🌊 Calplas DPS-2040 AFM Vertical Multilayer Filter – Commercial Pool Filtration Up to 760,000 Litres

Flagship filtration performance for Olympic-size pools and major aquatic facilities

💧 Product Overview

The Calplas DPS-2040 is the flagship model in the DPS range, an industrial-grade vertical multilayer filter engineered for the most demanding aquatic facilities including Olympic-size pools, major leisure complexes and high-capacity public swimming venues. Built from hand-laminated glass-fibre reinforced polyester (GRP), this impressive 2,040mm diameter filter delivers exceptional flow rates of 95.1 m³/h through its deep 1,200mm filter bed optimised for AFM (Activated Filter Media).

Manufactured to EN 13121-3 European standards by Calplas, a world-leading filter producer since 1970, the DPS-2040 features an expansive 3.17 m² filter area and 212 precision nozzles for superior water distribution. Premium commercial features include a 420mm steel service manhole, upgraded 6-inch sight glass for optimal backwash monitoring, and larger DN150 connections to accommodate the substantial flow requirements.

With a powerful backwash capacity of 158.5 m³/h and proven GRP construction backed by a 5-year tank warranty, the DPS-2040 represents the ultimate choice for facility managers requiring maximum filtration capacity for pools up to 760,000 litres.

⭐ Key Features

✅ Maximum 3.17 m² Filter Area – The largest filtration surface in the DPS range for ultimate commercial capacity

✅ 95.1 m³/h Flow Rate – Flagship throughput suitable for pools up to 760,000 litres with standard 8-hour turnover

✅ 158.5 m³/h Backwash Capacity – Maximum reverse flow ensures thorough media cleaning across the large filter bed

✅ 1,200mm Deep Filter Bed – Extended media depth provides superior contact time for exceptional particle capture

✅ 212 Precision Nozzles – Maximum nozzle count ensures uniform water distribution across the expansive filter area

✅ Industrial GRP Construction – Hand-laminated glass-fibre reinforced polyester with UV-resistant gelcoat finish

✅ 6-inch Sight Glass – Largest viewing port in the range for optimal backwash monitoring

✅ DN150 Collar Socket Connections – Heavy-duty flanged connections for maximum flow plumbing systems

✅ 420mm Steel Service Manhole – Convenient access for media inspection, maintenance and replacement

✅ 2.5 Bar Working Pressure – Factory tested to 3.75 bar for confident commercial operation

✅ Steel-Reinforced Side Walls – Internal reinforcement at high-stress points ensures structural longevity

✅ 5-Year Tank Warranty – Manufacturer-backed warranty demonstrates build quality confidence

🔧 Technical Specifications

Specification	Value
Filter Type	Vertical Multilayer AFM Filter
Tank Diameter	2,040 mm
Overall Height	2,660 mm
Filter Area	3.17 m²
Flow Rate (30 m³/h/m²)	95.1 m³/h
Backwash Capacity (50 m³/h/m²)	158.5 m³/h
Filter Bed Height	1,200 mm
Working Pressure	2.5 bar (maximum)
Test Pressure	3.75 bar
Maximum Temperature	40°C
Inlet/Outlet Connection	DN150 collar socket
Service Manhole	Ø 420 mm (steel)
Sight Glass	6 inch
Number of Nozzles	212
Distance from Ground	820 mm
Distance Between Connections	1,245 mm
Free Space Under Filter	100 mm
Weight (Empty)	880 kg
Media Capacity (Sand)	Approximately 5,700 kg
Media Capacity (AFM)	Approximately 5,100 kg
Tank Material	GRP (Glass-Fibre Reinforced Polyester)
Tank Colour	Blue RAL 5015
Certification	EN 13121-3
Warranty	5 years (tank)

📐 Pool Sizing Guide

The Calplas DPS-2040 is designed for very large commercial pool applications requiring maximum filtration capacity.

Sizing Principle: The filter flow rate should achieve complete pool water turnover within 6-8 hours for optimal water quality. Public and commercial pools typically require faster turnover times than private installations.

Formula:

Required Flow Rate (m³/h) = Pool Volume (m³) ÷ Turnover Time (hours)

Pool Size Compatibility:

Pool Application	Volume Range	Turnover	Suitability
🏢 Very large commercial pool	Up to 380,000 L	4 hours	✅ Excellent – generous capacity
🏢 Major facility pool	380,000 – 570,000 L	6 hours	✅ Optimal performance
🏊 Olympic-size pools	570,000 – 760,000 L	8 hours	✅ Suitable
🏨 Large resort complexes	Up to 650,000 L	6-8 hours	✅ Ideal application
🏫 Major university aquatic centres	Up to 700,000 L	6-8 hours	✅ Reliable choice
🏋️ Regional leisure centres	Up to 760,000 L	8 hours	✅ Maximum capacity

This Filter:

📍 Flow Rate: 95.1 m³/h at 30 m³/h/m² filtration velocity

📍 Backwash Flow Rate: 158.5 m³/h at 50 m³/h/m²

📍 Recommended Pool Size: Up to 760,000 litres (8-hour turnover) or 570,000 litres (6-hour optimal turnover)

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⚙️ Installation Requirements

Plumbing Connections:

Requirement	Specification
Inlet Connection	DN150 collar socket
Outlet Connection	DN150 collar socket
Connection Distance	1,245 mm between ports
Valve Position	Top-mounted (supplied separately)
Venting	1″ F connection provided

Physical Installation:

Requirement	Details
Base	Heavy-duty reinforced concrete pad required
Height Clearance	Minimum 700 mm above filter for valve operation and media loading
Service Access	1,000 mm around filter for maintenance
Ground Clearance	820 mm from base to lowest point
Free Space Below	100 mm minimum required
Lifting	Integrated lifting eye for crane placement

Pump Compatibility:

⚠️ The filter must be correctly matched with an appropriate pump system. The pump flow rate should not exceed the filter’s maximum capacity.

• Recommended Pump Flow Rate: 85 – 95 m³/h for normal filtration
• Maximum Flow Rate: Do not exceed 95.1 m³/h during filtration mode
• Backwash Pump Requirement: Capable of delivering up to 158.5 m³/h for effective media cleaning

💡 Professional Installation Note: Due to the substantial filter weight (880 kg empty, over 5,000 kg when filled with media) and commercial application, professional installation by qualified pool engineers with heavy-duty lifting equipment is essential. Site access and structural considerations must be evaluated prior to installation.

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🔄 Maintenance Guide

Routine Maintenance Schedule:

Task	Frequency	Procedure
Check pressure gauge	Daily	Record baseline and monitor increases
Inspect sight glass	Weekly	Check for clarity and media condition
Backwash cycle	When pressure rises 0.5-0.7 bar	Run until sight glass shows clear water
Rinse after backwash	After each backwash	Run 60-90 seconds to settle media
Inspect manhole seals	Monthly	Check for wear or leakage
Check nozzle condition	Annually	Inspect via manhole for damage
Full media inspection	Annually	Assess media condition and level
Media replacement	Every 10-15 years (AFM)	Complete media change when performance declines

Pressure Gauge Guide:

📊 Clean filter baseline: Establish reading after fresh media installation or thorough backwash

📊 Backwash trigger: When pressure rises 0.5-0.7 bar above baseline

📊 Maximum operating pressure: 2.5 bar

⚠️ Warning: Never operate above 2.5 bar working pressure. If pressure cannot be reduced by backwashing, investigate for blockages or media channelling.

Winterisation (UK Climate):

For seasonal outdoor commercial pools, proper winterisation is essential:

1. Drain filter tank completely via the drain outlet
2. Remove and store the drain plug safely
3. Ensure all water is expelled from pipework and connections
4. Cover filter or relocate to frost-free storage if possible
5. Inspect seals and gaskets before recommissioning

⚠️ Critical: Never leave water in the filter during freezing conditions – ice expansion can cause irreparable tank damage and void warranty.

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🪨 Filter Media Information

The Calplas DPS-2040 is specifically designed for AFM (Activated Filter Media) but is compatible with various filter media types.

Media Capacity:

Media Type	Approximate Capacity
Sand	5,700 kg
AFM	5,100 kg

Compatible Media:

Media Type	Filtration Rating	Lifespan	Key Benefits
AFM Standard	4-5 microns	10-15 years	Bio-resistant, self-sterilising, superior clarity
AFM ng	1 micron	10-15 years	Finest filtration, removes oils and microplastics
Filter Sand	20-40 microns	5-7 years	Economical initial cost
Glass Media	10-15 microns	8-10 years	Better than sand, recyclable

AFM Media Loading:

The 1,200mm filter bed height is optimised for multilayer AFM installation. Consult manufacturer filling plans for correct grade distribution:

• Grade 3 (2.0-4.0mm): Support layer covering nozzles
• Grade 2 (0.7-2.0mm): Intermediate support and filtration
• Grade 1 (0.4-1.0mm): Primary filtration layer (top)

💡 Tip: AFM requires approximately 10-15% less media by weight compared to sand. The DPS-2040 requires substantial media quantities – contact Parts4Tubs for specific filling plans and AFM ordering.

Signs Media Needs Attention:

• Persistent cloudiness despite correct water chemistry
• Shortened filter cycles between backwashes
• Pressure rises quickly after backwash
• Visible channelling or uneven media bed
• Media particles returning to pool

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💎 Filtration Performance

Metric	Value
Filter Area	3.17 m²
Filter Bed Depth	1,200 mm
Number of Nozzles	212
Filtration Velocity	30 m³/h/m² (normal operation)
Backwash Velocity	50 m³/h/m²

Filtration Rating by Media Type:

Media	Particle Size Removal	Efficiency
AFM ng	Down to 1 micron	95% removal
AFM Standard	Down to 4 microns	95% removal
Quality Sand	Down to 20-40 microns	70-80% removal

What Different Micron Ratings Capture:

Rating	Particles Removed
40+ microns	Visible debris, leaves, large particles
20-40 microns	Sand, dirt, visible suspended particles
4-10 microns	Fine particles, most algae, pollen
1-4 microns	Very fine particles, bacteria, cryptosporidium

The deep 1,200mm filter bed combined with AFM media and 212 precision nozzles delivers commercial-grade water clarity significantly exceeding typical sand filtration performance – ideal for high-profile aquatic venues.

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🛠️ Valve Positions & Functions

The Calplas DPS-2040 requires a separate multiport or butterfly valve system (not included). Common valve positions and their functions:

Position	Function
Filter	Normal filtration mode – water passes through media to pool
Backwash	Reversed flow cleans media – water to waste
Rinse	Settles media after backwash – short cycle to waste
Waste	Bypasses filter, sends water directly to drain
Recirculate	Bypasses filter media, returns to pool (chemical distribution)
Closed	Stops all water flow through filter

⚠️ Note: Valve system must be sized for DN150 connections and capable of handling the filter’s substantial flow rates including 158.5 m³/h backwash capacity. Commercial butterfly valve systems recommended – consult Parts4Tubs for compatible options.

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🎯 Ideal Applications

Application	Pool Size	Suitability
🏊 Olympic-size swimming pools	Up to 760,000 L	✅ Primary design application
🏢 Major public swimming centres	Up to 700,000 L	✅ Flagship performance
🏨 Large resort pool complexes	Up to 650,000 L	✅ Excellent for hospitality
🏫 University aquatic centres	Up to 700,000 L	✅ Reliable institutional use
🏋️ Regional leisure centres	Up to 760,000 L	✅ Maximum capacity
🏊 Competition venues	Up to 700,000 L	✅ Professional-grade filtration

Not Recommended For:

• Pools under 300,000 litres (significantly over-specified – consider smaller DPS models)
• Facilities without adequate structural support for 5+ tonne filled weight
• Sites without crane access for installation

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❓ Frequently Asked Questions

Q: What size pool will this filter handle?

A: The DPS-2040 is suitable for Olympic-size and very large commercial pools up to 760,000 litres with an 8-hour turnover, or up to 570,000 litres with the optimal 6-hour turnover. The 95.1 m³/h flow rate at 30 m³/h/m² provides maximum commercial filtration capacity.

Q: How does this compare to other DPS models?

A: The DPS-2040 is the flagship model offering 26% more filter area than the DPS-1840 (3.17 m² vs 2.52 m²), 26% higher flow rate (95.1 m³/h vs 75.6 m³/h), and upgraded DN150 connections versus DN125 on smaller models. It features 212 nozzles and a larger 6-inch sight glass for optimal monitoring.

Q: How much filter media does this filter require?

A: The DPS-2040 requires approximately 5,700 kg of sand or 5,100 kg of AFM media. This is a substantial quantity – contact Parts4Tubs for AFM ordering and delivery logistics.

Q: How often do I need to backwash?

A: Backwash when the pressure gauge reads 0.5-0.7 bar above your clean baseline reading. In high-capacity commercial pools, this typically occurs every few days depending on bather load and environmental factors.

Q: What pump do I need?

A: Match with a commercial pump capable of delivering 85-95 m³/h for filtration mode. Backwash requires up to 158.5 m³/h for effective media cleaning. Never exceed the filter’s maximum flow rates. Multiple pump systems may be required.

Q: Is the valve included?

A: No, the valve system is supplied separately. The filter requires a compatible multiport or butterfly valve system sized for DN150 connections and capable of handling 158.5 m³/h backwash flow.

Q: What are the installation requirements?

A: The DPS-2040 weighs 880 kg empty and over 5,000 kg when filled with media. A reinforced concrete pad, crane access for installation, and adequate structural support are essential. Professional installation by qualified engineers is required.

Q: What warranty is included?

A: The Calplas DPS-2040 includes a 5-year manufacturer warranty on the GRP tank. Contact Parts4Tubs for full warranty terms and conditions.

Q: Can this filter be used for hot water applications?

A: The filter is rated for water temperatures up to 40°C. For higher temperature applications or ozone resistance, Calplas offers upgraded specifications on request.

Q: Is a high-pressure version available?

A: Yes, Calplas can supply the DPS-2040 with working pressure up to 6 bar on request. Contact Parts4Tubs for custom specifications.

📥 Downloads & Resources

📄 Product Datasheet (PDF) – Complete specifications and dimensional drawings

🏆 Why Choose the Calplas DPS-2040

✅ Maximum Capacity – 3.17 m² filter area and 95.1 m³/h flow rate handles pools up to 760,000 litres

✅ Flagship Performance – Powerful 158.5 m³/h backwash capacity ensures thorough media cleaning

✅ 212 Precision Nozzles – Maximum nozzle count for superior water distribution

✅ Commercial-Grade Construction – Hand-laminated GRP with steel reinforcement for decades of reliable service

✅ Superior Filtration Depth – 1,200mm filter bed height provides extended contact time

✅ Proven Manufacturer – Calplas has been producing world-class filtration equipment since 1970

✅ Enhanced Monitoring – Largest 6-inch sight glass for optimal backwash visibility

✅ Heavy-Duty Connections – DN150 ports accommodate maximum flow requirements

✅ European Quality Standards – EN 13121-3 certified construction with 5-year tank warranty

🤝 Why Buy From Parts4Tubs

✅ UK-Based Company – Local support from pool equipment specialists who understand UK requirements

✅ Expert Technical Advice – Our team can help with sizing, pump matching, and system design

✅ Competitive Commercial Pricing – Trade and quantity discounts available for installers and facility managers

✅ Project Support – Technical consultation for major aquatic facility installations

✅ Fast UK Delivery – Efficient logistics for time-sensitive projects

✅ Full Warranty Support – We handle warranty claims directly with manufacturers

✅ Complete System Solutions – Pumps, valves, AFM media and spare parts all available

✅ After-Sales Service – Ongoing technical support throughout the product lifecycle

✨ Summary

The Calplas DPS-2040 AFM Vertical Multilayer Filter is the flagship model in the DPS range, delivering maximum industrial filtration capacity for Olympic-size pools and major aquatic facilities requiring flow rates up to 95.1 m³/h. Featuring an expansive 3.17 m² filter area, 212 precision nozzles, robust GRP construction, and 1,200mm deep filter bed optimised for AFM media, this filter represents the ultimate choice for the most demanding commercial applications. With powerful 158.5 m³/h backwash capacity, upgraded 6-inch sight glass, heavy-duty DN150 connections, and Calplas’s five decades of manufacturing excellence backed by a 5-year tank warranty, the DPS-2040 provides unmatched performance for commercial pools up to 760,000 litres. Contact Parts4Tubs today for expert project support and competitive pricing.