💧 Pentair La Sta-Rite 5P2R 1.5HP Single Phase Pool Pump (5P2RF-1) – 18m³/hr Flow Rate

🚀 The Flagship Single-Phase Pump – Maximum Power for Large Pools & Commercial Installations

📋 Product Overview

The Pentair La Sta-Rite 5P2RF-1 represents the pinnacle of the single-phase 5P2R series – a formidable 1.5HP swimming pool pump engineered and manufactured at Pentair’s renowned facility in Pisa, Italy. Delivering an impressive 18m³/hr flow rate at 10m head with maximum flow capability reaching 22m³/hr, this is the pump of choice when serious circulation power is required.

Engineered around a heavy-duty 1.1kW induction asynchronous motor, the 5P2RF-1 features the same premium construction that defines the Sta-Rite range: bi-material shaft design with stainless steel 304 shaft-end, permanently lubricated SKF sealed bearings, and comprehensive thermal overload protection. The result is a pump that delivers exceptional power without sacrificing the reliability that professionals demand.

The salt-resistant construction handles concentrations exceeding 0.4%, ensuring compatibility with both traditional chlorine and saltwater pool systems. Whether you’re circulating a large residential pool, powering a commercial installation, or driving demanding water features, the 5P2RF-1 delivers the flow and head pressure to get the job done.

Backed by a comprehensive 3-year manufacturer’s warranty including bearings, this flagship single-phase pump offers the ultimate combination of power, efficiency, and Italian engineering excellence.

⭐ Key Features

✅ Maximum Single-Phase Power (1.5HP/1.1kW) – The most powerful pump in the single-phase 5P2R range, delivering uncompromising circulation performance

✅ Exceptional 18m³/hr Flow Rate – High-capacity circulation for large pools up to 110,000 litres, with maximum flow capability reaching 22m³/hr

✅ Italian Manufacturing Excellence – Precision-engineered at Pentair’s Pisa facility to exacting European quality standards with full CE compliance

✅ Self-Priming Diffuser Design – Industry-leading priming speed with performance unmatched by competitors – gets your system running faster

✅ Premium SKF Sealed Bearings – Industrial-grade, permanently lubricated bearings engineered for extended service life and quiet operation under heavy loads

✅ Bi-Material Shaft with Stainless Steel 304 End – Superior corrosion resistance engineered to withstand chlorine, saltwater, and aggressive chemical environments

✅ Salt-Resistant Construction (>0.4%) – Purpose-built for saltwater chlorination systems with comprehensive corrosion protection

✅ Built-In Thermal Overload Protection – Essential safeguard for high-power motors, automatically protecting against overheating damage

✅ “See-Thru” Trap Lid – Transparent cover rated to 4 bar test pressure provides instant visual confirmation when cleaning is required

✅ Exclusive 5″ Lock-In Basket – Large capacity strainer captures debris efficiently, critical for high-flow applications

✅ IP-55 Motor Protection – Dust-tight and water-jet resistant enclosure for demanding outdoor and plant room environments

✅ “Hi-Rise” Mounting Base – Elevated design provides maximum protection against ground moisture, flooding, and contaminants

✅ 3-Year Manufacturer’s Warranty – Comprehensive coverage including bearings demonstrates exceptional confidence in build quality

🔧 Technical Specifications

Specification	Detail
Model Number	5P2RF-1
Motor Power	1.5 HP (1.10 kW)
Power Input (P1)	1,430W
Power Output (P2)	1,100W
Phase	Single Phase
Voltage	220-240V / 50Hz
Motor Speed	2,850 RPM
Flow Rate @ 10m Head	18 m³/hr
Maximum Flow Rate	22 m³/hr
Maximum Head	22.5 metres
Suction Port	1½” BSP
Discharge Port	1½” BSP
Strainer Basket Size	5″ (127mm)
Salt Resistance	>0.4% concentration
Protection Rating	IP-55 (motor) / IP-X5 (pump)
Insulation Class	F
Max Liquid Temperature	52°C
Max Ambient Temperature	50°C
pH Operating Range	4-9
Bearing Type	SKF Sealed (permanently lubricated)
Shaft Material	Stainless Steel 304
Impeller Material	Glass-filled Lexan
Body Material	Fiberglass-reinforced thermoplastic
Mechanical Seal	Carbon/Ceramic/Stainless Steel
Manufacturing Location	Pisa, Italy
Warranty	3 years (90 days on mechanical seal)

💰 Usage Costs & Running Expenses

High-performance pumps require careful consideration of running costs. The Sta-Rite 5P2RF-1’s 1.43kW power input delivers maximum circulation power while maintaining competitive efficiency for its class.

📊 Annual Running Cost Calculation

Power consumption: 1.43 kW (input power) UK electricity rate: £0.2635 per kWh (Ofgem Price Cap, Q4 2025)

🏊 Scenario 1: Large Residential Pool (Seasonal Use)

• Usage: 8 hours/day × 180 days (April–September)
• Total hours: 1,440 hours/year
• ✅ Annual running cost: 1.43 kW × 1,440 hrs × £0.2635 = £542.76

☀️ Scenario 2: Extended Season Operation

• Usage: 8 hours/day × 240 days (March–October)
• Total hours: 1,920 hours/year
• ✅ Annual running cost: 1.43 kW × 1,920 hrs × £0.2635 = £723.68

🏢 Scenario 3: Commercial Pool (Full Season)

• Usage: 10 hours/day × 200 days
• Total hours: 2,000 hours/year
• ✅ Annual running cost: 1.43 kW × 2,000 hrs × £0.2635 = £753.61

♨️ Scenario 4: Year-Round Indoor Pool or Leisure Facility

• Usage: 8 hours/day × 365 days
• Total hours: 2,920 hours/year
• ✅ Annual running cost: 1.43 kW × 2,920 hrs × £0.2635 = £1,100.27

🌊 Scenario 5: Water Feature/Fountain (Seasonal Display)

• Usage: 12 hours/day × 150 days (peak season)
• Total hours: 1,800 hours/year
• ✅ Annual running cost: 1.43 kW × 1,800 hrs × £0.2635 = £678.25

⚡ Energy Efficiency Comparison

Pump Type	Power Input	Annual Cost (1,440 hrs)	vs. 5P2RF-1
✅ Sta-Rite 5P2RF-1	1.43 kW	£542.76	—
❌ Older 1.5HP pump	1.70 kW	£645.04	+£102.28/year
❌ Oversized 2.0HP pump	2.10 kW	£796.82	+£254.06/year
❌ Budget 1.5HP pump	1.65 kW	£626.07	+£83.31/year

💡 Key Insight: The 5P2RF-1’s modern motor design extracts maximum hydraulic performance from every watt consumed. Compared to older or less efficient 1.5HP pumps, annual savings of £80-£100+ are achievable – significant over the pump’s 10-15 year potential lifespan.

🎯 Real World Examples & Applications

🏊‍♂️ Large Residential Swimming Pools

The 18m³/hr flow rate is perfectly matched to large family pools between 80,000 and 110,000 litres, delivering complete water turnover every 4.5-6 hours as recommended by industry standards. Ideal for substantial pools measuring 12m × 6m or larger, L-shaped pools, and those with integrated spa sections requiring additional circulation capacity.

🏢 Commercial Pool Installations

Purpose-built for small to medium commercial applications including hotel pools, leisure centre teaching pools, health club facilities, and apartment complex pools. The robust construction, thermal protection, and extended warranty provide the reliability that commercial operators demand. Single-phase power supply simplifies installation in many commercial settings.

🌊 Counter-Current & Endless Pool Systems

Where powerful water jets are required for counter-current swimming or endless pool installations, the 5P2RF-1 delivers the high flow rates and head pressure essential for effective swim-in-place performance. The 22.5m maximum head capability ensures consistent jet power even with complex pipework configurations.

🎪 Water Features & Large Fountains

The exceptional flow and head characteristics make this pump ideal for ambitious water features – large ornamental fountains, commercial cascade displays, hotel lobby water walls, and public space water art installations. The quiet motor operation and reliable performance are essential for features in high-visibility locations.

🏨 Holiday Parks & Glamping Sites

For holiday park pools, glamping site swimming facilities, and caravan park pools where reliability during peak season is critical, the 5P2RF-1 offers the robust performance and comprehensive warranty coverage that minimises costly mid-season failures and guest complaints.

🔄 Heavy-Duty Replacement & Upgrades

As a direct replacement for ageing high-capacity pumps or as an upgrade from struggling undersized units, the 5P2RF-1 offers modern efficiency with proven Sta-Rite reliability. Standard 1½” BSP connections ensure compatibility with existing pipework installations.

🛁 Large Commercial Swim Spas

For commercial-grade swim spas and plunge pools requiring dedicated high-capacity circulation, the 5P2RF-1 provides the continuous-duty performance and flow rates these demanding applications require.

💡 Cost Savings Examples

📍 Scenario: Replacing an Ageing Commercial-Grade Pump

The situation: Your 12-year-old 1.5HP commercial pool pump is becoming unreliable, running hot, and energy consumption has increased noticeably.

Factor	❌ Ageing 1.5HP Pump	✅ New 5P2RF-1
Power consumption	~1.75 kW (degraded)	1.43 kW
Annual energy cost (2,000 hrs)	£922.25	£753.61
Reliability	Frequent issues	3-year warranty
Noise level	Increasingly loud	Quiet operation
Risk of failure	High	Minimal

💰 Annual energy saving: £168.64 📈 5-year energy saving: £843.20 💷 10-year energy saving: £1,686.40 ⏱️ Payback period: Under 2 years on energy savings alone

📍 Scenario: Downsizing from an Oversized 2.0HP Pump

The situation: Your pool installer fitted a 2.0HP pump “for maximum performance” but your 90,000-litre pool only requires 15-18m³/hr circulation.

Factor	❌ Oversized 2.0HP	✅ Right-Sized 5P2RF-1
Power consumption	2.10 kW	1.43 kW
Annual energy cost	£796.82	£542.76
Actual flow needed	15-18 m³/hr	18 m³/hr ✅
Excess capacity	Wasted energy	Optimal match
Filter/heater stress	Excessive	Normal

💰 Annual energy saving: £254.06 📈 5-year energy saving: £1,270.30 💷 10-year saving: £2,540.60

💡 Critical insight: Oversized pumps don’t clean pools better – they simply waste electricity, accelerate filter wear, and create unnecessary noise. The 5P2RF-1 delivers the flow you actually need at significantly lower cost.

📍 Scenario: New Large Pool Installation (100,000 Litres)

The situation: You’re installing a new 12m × 5m × 1.7m average depth pool (approximately 102,000 litres) and need to select the optimal pump.

Circulation requirement: Pool volume ÷ 5.5 hours = 18,500 litres/hr ≈ 18.5m³/hr 5P2RF-1 delivery: 18m³/hr at 10m head ✅ Excellent match

Pump Option	Flow Rate	Annual Cost (1,440 hrs)	Assessment
❌ 1.0HP pump	15 m³/hr	£447.78	Undersized – inadequate
✅ 5P2RF-1 (1.5HP)	18 m³/hr	£542.76	Optimal choice
❌ 2.0HP pump	22+ m³/hr	£796.82	Oversized – excessive

💡 Recommendation: For pools above 80,000 litres, the 5P2RF-1 provides the necessary circulation capacity without the energy penalty of oversized alternatives.

📍 Scenario: Small Hotel Pool – ROI Analysis

The situation: A 25-room boutique hotel needs to replace its failing pool pump before the summer season. Pool size: 85,000 litres.

Operating parameters: 10 hours/day × 200 days (season) = 2,000 hours/year

Cost Factor	❌ Budget 1.5HP	✅ Sta-Rite 5P2RF-1
Purchase price	Lower	Moderate
Annual energy cost	£626.07	£753.61*
Typical lifespan	4-6 years	10-15 years
Warranty	1 year	3 years
Mid-season failure risk	Higher	Minimal
Guest complaint risk	Higher	Minimal

*Note: Energy cost comparison assumes budget pump at 1.65kW vs Sta-Rite at 1.43kW – the Sta-Rite actually costs £126.54 LESS annually despite similar HP rating.

Corrected comparison:

Cost Factor	❌ Budget 1.5HP (1.65kW)	✅ Sta-Rite 5P2RF-1 (1.43kW)
Annual energy cost	£869.55	£753.61
Annual saving	—	£115.94

💰 Annual energy saving: £115.94 📈 5-year saving: £579.70 💷 Avoided emergency repair: £300-500+ per incident ⚠️ Reputational cost of pool closure: Incalculable

📍 Scenario: Water Feature Installation – Theme Park

The situation: A visitor attraction requires a reliable pump for a prominent water feature display operating 12 hours daily during the 150-day peak season.

Factor	Requirement	5P2RF-1 Capability
Flow rate needed	16-18 m³/hr	18 m³/hr ✅
Head pressure required	15m	22.5m max ✅
Operating hours	1,800/year	Continuous duty ✅
Reliability requirement	Critical	3-year warranty ✅
Noise constraints	Low noise essential	Quiet operation ✅

✅ Annual running cost: £678.25 ✅ Comprehensive warranty coverage ✅ Italian engineering reliability

📥 Downloads & Resources

📄 Sta-Rite 5P2R Series Technical Manual – Comprehensive 12-page manual covering the complete 5P2R range including the flagship 5P2RF-1 model

Manual Contents Include:

• Complete specifications for all 5P2R series models (0.25HP to 1.5HP)
• Performance curves showing flow rates across the full head range
• Electrical wiring diagrams for single-phase (220-240V) installation
• Detailed installation guidelines including piping recommendations
• Pump priming, startup, and commissioning procedures
• Winterisation, storage, and seasonal shutdown instructions
• Step-by-step mechanical seal replacement procedures
• Comprehensive troubleshooting guide for common issues
• Exploded parts diagram with individual part numbers
• Seal and gasket kit information (Parts-Pak No. PP 1000)

🏅 Why Buy From Parts4Tubs?

✅ Genuine Pentair/Sta-Rite Product – Authentic Italian-manufactured pump with full manufacturer warranty and support, not grey imports or refurbished units

✅ Expert Technical Support – Our experienced team provides guidance on pump sizing, installation requirements, electrical considerations, and troubleshooting

✅ Comprehensive Spare Parts Stock – Full range of 5P2R series spares including mechanical seals, strainer baskets, lids, O-rings, impellers, and diffusers for lifetime maintenance support

✅ Competitive Commercial Pricing – Professional trade and retail pricing that recognises the value of genuine quality

✅ Fast UK Delivery – Stock items dispatched promptly to minimise costly pool downtime

✅ Full Warranty Administration – We handle warranty claims directly with Pentair, providing hassle-free support when you need it

✨ Summary

The Pentair La Sta-Rite 5P2RF-1 stands as the flagship of the single-phase 5P2R series – delivering maximum 18m³/hr circulation power for large residential pools, commercial installations, and demanding water features. With its efficient 1.43kW motor, premium SKF bearings, comprehensive thermal protection, and salt-resistant construction, this 1.5HP pump offers annual energy savings of £80-£250 compared to older or oversized alternatives. Backed by Italian engineering excellence and a 3-year manufacturer’s warranty, the 5P2RF-1 is the professional’s choice when uncompromising performance and long-term reliability matter most.