Plastica Argonaut AV75-3DN-S Three Phase Pool Pump (0.5 HP / 0.375 kW)

💧 Professional-grade reliability meets whisper-quiet efficiency for medium-sized pools and commercial applications

📋 Product Overview

The Plastica Argonaut AV75-3DN-S is a premium three-phase swimming pool pump engineered for demanding applications where reliability, efficiency, and quiet operation are essential. Part of ITT HydroAir’s acclaimed Argonaut AV Series, this 0.5 HP (0.375 kW) pump represents the latest generation of pool circulation technology, combining robust construction with energy-efficient performance.

Designed specifically for three-phase electrical systems, this pump delivers consistent, powerful circulation for medium-sized swimming pools, commercial spas, and aquatic facilities. The glass-filled polypropylene construction provides exceptional chemical resistance against chlorine, bromine, and saltwater, while the IPX5-rated motor ensures safe operation in humid environments. With self-priming capability up to 3 meters and maintenance-friendly design, the AV75-3DN-S offers professional performance with minimal downtime.

This pump stands out from competitors through its TÜV certification to European safety standards (EN60335-1 / EN60335-2-41), superior mechanical seal design featuring AISI 316 stainless steel components, and significantly reduced noise output at just 60-62 dB during operation.

Ideal for: Pool installers, commercial facilities, residential customers with three-phase power supply, aquatic centers, hotel pools, and anyone requiring professional-grade pump performance with lower running costs than single-phase alternatives.

⭐ Key Features

✅ Three-Phase Motor Design – Delivers superior efficiency and reliability compared to single-phase pumps, with smoother operation and reduced electrical consumption

✅ 0.5 HP Power Output (0.375 kW P2) – Provides robust circulation for pools up to 80,000 litres with optimal flow rates reaching 136 litres per minute

✅ Self-Priming Up to 3 Meters – Automatically primes when properly filled, eliminating the need for manual intervention and making installation above water level possible

✅ Glass-Filled Polypropylene Construction – Exceptional resistance to pool chemicals including chlorine, bromine, iodine, and saltwater environments ensures decades of corrosion-free service

✅ Premium AISI 316 Stainless Steel Shaft & Seal – Military-grade stainless steel components with carbon/ceramic seal provide superior durability and leak-free performance

✅ IPX5 Rated Motor Protection – Totally enclosed motor design protects against water jets from any direction, ideal for outdoor installations and humid environments

✅ Ultra-Quiet Operation (60-62 dB) – Whisper-quiet performance comparable to normal conversation levels, won’t disturb poolside relaxation or neighboring properties

✅ Large Transparent Strainer Basket – Easy-to-access, generously sized basket with clear lid allows quick visual inspection and effortless debris removal without tools

✅ TÜV Certified Quality – Independently tested and certified to strict European safety standards EN60335-1 and EN60335-2-41 for peace of mind

✅ Standard 2″ BSP Connections (63mm unions) – Universal 2¾” threaded connections compatible with standard pool plumbing systems for straightforward installation

🔧 Technical Specifications

Parameter	Specification
Model Number	AV75-3DN-S
Motor Type	Three Phase
Horsepower (HP)	0.5 HP
Power Output (P2)	0.375 kW
Power Input (P1)	0.60 kW
Voltage / Frequency	400V / 50Hz (Three Phase)
Maximum Flow Rate	136 Litres per Minute (8.16 m³/h)
Maximum Head	13 meters
Self-Priming Height	Up to 3 meters
Pump Body Material	Glass-filled Polypropylene
Shaft Material	AISI 316 Stainless Steel
Mechanical Seal	Carbon/Ceramic
Motor Protection	IPX5 Rated (Water Jet Protected)
Noise Level	Approximately 60-62 dB
Inlet/Outlet Connections	2″ / 63mm unions (BSP 2¾” threads)
Ambient Temperature Range	Maximum 40°C
Certification	TÜV Certified (EN60335-1 / EN60335-2-41)
Strainer Basket	Large capacity with transparent lid
Dimensions (A × B)	164mm × 533mm
Weight	Approximately 12 kg
Electrical Protection Required	3A automatic switch per phase (400V)
Rotation Direction	Counter-clockwise (viewed from pump end)

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💰 Usage Costs & Running Expenses

📊 Annual Running Cost Calculation

Power Consumption Analysis:

• Power Input (P1): 0.60 kW
• UK Energy Rate (2024): £0.24 per kWh (average domestic rate)

🏊 Scenario 1: Residential Pool – Seasonal Use

• Usage: 8 hours/day × 180 days (6 months, May-October)
• Total annual hours: 1,440 hours
• ✅ Annual electricity cost: 0.60 kW × 1,440 hours × £0.24 = £207.36

🏢 Scenario 2: Commercial Pool – Year-Round Operation

• Usage: 10 hours/day × 365 days
• Total annual hours: 3,650 hours
• ✅ Annual electricity cost: 0.60 kW × 3,650 hours × £0.24 = £525.60

☀️ Scenario 3: Holiday Home – Light Use

• Usage: 6 hours/day × 120 days (summer weekends and holidays)
• Total annual hours: 720 hours
• ✅ Annual electricity cost: 0.60 kW × 720 hours × £0.24 = £103.68

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💡 Cost Comparison: Three-Phase vs Single-Phase Advantage

Three-Phase Efficiency Savings:

The AV75-3DN-S three-phase model offers significant efficiency advantages over comparable single-phase pumps:

📍 Comparison: AV75-3DN-S vs AV75-2DN-S (Single Phase)

Three-Phase Model (AV75-3DN-S):

• Power Input: 0.60 kW
• ✅ Annual cost (8hrs/day, 180 days): £207.36

Single-Phase Equivalent (AV75-2DN-S):

• Power Input: 0.60 kW (identical in this case)
• ❌ Annual cost (8hrs/day, 180 days): £207.36

Note: While power consumption is identical for this specific model comparison, three-phase motors typically offer 5-10% efficiency gains in larger models, plus benefits of smoother operation, longer motor life, and reduced maintenance costs.

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📍 Comparison vs Older Technology Pump (0.75 kW single-phase)

Old Single-Phase Pump:

• Power Input: 0.75 kW
• ❌ Annual cost (8hrs/day, 180 days): 0.75 × 1,440 × £0.24 = £259.20

Modern AV75-3DN-S:

• Power Input: 0.60 kW
• ✅ Annual cost (8hrs/day, 180 days): £207.36

💰 Annual Saving: £51.84 💵 5-Year Saving: £259.20 ⏱️ Typical payback period: 2-3 years through energy savings alone

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📍 Comparison vs Competitor Model (Higher Power Consumption)

Many competitor pumps in the 0.5 HP category have higher power input ratings:

Typical Competitor Pump:

• Power Input: 0.70 kW
• ❌ Annual cost (8hrs/day, 180 days): 0.70 × 1,440 × £0.24 = £242.08

Argonaut AV75-3DN-S:

• Power Input: 0.60 kW
• ✅ Annual cost (8hrs/day, 180 days): £207.36

💰 Annual Saving: £34.72 💵 3-Year Saving: £104.16

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📈 Long-Term Cost Benefits

⚡ Three-Phase Motor Advantages:

✅ Reduced Energy Consumption – Three-phase motors are inherently more efficient, converting more electrical input into mechanical output

✅ Lower Maintenance Costs – Smoother operation means less wear on bearings and mechanical components, extending service intervals

✅ Extended Motor Lifespan – Balanced three-phase power reduces thermal stress on motor windings, typically adding 2-3 years to operational life

✅ Higher Power Factor – Better power factor means reduced reactive power charges on commercial electricity tariffs (typically 3-5% additional saving)

✅ Reduced Starting Current – Gentler motor starting reduces stress on electrical systems and minimizes potential damage from power surges

💷 Total Cost of Ownership over 10 Years:

• Energy costs (residential use): £2,074
• Estimated maintenance: £150
• Total: £2,224

Compare this to a less efficient competitor at 0.70 kW: £2,421 energy + £200 maintenance = £2,621

💸 10-Year Savings: £397

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🎯 Real World Applications & Examples

🏊‍♂️ Residential Swimming Pools

Ideal for medium-sized domestic pools (40,000-80,000 litres). The AV75-3DN-S provides excellent circulation for effective filtration and chemical distribution. Three-phase power is common in rural properties, new-build homes with EV chargers, and properties with workshop equipment. The quiet operation won’t disturb garden entertaining or nearby bedrooms, while the self-priming design simplifies installation above ground level.

Typical Performance: Achieves complete pool turnover in 6-8 hours for a 60,000-litre pool, meeting recommended circulation standards with energy-efficient operation.

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🛁 Commercial Spas & Hot Tubs

Perfect for gym facilities, hotel spas, and leisure centers requiring reliable year-round operation. The corrosion-resistant construction handles high chlorine levels and elevated temperatures, while the IPX5 motor protection ensures safety in humid spa environments. The transparent strainer basket allows quick maintenance checks without disrupting service.

Maintenance Advantage: Large strainer basket reduces cleaning frequency in high-bather-load environments, minimizing operational interruptions.

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🏢 Light Commercial Installations

Excellent choice for small hotel pools, holiday park facilities, and B&B pools where three-phase power is available. TÜV certification meets insurance requirements for commercial applications. The robust construction withstands continuous operation while maintaining efficiency, and the professional-grade components ensure minimal downtime.

Cost Efficiency: Lower running costs compared to oversized single-phase pumps commonly found in commercial settings, with typical annual savings of £100-150.

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🌊 Water Features & Ornamental Ponds

Suitable for large decorative water features, koi ponds, and commercial fountains requiring continuous circulation. The self-priming capability handles installations with elevated pump locations, while the chemical-resistant materials tolerate various water treatment systems. Ultra-quiet operation (60-62 dB) preserves the tranquil ambiance of garden settings.

Installation Flexibility: 3-meter self-priming height allows pump placement in equipment rooms or hidden locations away from water features.

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🔄 Upgrade & Replacement Projects

An excellent replacement for aging single-phase pumps where three-phase power has been added (e.g., during solar panel installation or home renovation). When upgrading from older, less efficient pumps, the AV75-3DN-S delivers immediate energy savings while providing modern features like transparent strainer covers and improved flow characteristics.

Retrofit Advantage: Standard 2″ connections fit existing pipework, minimizing installation complexity and plumbing modifications.

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💡 Cost Savings Examples

📍 Scenario: Upgrading from 15-Year-Old Pool Pump

Old Pump Characteristics:

• Technology: 15-year-old single-phase pump
• Power Input: 0.85 kW (typical for older models)
• Estimated annual usage: 8 hours/day × 180 days = 1,440 hours

❌ Old Pump Annual Cost:

• 0.85 kW × 1,440 hours × £0.24/kWh = £293.76

✅ New Argonaut AV75-3DN-S Annual Cost:

• 0.60 kW × 1,440 hours × £0.24/kWh = £207.36

💰 Annual Saving: £86.40 💵 5-Year Saving: £432.00 ⏱️ Payback Period: Approximately 3 years (based on typical purchase price of £300-400 plus installation)

Additional Benefits:

• ✅ Quieter operation (older pumps typically 70-75 dB vs 60-62 dB)
• ✅ Improved reliability (reduced breakdown risk)
• ✅ Modern safety features (IPX5 motor protection)
• ✅ Easier maintenance (transparent strainer basket)

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📍 Scenario: Commercial Pool – Single-Phase to Three-Phase Conversion

A small hotel with a 75,000-litre pool operates an oversized 1.1 kW single-phase pump for 10 hours daily, year-round.

❌ Current Single-Phase Pump (1.1 kW):

• Usage: 10 hours/day × 365 days = 3,650 hours/year
• Annual cost: 1.1 kW × 3,650 × £0.24 = £959.40
• Commercial rate (£0.20/kWh): £803.00

✅ Argonaut AV75-3DN-S (0.60 kW):

• Usage: 10 hours/day × 365 days = 3,650 hours/year
• Annual cost: 0.60 kW × 3,650 × £0.24 = £525.60
• Commercial rate (£0.20/kWh): £438.00

💰 Annual Saving (commercial rate): £365.00 💵 3-Year Saving: £1,095.00 📈 5-Year Saving: £1,825.00

Return on Investment:

• Cost of pump + three-phase installation: ~£1,200-1,500
• ⏱️ Payback period: 3.5-4 years
• 💷 Net 10-year benefit: £2,450-2,750

Note: This scenario assumes three-phase power is already available or installed as part of broader electrical upgrade. If three-phase installation is required solely for pump upgrade, payback period extends significantly.

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📍 Scenario: Energy Price Increase Protection

With energy prices rising 65% from pre-2020 levels (from £0.14/kWh to £0.24/kWh), efficient equipment offers increasing savings:

At 2019 Energy Prices (£0.14/kWh):

• ❌ 0.75 kW pump annual cost: £151.20
• ✅ AV75-3DN-S annual cost: £120.96
• Annual saving: £30.24

At 2024 Energy Prices (£0.24/kWh):

• ❌ 0.75 kW pump annual cost: £259.20
• ✅ AV75-3DN-S annual cost: £207.36
• Annual saving: £51.84

💸 Saving Increase: 71% higher savings in current energy market

Future Protection: If energy prices rise to £0.30/kWh (as predicted by some analysts for 2025-2026):

• Annual saving would increase to £64.80
• 📊 Making efficiency upgrades even more financially attractive

📍 Scenario: Correct Sizing Prevents Over-Specification

Many pools are fitted with oversized pumps, wasting energy. A correctly sized AV75-3DN-S replacing an unnecessarily powerful 1.5 HP pump:

❌ Oversized 1.5 HP Pump (1.3 kW):

• Annual cost (8hrs/day, 180 days): 1.3 × 1,440 × £0.24 = £449.28
• Excessive flow causes filtration problems
• Higher wear on pool equipment

✅ Correctly Sized AV75-3DN-S (0.60 kW):

• Annual cost (8hrs/day, 180 days): £207.36
• Optimal flow for filtration efficiency
• Extended filter media lifespan

💰 Annual Saving: £241.92 💵 5-Year Saving: £1,209.60

Additional Benefits:

• ✅ Better filtration efficiency (correct flow rate)
• ✅ Reduced filter maintenance (fewer backwashes needed)
• ✅ Extended filter media life (typically 1-2 years longer)
• ✅ Quieter operation

📥 Downloads & Resources

📄 Argonaut Pump Installation & Owner’s Manual – Complete installation instructions, maintenance procedures, troubleshooting guide, and multilingual safety information (PDF, 2.1MB)

📄 Argonaut AV Series Technical Datasheet – Full model range specifications, performance curves, dimensions, spare parts reference, and technical drawings (PDF, 1.8MB)

🏆 Why Choose the Argonaut AV75-3DN-S

✅ Superior Energy Efficiency – Three-phase motor technology delivers the same performance as competing pumps while consuming 15-20% less electricity, reducing both running costs and environmental impact

✅ Professional-Grade Construction – Glass-filled polypropylene body and AISI 316 stainless steel internals provide commercial-quality durability that outlasts budget alternatives by years

✅ European Safety Certification – TÜV tested and certified to EN60335 standards ensures compliance with insurance requirements and provides peace of mind for commercial installations

✅ Exceptionally Quiet Operation – At just 60-62 dB, this pump operates at conversation level, making it ideal for residential areas, hotels, and any setting where noise pollution is a concern

✅ Self-Priming Convenience – Eliminates the need for foot valves or manual priming when properly installed, with 3-meter self-priming capability offering installation flexibility above water level

✅ Maintenance-Friendly Design – Large transparent strainer basket with tool-free access allows quick inspection and cleaning, minimizing service time and operational downtime

✅ Proven Reliability – Part of ITT HydroAir’s established Argonaut range with decades of proven performance in swimming pool applications worldwide

✅ Universal Compatibility – Standard 2″ BSP threaded connections (2¾” unions with 63mm diameter) fit existing plumbing systems without adapters or modifications

✅ Chemical Resistance – Suitable for chlorine, bromine, iodine, and saltwater applications, with materials selected specifically for long-term exposure to aggressive pool chemicals

✅ Comprehensive Protection – IPX5-rated motor withstands direct water jets and humid environments, while thermal overload protection prevents damage from overheating or electrical faults

✨ Summary

The Plastica Argonaut AV75-3DN-S represents a premium three-phase solution for pool professionals and discerning residential customers who demand reliability, efficiency, and quiet operation. With robust construction featuring glass-filled polypropylene and AISI 316 stainless steel components, this 0.5 HP pump delivers powerful 136 LPM circulation while consuming just 0.60 kW of power.

TÜV-certified to European safety standards and protected to IPX5 rating, the AV75-3DN-S excels in both residential and light commercial applications. Its self-priming capability up to 3 meters, combined with maintenance-friendly transparent strainer basket, ensures trouble-free operation with minimal downtime. At a whisper-quiet 60-62 dB, this pump provides professional performance without compromising poolside tranquility.

Whether upgrading aging equipment, installing a new pool system, or seeking energy cost reduction, the Argonaut AV75-3DN-S delivers exceptional value through proven reliability, low running costs, and decades of maintenance-free service.