⚡ Pentair Sta-Rite HD 1.5 HP Three Phase Pool Pump

IE3 Compliant Commercial-Grade Efficiency with Italian Engineering – Built for Professional Pool Installations 🏭

📋 Product Overview

The Pentair Sta-Rite HD 1.5 HP Three Phase brings commercial-grade efficiency to professional pool installations. Designed for facilities with three-phase electrical supply, this pump delivers the same exceptional 26 m³/hr flow as its single-phase counterpart whilst offering the superior motor efficiency, smoother operation, and enhanced durability that three-phase technology provides.

Manufactured 100% at Pentair’s state-of-the-art facility in Pisa, Italy, the three-phase Sta-Rite HD meets stringent IE3 energy efficiency standards—the highest classification for motors above 0.75 kW. This isn’t just a regulatory checkbox; IE3 compliance typically delivers 2–4% better efficiency than IE2 motors, translating to meaningful energy savings over years of commercial operation.

The induction asynchronous motor features a bi-material shaft with AISI 304 stainless steel drive-end and premium SKF sealed bearings. Three-phase power delivery provides balanced torque, reduced vibration, lower heat generation, and significantly extended motor lifespan compared to single-phase alternatives—critical factors for pumps running extended hours in commercial environments.

With the signature XL pre-filter basket, PPO resin sleeved impeller rated for 0.40% saltwater, and Pentair’s comprehensive 3-year warranty, the Sta-Rite HD 1.5 HP Three Phase delivers the reliability and efficiency that commercial pool operators demand.

⭐ Key Features

✅ IE3 Energy Efficiency Compliant – Meets the highest European motor efficiency standards, delivering 2–4% better efficiency than standard IE2 motors

✅ Three-Phase Motor Technology – Balanced power delivery provides smoother operation, reduced vibration, lower heat generation, and extended lifespan

✅ 100% Italian Manufacturing – Built at Pentair’s Pisa facility with European quality standards and precision engineering

✅ Commercial-Grade Construction – Engineered for extended daily operation in demanding professional environments

✅ XL Pre-Filter Basket – Extra-large capacity extends cleaning intervals and handles heavy debris loads in high-traffic facilities

✅ Premium SKF Sealed Bearings – Automotive-grade bearings deliver exceptional longevity and whisper-quiet operation

✅ Bi-Material Stainless Steel Shaft – AISI 304 stainless steel drive-end ensures corrosion resistance and precise alignment

✅ PPO Resin Sleeved Impeller – Advanced polymer construction withstands harsh chemicals and saltwater environments

✅ Saltwater Compatible – Certified for salt chlorination systems up to 0.40% salinity

✅ Quick Self-Priming – Rapid, safe startup minimises downtime and protects against dry running

✅ ¼ Turn Opening Lid – Tool-free access for fast maintenance—essential in commercial settings

✅ Stainless Steel Locking Clamp – Secure, corrosion-resistant closure for reliable sealing

✅ 63mm Threaded Connections – Generous 2″ inlet/outlet with unions included

✅ IP-X5 Weather Protection – Splash-resistant motor housing for plant room installations

✅ 3-Year Warranty – Comprehensive coverage including bearings (90-day mechanical seal)

🔧 Technical Specifications

Specification	Value
Model	Sta-Rite HD (5P6RF-3)
Part Number	P-STRHD-153E3
Motor Power	1.5 HP / 1.1 kW
Phase	Three Phase (Tri)
Voltage	380–420V
Frequency	50Hz
Flow Rate @ 8m Head	26 m³/hr
Energy Efficiency Class	IE3 (Premium Efficiency)
Recommended Pool Size	70–120 m³ (up to 150 m³ commercial)
Inlet/Outlet	63mm threaded
Union Diameter	63mm ID
Unions Included	Yes
Total Length	645mm
Weight	29 kg
IP Rating	IP-X5
Salt Resistance	Up to 0.40%
Shaft Material	Bi-material with AISI 304 SS drive-end
Bearings	SKF sealed
Impeller Material	PPO Resin (sleeved)
Warranty (Pump)	3 Years (including bearings)
Warranty (Mechanical Seal)	90 Days
Country of Origin	Italy 🇮🇹

💰 Usage Costs & Running Expenses

Three-phase motors offer superior efficiency, particularly in commercial applications with extended operating hours. Here’s a transparent cost analysis.

📊 Annual Running Cost Calculation

Base Parameters:

• Power consumption: 1.1 kW
• Current UK electricity rate: £0.2635 per kWh (Ofgem Price Cap, Q4 2025)
• Commercial rates typically: £0.24–£0.28 per kWh

🏊 Scenario 1: Seasonal Commercial Pool (April–October)

Holiday parks, outdoor leisure facilities, and seasonal commercial pools.

Calculation:

• Daily runtime: 12 hours
• Operating season: 210 days (April–October)
• Annual operating hours: 12 × 210 = 2,520 hours
• Energy consumption: 1.1 kW × 2,520 hours = 2,772 kWh
• ✅ Annual running cost: 2,772 × £0.2635 = £730.43

💵 Monthly cost during season: approximately £104

♨️ Scenario 2: Year-Round Commercial Pool

Hotels, health clubs, and indoor facilities operating continuously.

Calculation:

• Daily runtime: 14 hours
• Operating days: 365 days
• Annual operating hours: 14 × 365 = 5,110 hours
• Energy consumption: 1.1 kW × 5,110 hours = 5,621 kWh
• ✅ Annual running cost: 5,621 × £0.2635 = £1,481.13

💷 Monthly cost: approximately £123

🏢 Scenario 3: High-Demand Commercial Installation

Leisure centres, school pools, and facilities with extended operating hours.

Calculation:

• Daily runtime: 16 hours
• Operating days: 365 days
• Annual operating hours: 16 × 365 = 5,840 hours
• Energy consumption: 1.1 kW × 5,840 hours = 6,424 kWh
• ✅ Annual running cost: 6,424 × £0.2635 = £1,692.72

💰 Monthly cost: approximately £141

⚡ Three-Phase vs Single-Phase: The Efficiency Advantage

Three-phase motors typically operate 2–5% more efficiently than single-phase equivalents, with additional benefits:

Factor	Single-Phase 1.5 HP	Three-Phase 1.5 HP	Advantage
Rated Power	1.1 kW	1.1 kW	Same
Typical Efficiency	82–85%	86–89% (IE3)	+3–4%
Effective Power Draw	~1.1 kW	~1.05 kW*	Lower
Vibration	Moderate	Low	Smoother
Heat Generation	Higher	Lower	Cooler running
Motor Lifespan	8–12 years	12–18 years	+50% longer
Starting Current	High surge	Balanced	Gentler startup

*IE3 efficiency gains reduce effective power consumption

Annual savings calculation (5,110 hours commercial operation):

• Single-phase: 1.1 kW × 5,110 = 5,621 kWh = £1,481.13
• Three-phase (IE3, ~4% efficiency gain): 1.05 kW × 5,110 = 5,365 kWh = £1,413.68

💸 Potential annual saving from IE3 efficiency: £67.45

📈 10-year saving: £674.50 (plus extended motor lifespan value)

📊 Single-Phase vs Three-Phase: Choosing the Right Option

Factor	1.5 HP Single-Phase	1.5 HP Three-Phase
Price	£669.00	£674.00
Weight	19 kg	29 kg
Voltage	220–240V	380–420V
Efficiency Class	Standard	IE3 Premium
Best For	Residential, light commercial	Commercial, industrial
Electrical Requirement	Standard supply	Three-phase supply required

Choose Three-Phase when:

• Three-phase electrical supply is available
• Extended daily operation (10+ hours) is planned
• Commercial reliability and lifespan are priorities
• Energy efficiency certification matters (IE3)
• Lower vibration and quieter operation are valued

🎯 Real World Applications

🏨 Hotel & Resort Pools

The Sta-Rite HD 1.5 HP Three Phase delivers the reliability that hospitality venues demand. IE3 efficiency reduces operating costs whilst the robust three-phase motor handles the extended hours typical of guest facilities. The XL basket manages increased debris from high bather loads.

🏋️ Health Clubs & Fitness Centres

Gym pools operate long hours with demanding filtration requirements. Three-phase reliability ensures consistent performance throughout 14+ hour daily operation, whilst IE3 efficiency helps control utility costs in energy-conscious facilities.

🏫 School & University Pools

Educational facilities require dependable equipment meeting institutional procurement standards. The IE3 efficiency rating satisfies sustainability requirements whilst the 3-year warranty provides procurement confidence.

🎢 Holiday Parks & Caravan Sites

Seasonal commercial pools serving hundreds of guests need pumps that perform reliably throughout busy summer periods. The three-phase motor’s reduced heat generation and lower vibration extend service life in demanding seasonal use.

🏊‍♂️ Swimming Schools & Training Centres

Facilities with extended operating hours benefit from three-phase efficiency and durability. The lower vibration also contributes to a more pleasant poolside environment for instructors and swimmers.

🔄 Commercial Pump Replacement

When replacing existing commercial three-phase pumps, the Sta-Rite HD’s adjustable connections and standard dimensions enable straightforward retrofitting without extensive plant room modifications.

💡 Cost Savings Examples

📍 Scenario: Upgrading from an Ageing Commercial Pump

Older commercial pumps often operate at significantly reduced efficiency. Replacing with IE3-rated equipment delivers substantial savings.

Example comparison:

• ❌ Aged pump power draw: approximately 1.35 kW
• ✅ New Sta-Rite HD 1.5 HP 3-Phase: 1.1 kW (IE3)
• Commercial operation: 14 hours/day × 365 days = 5,110 hours annually

Annual energy consumption:

• ❌ Old pump: 1.35 kW × 5,110 = 6,898.5 kWh = £1,817.66
• ✅ Sta-Rite HD: 1.1 kW × 5,110 = 5,621 kWh = £1,481.13

💰 Annual saving: £336.53

📈 5-year savings: £1,682.65

⏱️ Payback period: approximately 2 years

📍 Scenario: Total Cost of Ownership – Budget vs Premium

Commercial facilities must consider total cost of ownership, not just purchase price.

10-year comparison (14 hours/day, 365 days/year = 5,110 hours annually):

Factor	Budget 3-Phase Pump	Sta-Rite HD 3-Phase
Purchase price	£500	£674.00
Efficiency class	IE2	IE3
Power consumption	1.20 kW	1.1 kW
Annual energy cost	£1,614.76	£1,481.13
10-year energy cost	£16,147.60	£14,811.30
Expected lifespan	6–8 years	12–18 years
Replacement cost (year 7)	£550	£0
10-year total cost	£17,197.60	£15,485.30

💷 10-year saving with Sta-Rite HD: £1,712.30

Plus avoided downtime and replacement hassle

📍 Scenario: IE3 vs IE2 Efficiency Over Time

The IE3 efficiency rating delivers measurable savings that compound over years of operation.

Annual savings calculation:

Efficiency Class	Typical Motor Efficiency	Effective Draw (1.1 kW rated)	Annual kWh (5,110 hrs)	Annual Cost
IE2	84%	1.14 kW	5,825 kWh	£1,534.89
IE3	87%	1.10 kW	5,621 kWh	£1,481.13

💰 Annual saving from IE3: £53.76

📈 15-year saving: £806.40

📥 Downloads & Resources

📄 Pentair Sta-Rite HD Technical Datasheet – Complete specifications, dimensional drawings, and performance curves for all Sta-Rite HD models (PDF)

🏆 Why Choose the Pentair Sta-Rite HD 1.5 HP Three Phase?

✅ IE3 Premium Efficiency – Highest European motor efficiency classification delivers measurable energy savings over years of operation

✅ Three-Phase Reliability – Balanced power delivery provides smoother operation, reduced vibration, and significantly extended motor lifespan

✅ European Manufacturing Excellence – 100% made in Pentair’s Italian facility with rigorous commercial-grade quality control

✅ Commercial-Grade Durability – Engineered for extended daily operation with heavier 29 kg construction built to last

✅ XL Pre-Filter Basket – Essential for commercial facilities managing high debris loads and demanding maintenance schedules

✅ Premium SKF Bearings – Automotive-grade bearings deliver exceptional longevity in demanding commercial applications

✅ Saltwater Ready – Certified 0.40% salt resistance for commercial salt chlorination installations

✅ Comprehensive 3-Year Warranty – Commercial-grade coverage reflecting Pentair’s confidence in build quality

🏗️ Why Buy From Parts4Tubs?

✅ Authorised Pentair Stockist – Genuine products with full UK manufacturer warranty coverage

✅ Commercial Expertise – Technical knowledge of three-phase installations and commercial pool requirements

✅ Competitive Trade Pricing – Professional prices available to all customers without account requirements

✅ Fast UK Delivery – In-stock items dispatched promptly with reliable nationwide courier service

✅ Commercial Account Options – Volume pricing and account facilities available for trade customers

✅ No-Hassle Returns – Simple returns process if products don’t meet your expectations

✨ Summary

The Pentair Sta-Rite HD 1.5 HP Three Phase Pump brings IE3 premium efficiency and commercial-grade reliability to professional pool installations. With 26 m³/hr flow, Italian manufacturing excellence, and the superior durability of three-phase motor technology, this pump delivers years of dependable service in demanding commercial environments. The IE3 efficiency rating ensures compliance with energy standards whilst delivering measurable operating cost savings. Annual running costs from approximately £730 for seasonal commercial use, combined with potential 10-year savings of £1,700+ versus budget alternatives, make the Sta-Rite HD 1.5 HP Three Phase a smart long-term investment for commercial pool operators.