🔧 Waterway 56-Frame Jet Pump – 3.0 HP Single Speed – 2.5″ x 2″ Connections

Maximum jet power with larger suction port for high-flow Artesian spa systems

📋 Product Overview

The Waterway 3.0 HP 56-Frame Single Speed Pump with 2.5″ x 2″ connections is a high-power jet pump designed for boost jet operation in hot tubs requiring maximum water flow and strong jet performance. Featuring a 3.0-3.21 HP motor paired with a 5 HP-rated wet-end impeller, this pump delivers exceptional jet power for demanding hydrotherapy applications.

Operating at 230V/50Hz with a motor speed of approximately 2,840 RPM, the pump draws 12.3-12.8A and delivers 2.2 kW of power output. The robust 56-frame motor design provides superior cooling and longevity, essential for handling the higher power demands of this pump whilst the larger 2.5-inch suction port enables maximum water intake for improved flow.

The pump features 2.5-inch x 2-inch Waterway union connections (sold separately), providing larger suction diameter for systems requiring high-volume water delivery. Commonly used with Artesian and Artesian Island Spas, this pump can serve as a direct replacement in systems requiring high-power jet operation with larger plumbing. Uses a 36 µF capacitor for reliable motor starting. No electrical cable is supplied – your existing wiring must be reused.

⭐ Key Features

✅ 3.0 HP Motor – High-power single-speed performance

✅ 5 HP Wet-End Impeller – Oversized for maximum flow

✅ 56-Frame Design – Larger motor for better cooling under high load

✅ 230V / 50Hz – UK standard electrical supply

✅ 2,840 RPM – High-speed motor for powerful jets

✅ 2.5″ x 2″ Connections – Larger suction for high-flow systems

✅ 2.2 kW Power Output – Strong jet performance

✅ 36 µF Capacitor – Reliable motor starting

✅ Artesian Compatible – Direct fit for Artesian spas

✅ Proven Waterway Quality – Industry-leading manufacturer

⚙️ Technical Specifications

Specification	Value
Pump Type	Massage / Jet Pump – Single Speed
Brand	Waterway
Frame Size	56-Frame
Motor Power	3.0 – 3.21 HP
Wet-End Impeller Rating	5 HP
Power (kW)	2.2 kW
Speed Settings	Single Speed
Voltage	230 V
Frequency	50 Hz
Amperage	12.3 – 12.8 A
Motor Speed	2,840 RPM (approx.)
Capacitor	36 µF
Plumbing Size	2.5 inch x 2 inch (2½” x 2″)
Unions	Sold separately (Waterway 2.5″)
Electrical Cable	Not supplied – reuse existing
Length	430 mm
Width (Depth)	200 mm
Height	240 mm

⚡ Electrical Requirements

Electrical Specification	Requirement
Supply Voltage	230 V
Frequency	50 Hz
Power Output	2.2 kW (3.0 HP)
Full Load Amps	12.3 – 12.8 A
Motor Speed	2,840 RPM (approx.)
Capacitor	36 µF
Electrical Cable	Not supplied – reuse existing
Recommended MCB	20 A minimum
Recommended Cable	4.0 mm² 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. This is a high-power pump drawing up to 12.8A – ensure your electrical supply and circuit breaker are adequately rated. The electrical cable is not supplied – your existing wiring from the previous pump must be reused and inspected before connection.

🔗 Compatibility Guide

This Pump Specifications:

📍 Model: Waterway 56-Frame 3.0HP 1-Speed 📍 Motor: 3.0 – 3.21 HP / 2.2 kW 📍 Wet-End: 5 HP impeller rating 📍 Frame: 56-Frame 📍 Voltage: 230V / 50Hz 📍 Current: 12.3 – 12.8A 📍 Plumbing: 2.5 inch x 2 inch 📍 Dimensions: 430mm × 200mm × 240mm

Plumbing Connection Detail:

Port	Size
Suction	2.5 inch (2½”)
Discharge	2 inch (2″)

Compatible Hot Tub Brands:

This pump is commonly used with:

• Artesian Spas
• Artesian Island Spas

Application:

This pump is designed for boost jet operation in hot tubs requiring high-power jet performance with larger plumbing systems.

🛠️ Installation Requirements

Pump Dimensions:

Dimension	Measurement
Length	430 mm
Width (Depth)	200 mm
Height	240 mm

Plumbing Connections:

Connection	Size	Notes
Suction	2.5 inch	Waterway unions (sold separately)
Discharge	2 inch	Waterway unions (sold separately)

Installation Notes:

⚠️ Unions sold separately – order Waterway 2.5″ and 2″ unions as required

⚠️ Electrical cable NOT supplied – reuse existing wiring

⚠️ High-power pump – ensure adequate electrical supply (20A MCB minimum)

⚠️ Pump must be installed below water level (flooded suction)

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

⚠️ Ensure proper electrical bonding to earth

💡 56-frame design essential for 3.0 HP motor cooling

💡 Larger 2.5″ suction port provides improved water flow

💡 Uses larger 36 µF capacitor than 2.0 HP models

💡 Check existing pump specifications before ordering

🔄 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 overheating
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 (possible capacitor failure)
• Unusual noise or vibration
• Motor overheating frequently
• Significantly reduced jet power
• Pump trips the circuit breaker
• Visible seal leakage
• Burning smell from motor
• Wiring shows signs of heat damage

Capacitor Information:

This pump uses a 36 µF capacitor – larger than 2.0 HP models due to higher motor power. Replace with same specification if motor fails to start or hums without turning.

🎯 Ideal Applications

Application	Suitability	Notes
♨️ High-Power Boost Jets	Excellent	Primary intended use
♨️ Artesian Spas	Excellent	Direct compatible replacement
♨️ High-Flow Systems	Excellent	2.5″ suction for maximum flow
♨️ Large Hot Tubs	Excellent	High water volume capability
♨️ Multi-Jet Systems	Excellent	5 HP wet-end handles high demand
♨️ Premium Hydrotherapy	Excellent	Strong jet pressure

❓ Frequently Asked Questions

Q: What is the power rating of this pump? A: The pump has a 3.0-3.21 HP motor paired with a 5 HP-rated wet-end impeller, drawing 12.3-12.8A at 230V/50Hz and delivering 2.2 kW.

Q: What is the difference between this pump and the 2″ x 2″ version (PW-W5630)? A: This pump (PW-W5631) has a larger 2.5″ suction port for improved water flow, whilst the 2″ x 2″ version (PW-W5630) uses standard 2″ connections on both ports. The motor, power, and electrical specifications are identical. Choose based on your spa’s existing plumbing size.

Q: What size are the plumbing connections? A: The pump uses a 2.5-inch suction and 2-inch discharge with standard Waterway unions, which are sold separately.

Q: Does this pump come with unions? A: No, the Waterway unions are sold separately to allow flexibility for your specific installation.

Q: Does this pump come with an electrical cable? A: No, the electrical cable is not supplied. You must reuse the existing wiring from your previous pump.

Q: What capacitor does this pump use? A: This pump uses a 36 µF capacitor – larger than the 30 µF used in 2.0 HP models.

Q: What is a 56-frame motor? A: A 56-frame motor is larger than a 48-frame motor, providing better cooling, higher power capacity, and longer service life – essential for 3.0 HP operation.

Q: What hot tub brands is this pump compatible with? A: The pump is commonly used with Artesian and Artesian Island Spas.

Q: What circuit breaker do I need? A: A minimum 20A MCB is recommended for this high-power pump.

Q: What is the motor speed? A: The motor operates at approximately 2,840 RPM.

🏆 Why Choose the Waterway 3.0 HP 56-Frame Jet Pump (2.5″ x 2″)

✅ Powerful 3.0 HP Motor – Maximum jet performance

✅ 5 HP Wet End – Highest flow capacity

✅ 2.5″ Suction Port – Larger intake for maximum water flow

✅ 56-Frame Construction – Superior cooling for high power

✅ 2,840 RPM Performance – Strong, consistent jet delivery

✅ 2.2 kW Power Output – Premium hydrotherapy experience

✅ Artesian Compatible – Direct replacement for Artesian spas

✅ Proven Waterway Quality – Industry-leading manufacturer

🤝 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, capacitors, and unions available

✅ Easy returns within 30 days

✨ Summary

The Waterway 3.0 HP 56-Frame Single Speed Pump with 2.5″ x 2″ connections is a high-power jet pump designed for demanding boost jet operation in hot tubs requiring maximum water flow. Features a 3.0-3.21 HP motor paired with a 5 HP-rated wet-end impeller. Operating at 230V/50Hz, drawing 12.3-12.8A and delivering 2.2 kW at approximately 2,840 RPM. The larger 2.5″ suction port provides improved water flow compared to standard 2″ models. Uses a 36 µF capacitor. Waterway unions sold separately. Commonly used with Artesian and Artesian Island Spas. Electrical cable not supplied. Dimensions: 430mm × 200mm × 240mm. The ultimate choice for premium hot tub jet performance requiring maximum power and flow.

Showing 1 – 6 of 6 results Showing all 6 results Showing the single result No results found

Sort by

Sort by Popularity

Sort by Rating

Sort by Price low to high

Sort by Price high to low

Sort by Newness

Sort by Name A - Z

Sort by Name Z - A

Sort by

Filters Sort

Reset Apply

	1.5 inch Union O-Ring	£1.49 Max: 90 Min: 1 Step: 1 Add to cart
	2 inch Union O-Ring	£1.49 Max: 100 Min: 1 Step: 1 Add to cart
	2 to 1.5 inch Threaded Union Adapter	£6.99 Max: 59 Min: 1 Step: 1 Add to cart
	2.5 inch Union O-Ring	£1.49 Max: 100 Min: 1 Step: 1 Add to cart
	2.5 inch Waterway Union with 2 inch Tailpiece	£9.32 Max: 44 Min: 1 Step: 1 Add to cart
	4 pin Amp cord (Dual Speed Pump)	£17.37 Max: 9 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.