💧 Waterco Hydrostar 4.00hp 3 Phase Pump Mk3

🏊 Purpose-Built Commercial Power for High-Volume Swimming Pools & Aquatic Facilities

📋 Product Overview

The Waterco Hydrostar 4.00hp 3 Phase Pump Mk3 represents the pinnacle of commercial pool pump engineering, delivering exceptional flow rates and hydraulic efficiency for demanding aquatic environments. This powerhouse circulation pump has been completely redesigned from previous Hydrostar models to provide substantially quieter operation, higher flow rates, and superior head pressure.

Engineered specifically for commercial-sized swimming pools, leisure centres, hotels, and public aquatic facilities, the Hydrostar Mk3 features an innovative internal volute design that creates naturally balanced water flow while dramatically reducing hydraulic turbulence. The result? Smoother, more efficient operation with reduced energy consumption and significantly lower noise levels compared to competing pumps in this class.

Built to withstand the demands of continuous commercial operation, this pump features a robust single-piece glass-filled thermoplastic body, high-grade 316 stainless steel mechanical seal for superior corrosion resistance, and IP55-rated motor protection. Whether you’re running a municipal swimming pool, hotel resort, health club, or commercial spa facility, the Hydrostar 4.00hp delivers the reliable, high-volume circulation your operation demands.

⭐ Key Features

✅ Powerful 4.00hp Three-Phase Motor — Delivers 2.92kW of efficient pumping power with 2900 RPM operation for maximum water turnover in commercial pools

✅ Exceptional Flow Rate Performance — Achieves 47.00 m³/hr at 10 metres head, ensuring rapid and complete pool water circulation for large commercial installations

✅ Revolutionary Internal Volute Design — Newly redesigned hydraulic system provides naturally balanced water flow, reduces turbulence, and operates substantially quieter than previous models

✅ Heavy-Duty 6L Hair & Lint Pot — Extra-large strainer basket with clear lid for easy visual inspection, minimising maintenance downtime and ensuring uninterrupted filtration

✅ Quarter-Turn Lid & Lock Ring Assembly — Innovative easy-grip handles allow rapid maintenance access without tools, reducing service time significantly

✅ Premium 316 Stainless Steel Mechanical Seal — High-grade carbon/graphite seal with stainless steel spring assembly provides exceptional protection against chlorinated water, saltwater, ozone, bromine, and Baquacil

✅ IP55 Weather-Protected Motor — Fan-cooled motor with 431-grade stainless steel shaft and thermal overload protection for reliable outdoor or plant room installation

✅ 90mm (3″) Half Union Connections — Quick-connect barrel unions for seamless UPVC pipe integration, simplifying installation and future maintenance

✅ UV Stabilised & Corrosion Resistant Construction — Glass-filled Noryl impeller/diffuser and thermoplastic pump body withstand harsh pool chemical environments and UV exposure

✅ Self-Priming Capability — Eliminates the need for manual priming, ensuring reliable start-up every time and protecting against dry-running damage

🔧 Technical Specifications

Specification	Details
Model	Hydrostar 400 Mk3
Product Code	14 97 241 040
Motor Power	4.00 HP (2.92 kW)
Phase	Three Phase
Voltage	380–420V
Frequency	50Hz
Current Draw	5.2 Amps
Motor Speed	2900 RPM
Flow Rate @ 10m Head	47.00 m³/hr
Strainer Capacity	6 Litres
Connections	90mm (3″) Half Unions
Motor Protection	IP55 Rated
Shaft Material	431 Grade Stainless Steel
Mechanical Seal	316 Stainless Steel with Carbon/Graphite
Pump Body Material	UV Stabilised Glass-Filled Thermoplastic
Impeller/Diffuser	Glass-Filled Noryl
Total Length	834mm
Overall Dimensions (L × W × H)	940mm × 500mm × 330mm
Weight	39.5 kg
Warranty	1 Year (Commercial Installations)

💰 Usage Costs & Running Expenses

Understanding your operational costs is essential for commercial pool management. Here’s a comprehensive breakdown of the Hydrostar 4.00hp running costs based on current UK energy prices.

📊 Annual Running Cost Calculation

Key Parameters:

• Motor Power: 2.92 kW
• UK Commercial Electricity Rate: £0.27 per kWh (November 2025 average)

🏢 Scenario 1: Municipal Pool / Leisure Centre (24-Hour Operation)

Commercial swimming pools and public facilities typically require continuous pump operation to meet health and safety turnover requirements.

Parameter	Calculation
Daily Running Hours	24 hours
Days Per Year	365 days
Annual Running Hours	8,760 hours
Power Consumption	2.92 kW × 8,760 hrs = 25,579 kWh
✅ Annual Running Cost	25,579 kWh × £0.27 = £6,906.33

🏨 Scenario 2: Hotel/Resort Pool (16-Hour Operation)

Hotel and resort pools typically operate during extended guest hours with overnight shutdown periods.

Parameter	Calculation
Daily Running Hours	16 hours
Days Per Year	365 days
Annual Running Hours	5,840 hours
Power Consumption	2.92 kW × 5,840 hrs = 17,053 kWh
✅ Annual Running Cost	17,053 kWh × £0.27 = £4,604.31

☀️ Scenario 3: Seasonal Commercial Pool (8 Months Operation)

Outdoor commercial pools, holiday parks, and seasonal facilities operating April to November.

Parameter	Calculation
Daily Running Hours	12 hours
Operating Season	243 days (8 months)
Annual Running Hours	2,916 hours
Power Consumption	2.92 kW × 2,916 hrs = 8,515 kWh
✅ Annual Running Cost	8,515 kWh × £0.27 = £2,299.05

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💡 Energy Efficiency Advantage: Three-Phase vs Single-Phase

The Hydrostar 4.00hp utilises three-phase motor technology, which offers significant efficiency advantages over equivalent single-phase pumps:

Comparison	Single-Phase Equivalent	Hydrostar 3-Phase
Typical Efficiency Loss	15-20% higher consumption	✅ Baseline
Estimated Power Draw	~3.36 kW	✅ 2.92 kW
Annual Cost (24hr operation)	£7,943.28	✅ £6,906.33
Annual Savings	❌ —	💷 £1,036.95

⚡ Three-phase motors deliver 10-15% greater efficiency, translating to substantial long-term savings for commercial operations.

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🎯 Real World Examples & Applications

🏊‍♂️ Municipal Swimming Pools & Leisure Centres

The Hydrostar 4.00hp is ideally suited for public swimming pools with volumes between 150,000 and 350,000 litres. With a flow rate of 47 m³/hr, it can achieve:

• 150,000L Pool: Complete turnover in 3.2 hours (7+ turnovers per 24 hours)
• 250,000L Pool: Complete turnover in 5.3 hours (4+ turnovers per 24 hours)
• 350,000L Pool: Complete turnover in 7.4 hours (3+ turnovers per 24 hours)

This exceeds UK and European health regulations requiring minimum 3-4 turnovers daily for public pools.

🏨 Hotels, Resorts & Health Clubs

Perfect for hotel main pools, resort facilities, and health club installations where reliable, quiet operation is essential. The redesigned internal volute significantly reduces operational noise — a crucial consideration for guest-facing environments.

🌊 Water Parks & Attraction Pools

The robust construction and high flow capability make the Hydrostar 4.00hp an excellent choice for lazy rivers, wave pool feed systems, and attraction pool circulation where continuous heavy-duty operation is required.

🔄 Upgrade & Replacement Applications

Ideal replacement for aging single-speed commercial pumps. The 90mm union connections provide compatibility with standard commercial pipework, while the improved hydraulic efficiency delivers immediate energy savings from day one.

🏢 Commercial Spa & Wellness Facilities

Where multiple large spa pools or hydrotherapy installations require high-volume circulation, the Hydrostar 4.00hp provides the flow capacity and reliability essential for commercial wellness operations.

💡 Cost Savings Examples

📍 Scenario: Upgrading from an Older 4HP Single-Phase Pump

Many commercial facilities are still operating legacy single-phase pumps with outdated motor technology.

Factor	Old Single-Phase Pump	Hydrostar 4.00hp 3-Phase
Estimated Power Draw	3.36 kW	✅ 2.92 kW
Annual Hours (24hr operation)	8,760 hrs	8,760 hrs
Annual Consumption	29,434 kWh	✅ 25,579 kWh
Annual Cost @ £0.27/kWh	❌ £7,947.18	✅ £6,906.33
Annual Saving	—	💰 £1,040.85

📈 5-Year Projected Savings: £5,204.25

⏱️ Payback Period on Upgrade: The energy savings alone can offset the pump investment within approximately 12-18 months for continuously operating facilities.

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📍 Scenario: Replacing an Oversized 5.5HP Pump

Many installations run oversized pumps, wasting energy without performance benefit.

Factor	Oversized 5.5HP Pump	Right-Sized Hydrostar 4.00hp
Typical Power Draw	4.0 kW	✅ 2.92 kW
Annual Hours (16hr hotel operation)	5,840 hrs	5,840 hrs
Annual Consumption	23,360 kWh	✅ 17,053 kWh
Annual Cost @ £0.27/kWh	❌ £6,307.20	✅ £4,604.31
Annual Saving	—	💷 £1,702.89

📈 10-Year Projected Savings: £17,028.90

📍 Scenario: Comparison vs Competitor Commercial Pump

Comparing against a typical competitor pump with similar specifications but lower hydraulic efficiency.

Factor	Competitor 4HP Pump	Waterco Hydrostar 4.00hp
Rated Power	3.1 kW	✅ 2.92 kW
Flow Rate @ 10m	42 m³/hr	✅ 47 m³/hr
Efficiency Rating	Standard	✅ Enhanced Volute Design
Annual Cost (24hr @ £0.27)	❌ £7,327.62	✅ £6,906.33
Annual Saving	—	💵 £421.29
Better Flow Performance	—	✅ +12% Flow Rate

The Hydrostar delivers 12% greater flow while consuming 6% less energy — a compelling efficiency advantage.

📥 Downloads & Resources

📄 Waterco Pumps Brochure — Complete Hydrostar Mk3 series specifications, flow curves, and dimensional drawings

🏆 Why Choose the Waterco Hydrostar 4.00hp?

✅ Proven Commercial Reliability — Waterco’s reputation for building robust, long-lasting commercial pool equipment is backed by decades of industry experience

✅ Quieter Operation — The completely redesigned Mk3 internal volute delivers substantially quieter running than previous models and many competitors

✅ Superior Corrosion Resistance — 316 stainless steel mechanical seal handles chlorinated water, saltwater, ozone, and alternative sanitisers without degradation

✅ Reduced Maintenance Downtime — Quarter-turn lid with easy-grip handles and clear inspection window means faster strainer basket cleaning with less plant room time

✅ Three-Phase Efficiency — Inherently more efficient motor technology delivers measurable energy savings over single-phase alternatives

✅ Optimised Flow Performance — 47 m³/hr at 10m head provides excellent turnover rates for commercial pool volumes while maintaining efficient operation

✅ Comprehensive Warranty — 1-year warranty for commercial installations provides peace of mind for your facility investment

🛒 Why Buy From Parts4Tubs?

✅ Competitive Pricing — Trade-level prices on genuine Waterco commercial equipment without compromising on quality or service

✅ UK Stock Availability — Items held in UK stock for rapid despatch, minimising downtime for your commercial operation

✅ Expert Technical Support — Knowledgeable team available to assist with product selection, specifications, and application advice

✅ Trusted Supplier — Established reputation serving commercial pool operators, contractors, and facilities managers across the UK

✅ Fast, Secure Delivery — Reliable nationwide delivery with full tracking and secure packaging for heavy commercial equipment

✅ Trade Account Options — Flexible account facilities available for commercial customers with regular purchasing requirements

✨ Summary

The Waterco Hydrostar 4.00hp 3 Phase Pump Mk3 stands as the smart choice for commercial pool operators seeking powerful, efficient, and reliable water circulation. With its enhanced hydraulic design, premium construction materials, and three-phase motor efficiency, this pump delivers exceptional flow performance while keeping operational costs firmly under control.

Whether you’re specifying for a new commercial pool build, upgrading aging plant room equipment, or simply demanding the best for your facility, the Hydrostar 4.00hp combines proven Waterco quality with meaningful energy savings — delivering both performance and value for years of dependable service.

Invest in commercial-grade reliability. Invest in the Waterco Hydrostar Mk3.