💦 Waterco 1050 SPDD Commercial Bobbin Wound Filter Tank – 4 Bar, Air Scour Nozzle Plate System

Advanced air/water backwash technology delivering up to 25% water savings for commercial pool filtration

🏊 Product Overview

The Waterco 1050 SPDD Commercial Bobbin Wound Filter Tank represents the entry point to Waterco’s premium SPDD range, featuring the innovative Air Scour Nozzle Plate System that revolutionises backwash efficiency. With a 1050mm tank diameter and 0.87 m² filter area, this filter delivers a 26 m³/hr flow rate while reducing backwash water consumption by up to 25% compared to conventional systems.

Unlike standard deep bed filters, the SPDD incorporates a plate and nozzle system that introduces pressurised air directly into the bottom of the filter media bed. This uniform air/water introduction creates vigorous agitation and optimal bed expansion during backwash cycles, dramatically reducing backwash times while achieving superior media cleaning. For commercial operators where water costs and environmental compliance matter, the SPDD delivers measurable operational savings.

Built using Waterco’s precision digitally-controlled filament winding technology, this commercial filter tank features seamless bobbin-wound fibreglass construction engineered for decades of reliable service. The 1200mm deep media bed provides exceptional particle capture while the 90mm (3-inch) flange connections ensure compatibility with commercial pump systems. Supplied as tank only with 4 bar pressure rating and manhole access for easy maintenance.

✨ Key Features

✅ Air Scour Nozzle Plate System – Pressurised air injection for superior backwash efficiency

✅ Up to 25% Less Backwash Water – Significant water and chemical savings for commercial operators

✅ Reduced Backwash Times – Faster cleaning cycles minimise system downtime

✅ 1050mm Tank Diameter – Entry-level SPDD model handling pools up to 208,000 litres

✅ 0.87 m² Filter Area – Commercial-grade filtration capacity with 26 m³/hr flow rate

✅ 90mm / 3″ Flange Connections – Standard commercial sizing for easy system integration

✅ 1200mm Deep Media Bed – Superior in-depth particle capture and extended filter runs

✅ 1,485 kg Sand Capacity – Substantial media volume for excellent dirt-holding capacity

✅ Manhole Access – Easy inspection and maintenance access to nozzle plate system

✅ Advanced Bobbin Wound Construction – Seamless fibreglass vessel with exceptional durability

✅ 4 Bar Pressure Rating – Engineered for demanding commercial system pressures

✅ Corrosion & UV Resistant – Premium fibreglass withstands chemicals and outdoor exposure

📊 Technical Specifications

Specification	Value
Model	SPDD 1050
Filter Type	Commercial Sand/Media Filter with Air Scour (Tank Only)
Tank Diameter	1050 mm
Filter Bed Depth	1200 mm
Filter Area	0.87 m²
Flow Rate	26 m³/hr (at 30 m³/hr/m²)
Working Pressure	4 Bar (58 psi)
Maximum Working Temperature	50°C
Connection Size	3″ / 90 mm (Flange)
Sand Media Capacity	1,485 kg
Glass Media Capacity	1,221 kg
Gravel Capacity	223 kg (if using support layer)
Tank Height (Overall)	2270 mm
Tank Width	1077 mm
Empty Weight	278 kg
Tank Material	Fibreglass Reinforced Polyester (Bobbin Wound)
Lateral System	Nozzle Plate with Air Scour
Access	Manhole for inspection and maintenance
Warranty	10 years tank (5 years full + 5 years pro rata), 1 year components

📏 Pool Sizing Guide

Sizing Principle:

The filter’s flow rate should achieve complete pool water turnover within the required timeframe. Commercial pools typically require 6-hour turnover rates for optimal water quality, with 8-hour turnover acceptable for lower-demand applications.

Formula:

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

Pool Capacity Compatibility:

Application	Turnover Time	Maximum Pool Volume
🏨 Hotel/Resort Pool	6 hours	156,000 litres
🏋️ Fitness Centre Pool	6 hours	156,000 litres
🏫 School/College Pool	6 hours	156,000 litres
🏢 Community Centre Pool	6-8 hours	156,000-208,000 litres
🏊 Competition Training Pool	6 hours	156,000 litres

This Filter:

📍 Flow Rate: 26 m³/hr at design velocity
📍 Optimal Pool Size: Up to 156,000 litres (6-hour turnover)
📍 Maximum Pool Size: Up to 208,000 litres (8-hour turnover)

💡 Why Choose SPDD? The Air Scour Nozzle Plate System reduces backwash water by up to 25% compared to conventional filters – delivering significant savings on water costs and reduced environmental impact for commercial operations.

🔌 Installation Requirements

Plumbing Specifications

Requirement	Specification
Inlet Connection	90 mm / 3″ Flange
Outlet Connection	90 mm / 3″ Flange
Connection Type	Flange
Filter Configuration	Side Mount
Air Scour Connection	Required for nozzle plate operation

Physical Installation

Requirement	Details
Base	Solid, level concrete pad required
Clearance Above	Minimum 600 mm for manhole access and media maintenance
Clearance Around	Minimum 600 mm for valve operation and air scour connections
Access	Manhole provides direct access to nozzle plate system
Lifting Equipment	Required – 278 kg empty weight
Floor Loading	Verify capacity (filled weight approximately 1,800 kg)

Pump & Air Scour Compatibility

⚠️ Important: This filter requires both pump and air blower connections for full functionality.

Pump Requirements:

• Recommended flow rate: 20 – 26 m³/hr
• Maximum flow rate: Do not exceed 26 m³/hr
• Connection: 90mm / 3″ to match filter flanges

Air Scour Requirements:

• Compatible air blower for pressurised air injection
• Appropriate pipework to nozzle plate connection
• See Waterco air blower accessories for specifications

💡 Note: This is a tank-only product. Multiport valves, face pipework kits, air blowers, and pumps are sold separately. Contact Parts4Tubs for complete system specifications.

🧹 Maintenance Guide

Air Scour Backwash Procedure

The SPDD’s nozzle plate system enables a more efficient two-stage backwash:

Stage 1 – Air Scour:

1. Set multiport valve to backwash position
2. Activate air blower (pump off)
3. Allow air to agitate media bed for 2-3 minutes
4. Air breaks up compacted media and dislodges trapped debris

Stage 2 – Water Backwash:

1. Switch off air blower
2. Activate pump for water backwash
3. Continue until sight glass runs clear
4. Total backwash time significantly reduced vs conventional filters

Routine Maintenance Schedule

Task	Frequency	Procedure
Check pressure gauge	Weekly	Record baseline and monitor for increases
Visual inspection	Weekly	Check for leaks, unusual sounds, pressure anomalies
Air scour backwash	When pressure rises 0.5-0.7 bar above baseline	Follow two-stage procedure above
Rinse after backwash	After each backwash	30-60 seconds to settle media
Inspect manhole seal	Quarterly	Check for wear, replace if necessary
Check nozzle plate	Annually	Inspect via manhole for damage or blockages
Full media replacement	Every 5-7 years (sand) or 10+ years (glass)	Replace completely

Pressure Gauge Guide

📊 Clean Filter Baseline: Establish after fresh media installation
📊 Backwash Trigger: 0.5-0.7 bar above baseline
📊 Maximum Operating Pressure: 4 bar

Water Savings Calculation

With up to 25% reduction in backwash water:

Conventional Backwash	SPDD Air Scour Backwash	Annual Savings*
2,000 L per cycle	1,500 L per cycle	26,000 L/year
3,000 L per cycle	2,250 L per cycle	39,000 L/year
4,000 L per cycle	3,000 L per cycle	52,000 L/year

*Based on weekly backwash frequency

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🪨 Filter Media Information

Compatible Media Types

Media Type	Filtration Rating	Capacity Required	Lifespan	Key Benefits
Silica Sand	20-40 microns	1,485 kg	5-7 years	Economical, proven performance
Glass Media	5-15 microns	1,221 kg	10+ years	Finer filtration, longer life
ZeoSand/Zeolite	3-5 microns	As specified	5 years	Superior clarity, ammonia removal
AFM (Activated Filter Media)	1-5 microns	As specified	10+ years	Bio-resistant, self-sterilising

Standard Media Configuration:

• Sand Capacity: 1,485 kg (16/30 grade silica sand)
• Glass Media Capacity: 1,221 kg
• Support Gravel: 223 kg (deduct from sand capacity if used)

💡 Air Scour Benefit: The nozzle plate system works particularly well with glass media, providing thorough bed cleaning while being gentle on the media particles.

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🔬 Filtration Performance

Metric	Value
Filter Area	0.87 m²
Design Flow Rate	26 m³/hr
Design Velocity	30 m³/hr/m²
Bed Depth	1200 mm (deep bed design)
Backwash Efficiency	Up to 25% water reduction

Air Scour Technology Advantage

The SPDD’s nozzle plate system delivers superior backwash performance:

• Uniform Air Distribution: Pressurised air introduced evenly across entire filter bed
• Vigorous Agitation: Air bubbles break up compacted media and dislodge trapped particles
• Optimal Bed Expansion: Consistent media fluidisation throughout backwash cycle
• Faster Cleaning: Reduced backwash duration saves time and labour
• Water Conservation: Up to 25% less backwash water consumption
• Better Media Cleaning: More thorough debris removal extends media life

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⚙️ Valve Positions & Functions

Note: Multiport valve sold separately – 3″ rated valve required

Position	Function
Filter	Normal filtration mode – water flows through media bed
Backwash	Reverse flow with air scour – superior media cleaning
Rinse	Settles media after backwash – brief forward flow to waste
Waste	Bypass filter – pump directly to drain
Recirculate	Bypass filter – return to pool without filtration
Closed	Stop all flow – isolate filter from system

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🎯 Ideal Applications

Application	Suitability	Notes
🏨 Hotel & Resort Pools	✅ Excellent	Water savings reduce operating costs
🏋️ Fitness Centre Pools	✅ Excellent	Efficient backwash minimises downtime
🏫 School & College Pools	✅ Excellent	Reduced water consumption meets environmental targets
🏢 Municipal Pools	✅ Excellent	Cost-effective operation for public facilities
🏊 Competition Pools	✅ Excellent	Superior water clarity for training facilities
🌍 Water-Conscious Installations	✅ Ideal	Up to 25% backwash water savings

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❓ Frequently Asked Questions

Q: What is the difference between SPDD and SMDD filters?

A: The SPDD features a Nozzle Plate Air Scour System that introduces pressurised air into the filter bed during backwash, reducing water consumption by up to 25% and improving cleaning efficiency. The SMDD uses a conventional fishtail lateral system without air scour capability.

Q: What size pool will this filter handle?

A: The SPDD 1050 is suitable for pools up to 156,000 litres with a 6-hour turnover, or up to 208,000 litres with an 8-hour turnover.

Q: Do I need additional equipment for the air scour system?

A: Yes, you’ll need a compatible air blower and appropriate pipework to connect to the nozzle plate system. Contact Parts4Tubs for air scour accessories.

Q: How much water will I save with the air scour system?

A: Waterco states up to 25% reduction in backwash water compared to conventional filters. Actual savings depend on your backwash frequency and water quality.

Q: How does the air scour backwash work?

A: The two-stage process starts with air injection (pump off) to agitate and loosen debris from the media, followed by water backwash to flush the loosened material to waste. This combination achieves better cleaning with less water.

Q: What media capacity does this filter require?

A: The filter requires 1,485 kg of sand or 1,221 kg of glass media – substantial capacity for excellent dirt-holding in commercial applications.

Q: Is this a complete filter system?

A: No, this is a tank-only product. You will need to purchase a 3-inch multiport valve, face pipework, air blower, and pump separately.

Q: What warranty is included?

A: Waterco provides a 10-year tank warranty (5 years full cover plus 5 years pro rata) and 1-year warranty on components.

Q: What maintenance access does this filter have?

A: The SPDD features manhole access for direct inspection of the nozzle plate system and easy media maintenance.

📥 Downloads & Resources

📄 SPDD Technical Datasheet – Full specifications and dimensions for all SPDD models

🏆 Why Choose the Waterco 1050 SPDD

✅ Air Scour Technology – Up to 25% less backwash water than conventional filters

✅ Reduced Operating Costs – Water and chemical savings add up over time

✅ Faster Backwash Cycles – Minimise system downtime and labour costs

✅ Superior Media Cleaning – Nozzle plate ensures thorough bed cleaning

✅ Commercial-Grade Construction – Bobbin wound fibreglass for decades of service

✅ Deep Bed Filtration – 1200mm media depth for exceptional water clarity

✅ Environmental Benefits – Reduced water consumption meets sustainability goals

✅ Comprehensive Warranty – 10-year tank warranty provides peace of mind

🤝 Why Buy from Parts4Tubs

✅ UK-Based Company – Local support and expertise from pool industry specialists

✅ Fast UK Delivery – Efficient dispatch on commercial equipment orders

✅ Expert Technical Advice – Get sizing recommendations and system design guidance

✅ Competitive Pricing – Commercial-grade equipment at excellent value

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

✅ Complete System Components – Valves, pipework, air blowers, and media available

✅ Easy Returns – 30-day returns on eligible products

⭐ Summary

The Waterco 1050 SPDD Commercial Bobbin Wound Filter Tank delivers advanced air scour technology for commercial pools seeking superior backwash efficiency and reduced water consumption. The innovative nozzle plate system reduces backwash water by up to 25% compared to conventional filters, providing significant operational savings for hotels, fitness centres, schools, and municipal pools. With 0.87 m² filter area, 26 m³/hr flow rate, and 90mm (3-inch) connections, this filter handles pools up to 156,000 litres (6-hour turnover). The 1,485 kg sand capacity and 1200mm deep bed ensure exceptional dirt-holding and water clarity. Manhole access provides easy inspection of the air scour system. Advanced bobbin-wound fibreglass construction delivers decades of reliable commercial service. Supplied as tank only with 4 bar pressure rating. Backed by Waterco’s comprehensive 10-year tank warranty.