💧 Hayward K-Flo Pool Pump – 1.5hp Single Phase (21.9m³/hr) | SPK12615XY1

High-Performance Pool Circulation with Whisper-Quiet Operation and Tool-Free Maintenance Access

📋 Product Overview

The Hayward K-Flo SPK12615XY1 represents the pinnacle of single-phase pool pump engineering, delivering an impressive 21.9m³/hr flow rate with exceptional energy efficiency. This 1.5hp powerhouse combines robust construction with user-friendly design features that simplify maintenance and reduce long-term ownership costs.

Built with Hayward’s renowned commitment to quality, the K-Flo series features a corrosion-proof seal assembly and Noryl® impeller technology, making it ideal for both freshwater and saltwater pool installations. The innovative Twist-Lock strainer cover provides instant access for debris removal without requiring any tools, while the see-through lid allows quick visual inspection of the strainer basket.

Designed for pools up to 131m³ (based on 6-hour turnover), this pump delivers reliable water circulation with remarkably quiet operation, making it perfect for residential installations where noise levels matter. The included union fittings and 63mm to 2″ conversion capability ensure compatibility with virtually any existing plumbing configuration.

⭐ Key Features

✅ Tool-Free Twist-Lock Cover Design – Rapid access to the strainer basket without any tools required, cutting maintenance time significantly and making debris removal a simple 30-second task

✅ Noryl® Impeller and Diffuser Construction – Exceptionally hard-wearing and corrosion-free components that maintain peak efficiency throughout the pump’s lifespan, even in demanding chemical environments

✅ Full Salt Water Compatibility – AISI 316 stainless steel mechanical seal and corrosion-proof seal assembly allows trouble-free operation in chlorinated saltwater systems up to standard concentrations

✅ Direct KS Pump Replacement – Engineered as a drop-in replacement for legacy KS series pumps, eliminating the need for costly plumbing modifications during upgrade installations

✅ Complete Union Fittings Included – 63mm unions supplied as standard, with 63mm to 2″ conversion shim provided for flexible installation options across different pipework configurations

✅ Whisper-Quiet Operation – Advanced motor design and balanced impeller assembly deliver powerful circulation with minimal noise disturbance, ideal for residential pool environments

✅ See-Through Strainer Lid – SAN® transparent lid construction allows instant visual inspection of basket fill levels without opening the housing

✅ Double Drain System – Easy-opening drain plugs (no tools required) simplify winterisation and maintenance procedures

✅ IP55 Protection Rating – Dust-protected and water-resistant motor housing suitable for outdoor installation in typical pool plant room environments

✅ 3-Year Manufacturer Warranty – Comprehensive coverage backed by Hayward’s global service network (excludes capacitors and mechanical seals)

🔧 Technical Specifications

Specification	Detail
Model Number	SPK12615XY1
Motor Power	1.5 HP
Input Power (P1)	1610W (1.61 kW)
Output Power (P2)	1110W
Maximum Flow Rate	21.9 m³/hr
Operating Amperage	7.5A
Voltage	Single Phase 230V/50Hz
Connection Size	63mm (unions included)
Total Weight	16.5 kg
Side A Length	620mm
Overall Dimensions	620mm × 302mm × 311.7mm
Maximum Water Temperature	35°C
Motor Protection Rating	IP55
Motor Insulation Class	Class F
Housing Material	PP+GF (Polypropylene + Glass Fibre)
Impeller Material	Noryl®+GF
Diffuser Material	Noryl®+GF
Strainer Lid Material	SAN® (transparent)
Mechanical Seal	AISI 316 Stainless Steel
Recommended Pool Size	Up to 131m³ (6-hour turnover)
Maximum Pool Size	Up to 195m³ (extended turnover)
Warranty Period	3 Years

💰 Usage Costs & Running Expenses

Understanding the true cost of pool pump ownership requires looking beyond the purchase price. Here’s a comprehensive breakdown of what you can expect to spend operating the Hayward K-Flo 1.5HP.

📊 Annual Running Cost Calculation

Based on the pump’s input power consumption and current UK energy prices:

Key Assumptions:

• Input Power: 1.61 kW
• Current UK Electricity Rate: £0.2635 per kWh (Q4 2025 Ofgem price cap)
• Swimming Season: 180 days (April to September)

🏊 Standard Residential Pool Usage (8 hours daily, seasonal)

Component	Calculation	Annual Cost
Daily Energy Consumption	1.61 kW × 8 hours = 12.88 kWh
Seasonal Running Hours	8 hours × 180 days = 1,440 hours
Annual Energy Consumption	1.61 kW × 1,440 hours = 2,318 kWh
✅ Annual Running Cost	2,318 kWh × £0.2635 =	£610.79

♨ Extended Season Usage (10 hours daily, 240 days)

For heated pools or extended swimming seasons:

Component	Calculation	Annual Cost
Daily Energy Consumption	1.61 kW × 10 hours = 16.1 kWh
Extended Running Hours	10 hours × 240 days = 2,400 hours
Annual Energy Consumption	1.61 kW × 2,400 hours = 3,864 kWh
✅ Annual Running Cost	3,864 kWh × £0.2635 =	£1,018.16

🏢 Commercial/Heavy Usage (12 hours daily, year-round)

For commercial pools, leisure centres, or holiday let properties:

Component	Calculation	Annual Cost
Daily Energy Consumption	1.61 kW × 12 hours = 19.32 kWh
Year-Round Running Hours	12 hours × 365 days = 4,380 hours
Annual Energy Consumption	1.61 kW × 4,380 hours = 7,052 kWh
✅ Annual Running Cost	7,052 kWh × £0.2635 =	£1,858.20

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🎯 Real World Examples & Applications

🏊‍♂ Large Residential Swimming Pools

The 21.9m³/hr flow rate makes the K-Flo 1.5HP ideal for pools between 80-130m³ capacity. A typical 10m × 5m pool (approximately 75-90m³) achieves complete water turnover in around 4 hours, exceeding health and safety recommendations. The quiet operation ensures poolside relaxation isn’t disturbed by plant room noise.

🌊 Salt Water Pool Installations

With its AISI 316 stainless steel mechanical seal and corrosion-proof construction, this pump thrives in saltwater environments. The Noryl® impeller resists the corrosive effects of chlorine generators, typically lasting 3-5 years longer than standard plastic impellers in salt chlorinated systems.

🔄 Upgrade and Replacement Projects

Designed as a direct replacement for Hayward KS series pumps, the K-Flo drops straight into existing installations. The Smart Retrofit Kit (LPRK) extends compatibility to replace Astral Victoria Plus, Victoria Plus Silent, and Saci Winner pumps on 50mm pipework installations, making upgrades straightforward without major plumbing work.

🏢 Holiday Let and Rental Properties

The tool-free maintenance design is particularly valuable for properties managed remotely. Guests or local maintenance teams can easily check and empty the strainer basket, reducing call-out requirements. The robust construction handles the variable usage patterns typical of rental properties.

☀ Seasonal Pool Operations

For pools operating April to September, the K-Flo’s reliable starting characteristics after winter lay-up are essential. The double drain system with easy-open plugs simplifies winterisation, while the IP55-rated motor housing protects against moisture ingress during off-season storage.

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💡 Cost Savings Examples

📍 Scenario 1: Upgrading from an Older 2HP Single-Speed Pump

Many pools are over-pumped with legacy 2HP motors that consume significantly more energy than necessary.

Comparison	Old 2HP Pump	Hayward K-Flo 1.5HP
Input Power	2.2 kW (typical)	1.61 kW
Seasonal Energy Use (1,440 hrs)	3,168 kWh	2,318 kWh
❌ Old Annual Cost	£834.77
✅ New Annual Cost		£610.79
💰 Annual Saving		£223.98
📈 5-Year Saving		£1,119.90

⏱ Payback Period: If upgrading from an inefficient older pump, the energy savings alone can recoup the pump cost within 2-3 years.

📍 Scenario 2: Comparison with Budget 1.5HP Alternatives

Lower-cost pumps often have inferior motor efficiency, typically rated at P1 input powers of 1.8-2.0 kW for equivalent output.

Comparison	Budget 1.5HP Pump	Hayward K-Flo 1.5HP
Input Power	1.85 kW (typical)	1.61 kW
Seasonal Energy Use (1,440 hrs)	2,664 kWh	2,318 kWh
❌ Budget Annual Cost	£702.06
✅ K-Flo Annual Cost		£610.79
💰 Annual Saving		£91.27
📈 10-Year Saving		£912.70

The efficiency advantage compounds over the pump’s lifespan, more than offsetting any initial price difference.

📍 Scenario 3: Right-Sizing from Oversized 3HP Pump

Commercial installations often inherit oversized pumps from original specifications. Replacing with correctly sized equipment delivers substantial savings.

Comparison	Oversized 3HP Pump	Hayward K-Flo 1.5HP
Input Power	2.75 kW	1.61 kW
Commercial Use (4,380 hrs)	12,045 kWh	7,052 kWh
❌ 3HP Annual Cost	£3,173.86
✅ K-Flo Annual Cost		£1,858.20
💵 Annual Saving		£1,315.66
📈 3-Year Saving		£3,946.98

⏱ Payback Period: Under 6 months for commercial operators running pumps year-round.

📥 Downloads & Resources

📄 K-Flo Product Brochure – Complete product specifications, performance curves, and dimensional drawings for the entire K-Flo pump range Download Brochure (PDF)

📄 K-Flo Spare Parts List – Comprehensive parts catalogue with reference numbers for all serviceable components, O-rings, gaskets, impellers, and motor assemblies Download Parts List (PDF)

🛒 Why Buy From Parts4Tubs?

✅ Genuine Hayward Authorised Dealer – All products sourced directly from Hayward distribution, ensuring authentic parts with full manufacturer warranty coverage

✅ Expert Technical Support – Our team understands pool equipment inside and out, providing practical advice on sizing, installation, and troubleshooting

✅ Fast UK Delivery – Stock items dispatched same-day for next working day delivery across mainland UK

✅ Competitive Pricing – We monitor the market to ensure you’re getting excellent value without compromising on genuine quality

✅ Full Spares Availability – Access to the complete range of K-Flo replacement parts, from O-rings and gaskets to impellers and complete motor assemblies

✅ Real People, Real Service – Speak to knowledgeable staff who can help you select the right pump for your specific pool requirements

🏆 Why Choose the Hayward K-Flo 1.5HP?

✅ Proven Performance – The K-Flo series has earned its reputation across thousands of installations in the UK and Europe, delivering consistent, trouble-free operation year after year

✅ Lower Total Cost of Ownership – Superior motor efficiency, durable construction, and excellent parts availability mean lower running costs and repair bills over the pump’s lifetime

✅ Installation Flexibility – With included unions, conversion shims, and Smart Retrofit Kit compatibility, this pump adapts to virtually any existing plumbing configuration

✅ Reduced Maintenance Time – Tool-free access and see-through strainer cover transform routine maintenance from a chore into a 30-second check

✅ Salt Water Ready – Purpose-built for modern salt chlorinated pools without requiring expensive upgrades or modifications

✅ Backed by Hayward’s Global Network – 3-year warranty supported by worldwide service infrastructure and readily available spare parts

✨ Summary

The Hayward K-Flo SPK12615XY1 delivers the perfect combination of performance, efficiency, and user-friendly design for pools up to 131m³. With its 21.9m³/hr flow rate, salt water compatibility, and tool-free maintenance access, this pump addresses the real-world needs of pool owners who want reliable circulation without excessive energy bills or complicated upkeep. The 3-year warranty and comprehensive spare parts availability provide long-term peace of mind, making the K-Flo 1.5HP an investment in years of trouble-free pool enjoyment.