💧 Waterco 750 SMDD Commercial Bobbin Wound Filter Tank – 4 Bar, 1.2 Metre Deep Bed

Compact deep bed filtration delivering commercial-grade performance for smaller pools and light commercial applications

🌊 Product Overview

The Waterco 750 SMDD Commercial Bobbin Wound Filter Tank is the compact entry point to Waterco’s acclaimed SMDD deep bed commercial filter range. With a 750mm tank diameter and 0.44 m² filter area, this filter delivers a 13 m³/hr flow rate, making it the ideal choice for smaller commercial pools, boutique hotels, fitness centres, spa facilities, and light commercial applications where deep bed filtration performance is required in a space-efficient package.

Featuring 63mm (2-inch) flange connections and the same generous 1200mm deep media bed as larger SMDD models, the 750 provides the enhanced particle capture and extended filter runs that deep bed technology delivers. Despite its compact footprint, this filter offers the same advanced construction quality and proven reliability found throughout the SMDD range.

Manufactured using Waterco’s precision digitally-controlled filament winding technology, this filter tank features seamless bobbin-wound fibreglass construction that commercial operators trust for decades of reliable, virtually maintenance-free service. The tank-only configuration with 4 bar pressure rating provides complete flexibility for system specification.

⭐ Key Features

✅ 750mm Tank Diameter – Compact footprint ideal for space-constrained plant rooms

✅ 0.44 m² Filter Area – Deep bed filtration for pools up to 104,000 litres

✅ 63mm / 2″ Flange Connections – Standard sizing compatible with common commercial pumps

✅ 1200mm Deep Media Bed – Same superior in-depth filtration as larger SMDD models

✅ 795 kg Media Capacity – Substantial dirt-holding capacity for extended filter runs

✅ Advanced Bobbin Wound Construction – Seamless fibreglass vessel with outstanding structural integrity

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

✅ Fishtail Lateral System – Waterco’s patented design eliminates dead spots and maximises efficiency

✅ Double Yoke Lid with Lifting Eye – Safe handling during installation and maintenance

✅ Service Hatch & 8-Bolt Flanges – Standard equipment for easy access and secure connections

✅ Large Clear Sight Glass – Visual backwash monitoring for optimal media cleaning

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

🔧 Technical Specifications

Specification	Value
Model	SMDD 750
Filter Type	Commercial Sand/Media Filter (Tank Only)
Tank Diameter	750 mm
Filter Bed Depth	1200 mm
Filter Area	0.44 m²
Flow Rate	13 m³/hr (at 30 m³/hr/m²)
Working Pressure	4 Bar (58 psi)
Maximum Working Temperature	50°C
Connection Size	2″ / 63 mm (Flange)
Sand Media Capacity	795 kg
Glass Media Capacity	630 kg
Gravel Capacity	120 kg (if using support layer)
Tank Height (Overall)	2044 mm
Tank Width	772 mm
Empty Weight	Approximately 86 kg
Tank Material	Fibreglass Reinforced Polyester (Bobbin Wound)
Lateral System	Fishtail Configuration
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. Light commercial and smaller pools typically require 6-8 hour turnover rates to maintain water quality.

Formula:

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

Pool Capacity Compatibility:

Application	Turnover Time	Maximum Pool Volume
🏨 Boutique Hotel Pool	6 hours	78,000 litres
🏋️ Fitness Centre Pool	6 hours	78,000 litres
🧖 Spa/Hydrotherapy Pool	4-6 hours	52,000-78,000 litres
🏠 Large Residential Pool	8 hours	104,000 litres
🏢 Small Commercial Pool	6-8 hours	78,000-104,000 litres

This Filter:

📍 Flow Rate: 13 m³/hr at design velocity
📍 Optimal Pool Size: Up to 78,000 litres (6-hour turnover)
📍 Maximum Pool Size: Up to 104,000 litres (8-hour turnover)

💡 Tip: The SMDD 750 is the entry-level model in the SMDD range, offering deep bed filtration technology in the most compact package available. For larger pools, consider the SMDD 900 (19 m³/hr) or SMDD 1050 (26 m³/hr).

🔌 Installation Requirements

Plumbing Specifications

Requirement	Specification
Inlet Connection	63 mm / 2″ Flange
Outlet Connection	63 mm / 2″ Flange
Connection Type	8-Bolt Flange
Filter Configuration	Side Mount

Physical Installation

Requirement	Details
Base	Solid, level concrete pad required
Clearance Above	Minimum 500 mm for lid removal and media access
Clearance Around	Minimum 600 mm for valve operation and maintenance
Access	Service hatch for media inspection and replacement
Lifting Equipment	Recommended – 86 kg empty weight
Floor Loading	Verify capacity (filled weight approximately 900 kg)

Pump Compatibility

⚠️ Important: Filter must be matched with appropriate pump rated for 2″ pipework.

• Recommended Pump Flow Rate: 10 – 13 m³/hr
• Maximum Flow Rate: Do not exceed 13 m³/hr to prevent media migration
• Minimum Flow Rate: Ensure adequate velocity for proper filtration
• Connection: 63mm / 2″ to match filter flanges

💡 Note: This is a tank-only product. Multiport valves, face pipework kits, and pumps are sold separately. Contact Parts4Tubs for compatible valve and pipework options.

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🧹 Maintenance Guide

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
Backwash	When pressure rises 0.5-0.7 bar above clean baseline	Until sight glass runs clear
Rinse after backwash	After each backwash	Run for 30-60 seconds to settle media
Inspect sight glass	Monthly	Clean if visibility reduced
Check O-rings and seals	Quarterly	Replace if worn or damaged
Inspect media level	Annually	Top up if below recommended level
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

⚠️ Warning: Never operate above rated pressure. If pressure remains high after backwashing, inspect for blockages or media issues.

Backwash Considerations

The 795 kg media capacity requires appropriate backwash water management:

• Ensure adequate drainage capacity
• Sufficient water supply for rinse cycle
• Compliance with local discharge regulations
• Consider backwash water treatment if required

Winterisation (UK Climate)

For outdoor installations or extended shutdown periods:

1. Isolate pump and close all valves
2. Set multiport valve to “Waste” position
3. Open manual drain and allow tank to empty completely
4. Remove drain plug and store safely
5. Open all connections to prevent trapped water
6. Cover or protect from direct weather exposure
7. Never leave water in filter during freezing conditions

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🪨 Filter Media Information

Compatible Media Types

Media Type	Filtration Rating	Capacity Required	Lifespan	Key Benefits
Silica Sand	20-40 microns	795 kg	5-7 years	Economical, widely available, proven performance
Glass Media	5-15 microns	630 kg	10+ years	Finer filtration, reduced backwash frequency, longer life
ZeoSand/Zeolite	3-5 microns	As specified	5 years	Superior clarity, ammonia removal properties
AFM (Activated Filter Media)	1-5 microns	As specified	10+ years	Bio-resistant, self-sterilising, exceptional clarity

Standard Media Configuration:

• Sand Capacity: 795 kg (16/30 grade silica sand)
• Glass Media Capacity: 630 kg
• Support Gravel: 120 kg (deduct from sand capacity if used)

💡 Recommendation: For facilities seeking superior water quality, glass media provides finer filtration and significantly longer service life, offering excellent value despite higher initial cost.

Signs Media Needs Replacing

• Persistent poor water clarity despite correct chemical balance
• Shortened filter cycles between backwashes
• Media visible in pool return water
• Channelling or uneven flow distribution
• Excessive pressure drop or abnormally low resistance

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🔬 Filtration Performance

Metric	Value
Filter Area	0.44 m²
Design Flow Rate	13 m³/hr
Design Velocity	30 m³/hr/m²
Bed Depth	1200 mm (deep bed design)

Filtration Rating by Media Type

Media	Filtration Rating	What It Captures
Sand (standard)	20-40 microns	Visible debris, leaves, hair, large particles
Glass media	5-15 microns	Fine particles, most algae, improved clarity
AFM/Zeolite	1-5 microns	Very fine particles, colloidal matter, exceptional clarity

Deep Bed Advantage

The 1200mm media bed depth – the same as all SMDD models – provides significant advantages over standard high-rate filters:

• Enhanced Particle Capture: Finer dirt particles and colloidal substances are trapped more effectively throughout the deeper media bed
• Increased Dirt Capacity: Longer filter runs between backwashes, reducing water and chemical consumption
• Multi-Media Capability: Deep bed supports layered media configurations for staged filtration
• Compact Footprint: Deep bed design allows smaller diameter tank while maintaining filtration quality

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⚙️ Valve Positions & Functions

Note: Multiport valve sold separately – 2″ rated valve required

Position	Function
Filter	Normal filtration mode – water flows through media bed
Backwash	Reverse flow to clean media – directs debris to waste
Rinse	Settles media after backwash – brief forward flow to waste
Waste	Bypass filter – pump directly to drain (lowering water level)
Recirculate	Bypass filter – return to pool without filtration
Closed	Stop all flow – isolate filter from system

🎯 Ideal Applications

Application	Suitability	Notes
🏨 Boutique Hotel Pools	✅ Excellent	Compact footprint, commercial reliability
🏋️ Fitness Centre Pools	✅ Excellent	Deep bed handles variable bather loads
🧖 Spa & Hydrotherapy Pools	✅ Excellent	Superior clarity for therapeutic applications
🏠 Large Residential Pools	✅ Very Good	Commercial-grade upgrade for discerning owners
🏢 Small Commercial Pools	✅ Very Good	Entry-level commercial deep bed solution
🏫 Small School/College Pools	✅ Good	Reliable performance for educational facilities

❓ Frequently Asked Questions

Q: What size pool will this filter handle?

A: The SMDD 750 is suitable for pools up to 78,000 litres with a 6-hour turnover, or up to 104,000 litres with an 8-hour turnover.

Q: Is this the smallest SMDD model available?

A: Yes, the SMDD 750 is the entry-level model in the SMDD range, offering deep bed filtration in the most compact package available.

Q: How does this compare to the larger SMDD models?

A: The SMDD 750 uses 2″ (63mm) connections versus the 3″ connections on the SMDD 900-1200. For larger pools, consider stepping up to the SMDD 900 (19 m³/hr) which offers 46% more capacity.

Q: How much media does this filter require?

A: The filter requires 795 kg of sand or 630 kg of glass media. This provides excellent dirt-holding capacity for its size class.

Q: How often do I need to backwash?

A: Backwash when the pressure gauge reads 0.5-0.7 bar above the clean filter baseline. Frequency depends on bather load but typically every 1-2 weeks.

Q: Is this a complete filter system?

A: No, this is a tank-only product. You will need to purchase a 2-inch rated multiport valve, face pipework kit, and compatible pump separately. Contact Parts4Tubs for complete system specifications.

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 all other components.

Q: Can this filter be used for saltwater pools?

A: Yes, the fibreglass construction is fully resistant to saltwater and chlorinated environments.

Q: What pump do I need?

A: Match with a pump delivering approximately 10-13 m³/hr at your system head pressure with 2-inch connections.

📥 Downloads & Resources

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

🏆 Why Choose the Waterco 750 SMDD

✅ Compact Performance – Deep bed filtration in the smallest SMDD package

✅ Same Deep Bed Technology – 1200mm media depth as larger models

✅ Space-Efficient Design – Ideal for constrained plant rooms

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

✅ Proven Reliability – Waterco’s patented fishtail lateral system

✅ Excellent Value – Entry-level pricing with commercial performance

✅ Long-Term Durability – Corrosion-proof fibreglass construction

✅ 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

✅ Compatible Parts Available – 2″ multiport valves, pipework kits, and media in stock

✅ Easy Returns – 30-day returns on eligible products

✨ Summary

The Waterco 750 SMDD Commercial Bobbin Wound Filter Tank is the compact entry point to Waterco’s acclaimed SMDD deep bed range, delivering commercial-grade filtration for boutique hotels, fitness centres, spa facilities, and smaller commercial pools up to 78,000 litres (6-hour turnover). Despite its space-efficient 750mm diameter, this filter features the same 1200mm deep media bed as larger SMDD models, providing enhanced particle capture and extended filter runs. With 0.44 m² filter area, 13 m³/hr flow rate, and 63mm (2″) connections, this filter is ideal for applications where deep bed performance is required in a compact package. Advanced fibreglass construction and Waterco’s patented fishtail lateral system ensure decades of reliable performance. Supplied as tank only with 4 bar pressure rating. Backed by Waterco’s comprehensive 10-year tank warranty.