXD-325A 📍 Motor: 2.5 HP / 1.85-1.9 kW 📍 Voltage: 230V / 50Hz 📍 Current: 9.0A 📍 Plumbing: 2 inch unions (included) 📍 Dimensions: 463mm × 160mm × 256mm 📍 Weight: 15.0 kg

Suitable Applications:

• Hot tubs requiring 2.5 HP jet pump
• Large spa systems with multiple jets
• Swim spas requiring high flow rates
• Whirlpool bath installations
• Systems requiring maximum jet power (up to 833 L/min)

Union Connections:

The pump includes 2.0-inch union connectors for straightforward connection to standard spa plumbing.

🛠️ Installation Requirements

Pump Dimensions:

Dimension	Measurement
Length	463 mm
Width	160 mm
Height	256 mm
Weight	15.0 kg (approx.)

Plumbing Connections:

Connection	Size	Notes
Union Type	2.0 inch	Unions included
Plumbing Size	2 inch	Standard spa jet pump size

Installation Notes:

⚠️ Unions are included with this pump

⚠️ Plain cable attached – ready for electrical connection

⚠️ Pump must be installed below water level (flooded suction) or with proper priming

⚠️ Never run the pump dry – causes seal and impeller damage

⚠️ Ensure proper electrical bonding to earth

⚠️ IPX5 rated – suitable for spa equipment room environments

⚠️ 9A draw requires appropriately rated circuit

💡 Allow adequate ventilation around motor for cooling

💡 Ensure mounting surface is solid, level, and vibration-dampening

💡 Weight of 15 kg – ensure adequate support

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🔧 Maintenance Guide

Routine Maintenance:

Task	Frequency	Notes
Check for leaks	Monthly	Inspect unions and pump seal
Check motor operation	Weekly	Listen for unusual sounds
Verify jet performance	Monthly	Ensure strong water flow
Inspect wiring	Annually	Check for damage or corrosion
Clean pump strainer	As needed	Remove debris
Check union tightness	Quarterly	Hand-tighten if necessary

Warning Signs – Consider Replacement If:

• Motor hums but doesn’t start
• Unusual noise or vibration
• Motor overheating
• Significantly reduced jet power
• Pump trips the circuit breaker
• Visible seal leakage
• Burning smell from motor

Seal Information:

Contact Parts4Tubs for compatible seal kits for the DXD-325A.

🎯 Ideal Applications

Application	Suitability	Notes
♨️ Hot Tub Jet Pump	Yes	Maximum massage jet power
♨️ Large Spa Systems	Yes	High flow for multiple jets
♨️ Spa Hydrotherapy	Yes	833 L/min water delivery
🛁 Whirlpool Bath	Yes	Powerful jet performance
♨️ Multi-Jet Configurations	Yes	Handles demanding systems
♨️ Commercial Spas	Yes	Heavy-duty 2.5 HP motor

❓ Frequently Asked Questions

Q: What is the power rating of this pump? A: The DXD-325A is rated at 2.5 HP (1.85-1.9 kW), drawing approximately 9A at 230V/50Hz.

Q: What is the maximum flow rate? A: The pump delivers a maximum flow rate of 833 L/min (litres per minute).

Q: What is the maximum head/lift? A: The maximum lift is 20 metres, suitable for installations with significant vertical rise.

Q: What size are the plumbing connections? A: The pump uses 2-inch plumbing with union connectors included.

Q: Are unions included with this pump? A: Yes, the pump comes with 2.0-inch unions included.

Q: Does this pump come with wiring? A: Yes, a plain cable is attached for electrical connection.

Q: What is the IP rating? A: The pump has IPX5 protection, providing resistance to water jets from any direction.

Q: What is Insulation Class F? A: Insulation Class F indicates the motor insulation can withstand temperatures up to 155°C, providing superior thermal protection compared to lower classes.

Q: What is the motor speed? A: The impeller rotates at 2,850 RPM for powerful water circulation.

Q: How does this compare to the DXD-320E? A: The 325A is more powerful (2.5 HP vs 2.0 HP) with higher flow (833 vs 733 L/min) and greater lift (20m vs 19m), making it suitable for larger spa systems.

🏆 Why Choose the DXD-325A Jet Pump

✅ Maximum 2.5 HP Power – Top-tier jet performance

✅ 833 L/min Flow Rate – Outstanding water delivery

✅ 20m Maximum Lift – Superior head pressure

✅ IPX5 & Class F – Premium protection ratings

✅ Unions Included – Complete installation package

✅ 230V / 50Hz – Designed for UK electrical supply

✅ Proven DXD Quality – Reliable pump manufacturer

✅ Plain Cable Attached – Ready for connection

🇬🇧 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 seals and parts available

✅ Easy returns within 30 days

✨ Summary

The DXD-325A is a high-performance 2.5 HP single-speed jet pump designed for spa and hot tub applications requiring maximum jet power. Operating at 230V/50Hz with 1.85-1.9 kW power consumption and 9A current draw, this pump delivers an impressive 833 L/min maximum flow rate and 20m maximum lift. The 2,850 RPM impeller speed ensures powerful hydrotherapy jet performance. Features 2-inch plumbing with union connectors included. IPX5 protection grade with Insulation Class F for premium durability. Plain cable attached for electrical connection. Dimensions: 463mm × 160mm × 256mm. Weight: approximately 15.0 kg. An excellent choice for larger spas and demanding jet configurations.

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Reset Apply

	1.5 inch Union O-Ring	£1.55 Max: 54 Min: 1 Step: 1 Add to cart
	2 inch Union O-Ring	£1.55 Max: 100 Min: 1 Step: 1 Add to cart
	2 to 1.5 inch Threaded Union Adapter	£7.27 Max: 52 Min: 1 Step: 1 Add to cart
	2.5 inch Union O-Ring	£1.55 Max: 100 Min: 1 Step: 1 Add to cart
	2.5 inch Waterway Union with 2 inch Tailpiece	£9.69 Max: 34 Min: 1 Step: 1 Add to cart
	4 pin Amp cord (Dual Speed Pump)	£18.06 Max: 6 Min: 1 Step: 1 Add to cart

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!

Hot Tub Pump Collar & Union Size Chart

Imperial & Metric Specifications

Union Size	Collar Size	Thread OD	Union OD	O-Ring Size
1.5" Female Buttress Thread (FBT)	2.5" / 64mm (Tip to Tip) Measurement	2-1/2" 64mm	2-13/16" 71mm	2-5/16" OD 59mm
2" Female Buttress Thread (FBT)	3.1" / 78mm (Tip to Tip) Measurement	3-1/16" 78mm	3-3/8" 81mm	2-15/16" OD 75mm
2.5" Female Buttress Thread (FBT)	3.6" / 91mm (Tip to Tip) Measurement	3-5/8" 91mm	4-1/4" 108mm	3-7/16" OD 87mm

Important Notes

The union "size" (1.5", 2", 2.5") is nominal and doesn't correspond to any actual measurement.

Collar size is measured from thread tip to thread tip on the pump outlet.

Most hot tub pumps use Female Buttress Thread (FBT) - 98% of applications.

O-ring gaskets may vary between manufacturers - measure your existing gasket for accuracy.

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.