💪 Waterway 48-Frame Hi-Flo Jet Pump – 2.0 HP Single Speed – 2″ x 2″ Connections

Compact high-flow jet pump delivering powerful performance in space-limited installations

📋 Product Overview

The Waterway 48-Frame 2.0 HP Single Speed Hi-Flo Pump with 2″ x 2″ connections is a compact yet powerful jet pump designed for spas and hot tubs where space is limited but power is essential. The “Hi-Flo” designation indicates this pump is optimised for enhanced water flow performance, delivering impressive jet power from the compact 48-frame design.

Operating at 230V/50Hz with a 1.5 kW power rating, the pump features a 2.0 HP motor running at 2,820 RPM with efficient 4A current draw. The pump uses a 25 µF capacitor for reliable motor starting. Despite its compact 360mm length, this Hi-Flo model delivers excellent water throughput for effective hydrotherapy jets.

The pump features 2-inch x 2-inch standard Waterway union connections (sold separately), providing excellent compatibility as a replacement for many 48-frame pump brands including Vico, Aqua-Flo, Sta-Rite, GE, A.O. Smith, Emerson, and Hydroair. Specifically fits Hot Spring Envoy and Sumatran models. No electrical cable is supplied – your existing wiring must be reused.

⭐ Key Features

✅ Hi-Flo Design – Optimised for enhanced water flow performance

✅ Compact 48-Frame – Ideal for limited space installations

✅ 2.0 HP Motor – Powerful single-speed operation

✅ 2,820 RPM – High-speed motor for excellent jet power

✅ 1.5 kW Power Rating – Efficient operation

✅ 4A Current Draw – Low amperage for efficient performance

✅ 230V / 50Hz – UK standard electrical supply

✅ 25 µF Capacitor – Reliable motor starting

✅ 2″ x 2″ Connections – Standard spa plumbing compatibility

✅ Hot Spring Compatible – Fits Envoy and Sumatran models

🔧 Technical Specifications

Specification	Value
Pump Type	Massage / Jet Pump – Single Speed (Hi-Flo)
Brand	Waterway
SKU	PW-W4821
Frame Size	48-Frame
Motor Power	2.0 HP
Power (kW)	1.5 kW
Speed Settings	Single Speed
Motor Speed	2,820 RPM
Voltage	230 V
Frequency	50 Hz
Amperage	4 A
Capacitor	25 µF
Plumbing Size	2 inch x 2 inch (2″ x 2″)
Unions	Sold separately (Waterway 2″)
Electrical Cable	Not supplied – reuse existing
Length	360 mm
Width	175 mm
Height	185 – 195 mm

⚡ Electrical Requirements

Electrical Specification	Value
Supply Voltage	230 V
Frequency	50 Hz
Power Rating	1.5 kW
Full Load Amps	4 A
Motor Speed	2,820 RPM
Capacitor	25 µF
Phase	Single Phase

Component	Specification
Electrical Cable	Not supplied – reuse existing
Recommended MCB	10 A minimum
Recommended Cable	1.5 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. 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 48-Frame 2.0HP 1-Speed Hi-Flo 📍 Motor: 2.0 HP @ 2,820 RPM 📍 Frame: 48-Frame (compact) 📍 Voltage: 230V / 50Hz 📍 Current: 4A 📍 Capacitor: 25 µF 📍 Plumbing: 2 inch x 2 inch 📍 Dimensions: 360mm × 175mm × 185-195mm

Plumbing Connection Detail:

Port	Size
Suction	2 inch (2″)
Discharge	2 inch (2″)

Compatible Hot Tub Models:

This pump specifically fits:

• Hot Spring Envoy
• Hot Spring Sumatran
• And other spas using 48-frame pumps

Cross-Compatible Pump Brands:

This pump is designed as a replacement for 48-frame models from:

• Vico
• Aqua-Flo
• Sta-Rite
• GE
• A.O. Smith
• Emerson
• Hydroair
• And other 48-frame pumps

Application:

This pump is designed for boost jet operation in hot tubs, particularly where space constraints require a compact pump solution with Hi-Flo performance.

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⚙️ Installation Requirements

Pump Dimensions:

Dimension	Measurement
Length	360 mm
Width	175 mm
Height	185 – 195 mm

Plumbing Connections:

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

Installation Notes:

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

⚠️ Electrical cable NOT supplied – reuse existing wiring

⚠️ Verify 48-frame mounting bolt pattern matches existing pump

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

⚠️ Never run the pump dry

⚠️ Ensure proper electrical bonding to earth

💡 Hi-Flo design provides enhanced water flow performance

💡 Compact design fits tight equipment compartments

💡 Check frame size compatibility before ordering

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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 all connections
Clean pump strainer	As needed	Remove debris
Check mounting bolts	Quarterly	Tighten if loose

Warning Signs – Consider Replacement If:

• Motor hums but doesn’t start (possible capacitor failure)
• Unusual noise or vibration
• Motor overheating
• Significantly reduced jet/flow power
• Pump trips the circuit breaker
• Visible seal leakage

Capacitor Information:

This pump uses a 25 µF capacitor. If the motor hums but doesn’t start, the capacitor may need replacement.

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🎯 Ideal Applications

Application	Suitability	Notes
♨️ Boost Jets	Excellent	Hi-Flo design for enhanced performance
♨️ Space-Limited Installs	Excellent	Compact 48-frame design
♨️ Hot Spring Spas	Excellent	Fits Envoy and Sumatran
♨️ Pump Replacement	Excellent	Universal 48-frame compatibility
♨️ Higher Power Needs	Good	2.0 HP motor upgrade option

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❓ Frequently Asked Questions

Q: What is the power rating of this pump? A: The pump has a 2.0 HP motor running at 2,820 RPM. It draws 4A at 230V/50Hz with a 1.5 kW power rating.

Q: What does “Hi-Flo” mean? A: Hi-Flo indicates this pump is optimised for enhanced water flow performance, delivering greater water throughput compared to standard models of the same power rating.

Q: What is the difference between this pump and the 1.5HP model (PW-W4851)? A: This Hi-Flo pump has a more powerful 2.0 HP motor (vs 1.5 HP), higher kW rating (1.5 kW vs 1.1 kW), and enhanced flow characteristics. Interestingly, it draws less current (4A vs 6.2A), suggesting a more efficient motor design.

Q: What size capacitor does this pump use? A: This pump uses a 25 µF capacitor.

Q: Can I replace a 56-frame pump with this 48-frame pump? A: Generally no – the mounting bolt patterns and dimensions are different. This pump is designed to replace other 48-frame pumps.

Q: What size are the plumbing connections? A: The pump uses 2-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 Hot Spring models does this pump fit? A: This pump specifically fits Hot Spring Envoy and Sumatran models, as well as other spas using 48-frame pumps.

Q: What pump brands can this replace? A: This pump can replace 48-frame models from Vico, Aqua-Flo, Sta-Rite, GE, A.O. Smith, Emerson, Hydroair, and other brands using the 48-frame standard.

🏆 Why Choose the Waterway 48-Frame 2.0 HP Hi-Flo Single Speed Jet Pump (2″ x 2″)

✅ Hi-Flo Performance – Enhanced water flow design

✅ Compact Design – Only 360mm long for tight spaces

✅ Powerful 2.0 HP Motor – More power than 1.5 HP models

✅ Efficient Operation – Just 4A current draw

✅ 2,820 RPM – High-speed motor for excellent jets

✅ Hot Spring Compatible – Fits Envoy and Sumatran

✅ Universal 48-Frame Compatibility – Replaces multiple brands

✅ Quality Waterway Construction – Reliable performance

🤝 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 48-Frame 2.0 HP Single Speed Hi-Flo Pump with 2″ x 2″ connections is a compact yet powerful jet pump optimised for enhanced water flow performance. Features a 2.0 HP motor running at 2,820 RPM with efficient 4A current draw. Operating at 230V/50Hz with a 1.5 kW power rating and 25 µF capacitor. The compact 48-frame design measures only 360mm × 175mm × 185-195mm – ideal for tight equipment spaces. Specifically fits Hot Spring Envoy and Sumatran models. Designed as a direct replacement for 48-frame pumps from Vico, Aqua-Flo, Sta-Rite, GE, A.O. Smith, Emerson, Hydroair, and other brands. Standard Waterway 2″ unions sold separately. Electrical cable not supplied – reuse existing wiring. Ideal for boost jet operation where space is limited but high-flow performance is required.