💧 Sta-Rite SR150N 1.5HP (1.1kW) Single Phase Pool Pump | Professional 1.5″ Residential Circulation

Engineered excellence for residential pools – powerful circulation with proven Pentair reliability

📋 Product Overview

The Sta-Rite SR150N represents the gold standard in residential pool circulation, combining 1.5 horsepower (1.1kW) of reliable single-phase power with Italian-engineered precision manufacturing. Part of the renowned 5P2R series from Pentair’s Pisa facility, this pump delivers exceptional performance for larger domestic pools and hot tubs requiring professional-grade circulation.

Built from reinforced fiberglass thermoplastic with corrosion-resistant stainless steel internals, the SR150N offers the perfect balance of power and efficiency for homeowners who demand reliability. With 1.5″ BSP connections and a generous 5″ strainer basket, this pump handles substantial flow volumes whilst maintaining whisper-quiet operation and years of trouble-free service.

Ideal for: Large residential swimming pools (30-80m³), domestic hot tubs, substantial spa installations, and pool owners upgrading from undersized or aging circulation equipment.

⭐ Key Features

✅ 1.5HP Single-Phase Motor – Powerful 1.1kW continuous-duty motor engineered for residential installations, delivering up to 20m³/h flow capacity with exceptionally quiet operation even at full load

✅ 100% Italian Manufacturing – Precision-engineered and manufactured in Pentair’s ISO-certified Pisa facility, ensuring consistent quality control and genuine OEM components throughout

✅ Reinforced Fiberglass Construction – Advanced thermoplastic body precision-moulded from reinforced fiberglass provides superior temperature resistance, chemical compatibility, and structural integrity for high-pressure operations

✅ Premium Stainless Steel Components – High-grade AISI 304 stainless steel motor shaft and internal components resist corrosion from pool chemicals and ensure decades-long operational life

✅ XL 5″ Strainer Basket – Oversized lock-in basket with see-through inspection lid captures more debris, extends cleaning intervals, and allows visual monitoring without opening the housing

✅ Self-Priming Diffuser Design – Innovative diffuser technology enables rapid priming (typically under 5 minutes) even with suction lifts up to 2.5 meters, simplifying installation and seasonal startups

✅ ‘Hi-Rise’ Mounting Base – Elevated base design provides stability whilst allowing easy access to all serviceable components via quick-release stainless steel pump clamp

✅ Sealed Ball Bearing System – Permanently lubricated SKF sealed bearings eliminate maintenance requirements whilst ensuring smooth, vibration-free operation throughout the pump’s service life

✅ Advanced Mechanical Seal – Precision-lapped carbon ceramic stainless steel seal provides maximum drip-proof protection, eliminating leaks and preventing premature component degradation

✅ Thermal Protection – Integrated thermal overload protection safeguards the motor against damage from overheating, blocked flow conditions, or electrical anomalies

🔧 Technical Specifications

Specification	Detail
Model Number	SR150N (P-STR-151)
Motor Power	1.5HP (1.1kW)
Phase	Single Phase (220-240V, 50Hz)
Flow Capacity	Up to 20 m³/h @ 8m head
Port Size	1.5″ BSP threaded connections
Union Diameter	50mm internal (unions included)
Strainer Basket	5″ diameter lock-in design
Basket Material	Transparent high-impact thermoplastic
Pressure Rating	4 bar test pressure capability
Impeller Material	Glass-filled polycarbonate
Motor Shaft	Bi-material with AISI 304 stainless steel
Seal Type	Carbon ceramic stainless steel mechanical seal
Bearings	SKF sealed, permanently lubricated
IP Rating	IP-X5 (water jet protected)
Salt Compatibility	Up to 0.40% (4 g/L) – not suitable for high-salt systems
Pump Dimensions	288mm (W) × 544mm (L) × 309mm (H)
Weight	17kg
Maximum Suction Lift	2.5 meters
Noise Level	Exceptionally quiet operation
Standards Compliance	EN 60335-1, EN 60335-2-41, CE marked

💰 Usage Costs & Running Expenses

📊 Annual Running Cost Calculation

Power consumption: 1.1 kW
Typical pool season: 6 months (April-September)
Average daily operation: 8 hours
Total annual hours: 8 hours × 180 days = 1,440 hours
Current UK electricity rate: £0.26 per kWh (Q4 2025 average)

✅ SR150N Annual Cost: 1.1 kW × 1,440 hours × £0.26 = £411.84 per year

💷 Cost Comparison: Upgrading From Older Technology

❌ Scenario: Older 2.0HP Single-Phase Pump (1.5kW)

Many homeowners still operate oversized or inefficient pumps from 10-15 years ago:

Old pump consumption:

• Power: 1.5 kW
• Annual operation: 1.5 × 1,440 × £0.26 = £561.60

Savings with SR150N:
💵 Annual saving: £149.76
⏱ Payback period: Approximately 3-4 years (considering installation)
📈 5-year total saving: £748.80

The SR150N delivers superior flow performance whilst consuming 27% less energy – a compelling upgrade for any pool with aging or oversized circulation equipment.

❌ Scenario: Continuous 24-Hour Operation (Hot Tub Application)

Some hot tub installations run pumps continuously for heating and circulation:

24-hour operation:

• Hours per year: 24 × 365 = 8,760 hours
• ✅ SR150N annual cost: 1.1 × 8,760 × £0.26 = £2,506.32

Compared to 2HP pump:

• ❌ 2HP annual cost: 1.5 × 8,760 × £0.26 = £3,415.20
• 💰 Saving: £908.88 annually

For continuous-duty applications, proper motor sizing becomes even more critical – the SR150N’s efficient 1.1kW motor significantly reduces operational costs without sacrificing performance.

⚡ Energy Efficiency Benefits

✅ Right-Sized Power: 1.5HP provides ample capacity for 30-80m³ pools without wasteful oversizing common in older installations
✅ Thermal Protection: Prevents energy waste from motor overheating and premature component failure
✅ High-Efficiency Design: Modern impeller and diffuser geometry maximize hydraulic efficiency, reducing electricity consumption
✅ Self-Priming Operation: Quick startup eliminates extended priming periods that waste energy
✅ Future-Proof Investment: Protection against rising UK energy costs – every kWh saved becomes more valuable over time

🎯 Real World Applications

🏊 Residential Swimming Pools (30-80m³)

Perfect for larger domestic pools requiring professional circulation performance. The SR150N handles substantial water volumes efficiently, maintaining crystal-clear water through effective filtration turnover. Its 1.5″ connections accommodate appropriately-sized plumbing whilst the 20m³/h flow capacity ensures complete water circulation every 4-6 hours in typical installations.

Typical installation: Above-ground pools, in-ground vinyl liner pools, concrete pools up to 80m³, pools with waterfalls or elevated features requiring additional head pressure.

🛁 Large Domestic Hot Tubs & Swim Spas

Ideal for substantial hot tub installations and swim spas requiring consistent circulation and filtration. The SR150N’s continuous-duty motor and thermal protection enable reliable 24/7 operation when paired with appropriate timer controls. Its quiet operation suits residential environments where noise concerns are paramount.

Performance expectations: Maintains water clarity and heating efficiency through consistent circulation, handles chemical distribution effectively, supports both low-speed circulation and filtration modes.

🏠 Pool System Upgrades & Replacements

Excellent choice when replacing failing pumps or upgrading undersized circulation equipment. The standardized 1.5″ BSP connections simplify installation into existing plumbing, whilst the Hi-Rise mounting base provides installation flexibility. Homeowners upgrading from 1HP or oversized 2HP+ equipment appreciate the optimized performance-to-efficiency ratio.

Installation considerations: Minimal plumbing modifications required, compatible with standard pool filtration equipment, straightforward electrical connection for qualified installers, seasonal winterization simplified by drain plugs.

🔄 Seasonal Pool Operations

Designed for UK climate seasonal pool use with comprehensive winterization features. The pump easily drains completely via removable plugs, protecting against freeze damage during winter shutdown. Self-priming capability ensures quick startup when commissioning for the new season.

Maintenance expectations: Weekly basket cleaning during active season, end-of-season full drainage and storage, annual seal inspection, long service life with minimal intervention requirements.

💡 Cost Savings Examples

📍 Scenario: Replacing 15-Year-Old 2HP Pump

Situation: Homeowner with 60m³ in-ground pool currently running an aging 2HP pump operating 10 hours daily during 6-month season

Current costs:

• ❌ Old 2HP pump: 1.5 kW × (10 hours × 180 days) × £0.26 = £702.00 annually

After SR150N upgrade:

• ✅ SR150N: 1.1 kW × (10 hours × 180 days) × £0.26 = £514.80 annually
• 💰 First-year saving: £187.20
• ⏱ Payback: 2.5-3 years (including professional installation)
• 📈 10-year total saving: £1,872.00

Additional benefits: Quieter operation, modern thermal protection, warranty coverage, elimination of replacement parts sourcing issues for obsolete equipment.

📍 Scenario: Hot Tub Continuous Operation Optimization

Situation: Hot tub owner currently running 2HP pump 24/7 for circulation and heating support

Current costs:

• ❌ 2HP pump continuous: 1.5 kW × 8,760 hours × £0.26 = £3,415.20 annually

Optimized with SR150N:

• ✅ SR150N continuous: 1.1 kW × 8,760 hours × £0.26 = £2,506.32 annually
• 💰 Annual saving: £908.88
• 💷 5-year total saving: £4,544.40

For continuous-duty applications, the £900+ annual savings dramatically improve the economics of hot tub ownership whilst maintaining excellent water quality.

📍 Scenario: New Pool Installation – Right Sizing Matters

Comparison: Installing appropriate 1.5HP pump versus common practice of oversizing to 2.5HP

Over-specified approach:

• ❌ 2.5HP pump: 1.9 kW × 1,440 hours × £0.26 = £711.36 annually

Correctly specified:

• ✅ SR150N 1.5HP: 1.1 kW × 1,440 hours × £0.26 = £411.84 annually
• 💰 Annual saving from correct sizing: £299.52
• 📊 Additional benefits: Reduced strain on plumbing, quieter operation, extended equipment life, lower installation costs

Proper pump sizing during new installations pays dividends throughout the system’s lifetime – the SR150N provides excellent performance for 30-80m³ pools without wasteful oversizing.

📥 Downloads & Resources

📄 Installation & User Manual

Complete installation and user’s guide covering single-speed Sta-Rite pumps including SuperFlo, UltraFlow, WhisperFlo, and Pantera series. Comprehensive safety instructions, installation guidelines, electrical connection diagrams, troubleshooting procedures, and maintenance schedules (PDF, multilingual)
Download Installation Manual

📄 Product Technical Datasheet

Official Pentair technical specification sheet for the La Sta-Rite 5P2R series including the SR150N model. Detailed performance curves, dimensions, electrical specifications, features overview, and application guidelines (PDF, 1 page)
Download Technical Datasheet

🏆 Why Choose the Sta-Rite SR150N?

✅ Proven Pentair Engineering – Backed by decades of pool equipment innovation and supported by Pentair’s international service network, ensuring long-term parts availability and technical support

✅ Genuine Italian Manufacturing – 100% manufactured in Pentair’s ISO-certified Pisa facility with rigorous quality control – not outsourced production or rebranded alternatives

✅ Professional-Grade Components – Premium SKF bearings, AISI 304 stainless steel, precision-moulded fiberglass construction, and carbon ceramic seals typically found only in commercial-grade equipment

✅ Long-Term Value – Exceptional build quality translates to 15-20+ year operational life with minimal maintenance – far exceeding budget alternatives that require replacement every 5-7 years

✅ Energy Efficiency – Right-sized 1.1kW motor delivers optimal performance without wasteful oversizing, protecting against escalating UK electricity costs year after year

✅ Comprehensive Safety Features – Thermal overload protection, sealed electrical components (IP-X5), CE certification, and full compliance with UK/EU electrical safety standards

🎁 Why Buy From Parts4Tubs?

✅ Expert Technical Guidance – Knowledgeable staff help ensure correct pump selection for your specific application
✅ Competitive Pricing – Direct distribution relationships deliver excellent value on premium equipment
✅ Fast UK Delivery – Efficient logistics get your equipment to site quickly and safely
✅ Comprehensive Product Range – Complete hot tub and pool solutions from leading manufacturers
✅ After-Sales Support – Ongoing technical assistance and genuine replacement parts availability

✨ Summary

The Sta-Rite SR150N represents the optimal choice for homeowners seeking professional-grade pool circulation with residential electrical compatibility. Its 1.5HP single-phase motor delivers powerful 20m³/h flow capacity whilst the premium Italian construction ensures decades of reliable service. From reinforced fiberglass housing to precision-engineered internals, every component reflects Pentair’s commitment to excellence.

Whether replacing aging equipment, upgrading an undersized pump, or specifying new installations, the SR150N offers compelling economics through reduced energy consumption, minimal maintenance requirements, and exceptional longevity. With annual operating costs under £415 for typical seasonal use and potential savings exceeding £150 annually versus older technology, this pump delivers both immediate performance and long-term value.

Important Note: The SR150N is not suitable for salt-chlorinated pools or hot tubs. For salt water applications up to 0.40% (4g/L), choose Pentair’s “SW” designated models specifically engineered for enhanced salt resistance.