💧 Lacron Finaflow FF24416 24″ Sand Filter Tank – 13.5m³/h Flow Rate

Commercial-grade filtration with deep media bed technology for exceptional water clarity

🌊 Product Overview

The Lacron Finaflow FF24416 is a professional-grade 24″ (610mm) sand filter tank from the renowned Finaflow range, designed for commercial and domestic pools requiring superior filtration performance. With a robust 13.5m³/h flow rate and deep media bed technology, this filter delivers exceptional particle capture and extended dirt retention that standard filters simply cannot match.

Manufactured by Lacron (part of the Waterco Group), the FF24416 features the signature Finaflow deep bed design where the minimum 1-metre media depth ensures significantly longer contact time between water and filter media. This extended contact captures finer dirt particles and colloidal substances to a far greater level than shallow-bed alternatives, resulting in noticeably clearer water with reduced chemical demand.

The tank is constructed from extremely hard-wearing glass reinforced polyester (GRP) with a smooth high-gloss internal and external finish that ensures free water flow and easy cleaning. All internal components and pipework are upgraded to the highest commercial standard, ensuring long service life and minimal maintenance requirements. Supplied as a tank only unit, the FF24416 offers flexibility to specify your preferred valve configuration for bespoke installations. Backed by Lacron’s proven 35+ year track record in the pool and spa industry, this filter represents the professional choice for demanding filtration applications.

⭐ Key Features

✅ Deep Media Bed Technology – Minimum 1-metre filtration bed depth for superior particle capture and extended dirt retention

✅ Commercial-Grade Flow Rate – 13.5m³/h capacity suitable for pools up to 108,000 litres

✅ Glass Reinforced Polyester Construction – Extremely hard-wearing GRP tank with smooth high-gloss finish inside and out

✅ Hydraulically Balanced Laterals – Optimised water distribution maximises filtration efficiency and backwash performance

✅ Clear Inspection Lid – Easy visual monitoring of media condition without system shutdown

✅ Media Sight Glass – Observe filter bed condition during operation and backwash cycles

✅ Media Service Hatch – Rapid media removal for efficient maintenance and media changes

✅ Inflow Diffuser – Evenly distributes water flow across the entire filter bed surface

✅ Manual Air Vent & Water Drain – Essential controls for commissioning and winterisation

✅ UV & Corrosion Resistant – Built to withstand harsh pool environments and outdoor installation

✅ Pressure Tested to 4 Bar – Rigorous factory testing ensures reliable performance at 2.5 bar operating pressure

✅ 35+ Year Proven Track Record – Lacron’s established reputation for performance and reliability

⚙️ Technical Specifications

Specification	Value
Model	FF24416
Filter Type	Deep Bed Sand Filter (Tank Only)
Tank Diameter	24″ (610mm)
Flow Rate	13.5m³/h
Minimum Bed Depth	1 metre
Filtration Rating	20-40 microns (with sand media)
Test Pressure	4 bar
Maximum Working Pressure	2.5 bar
Tank Material	Glass Reinforced Polyester (GRP)
Internal Finish	Smooth high-gloss
Lateral System	Hydraulically balanced
Valve Included	No – Tank Only
Pressure Gauge	Not included
Air Vent	Manual
Water Drain	Manual
Inspection Lid	Clear – 204mm
Media Sight Glass	Yes
Service Hatch	Yes
Filter Base	Included for stable floor mounting
Manufacturer	Lacron (Waterco Group)

📐 Pool Sizing Guide

The Lacron Finaflow FF24416 delivers reliable filtration for medium to large residential pools and light commercial applications. Pool filtration systems should turn over the entire pool volume within 6-8 hours for optimal water quality.

Sizing Calculation:

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

Pool Size Compatibility:

Pool Type	Volume Range	Suitability
🏠 Medium In-Ground	50,000-80,000 L	✅ Excellent – optimal performance
🏠 Large In-Ground	80,000-108,000 L	✅ Very Good – 8-hour turnover
🏊 Large Above-Ground	40,000-70,000 L	✅ Excellent – premium filtration
🧖 Commercial Swim Spas	15,000-40,000 L	✅ Ideal – rapid turnover
🏨 Holiday Let Pools	Up to 80,000 L	✅ Excellent – reduced maintenance
🏢 Light Commercial	Up to 80,000 L	✅ Good – verify PWTAG compliance

This Filter:

📍 Flow Rate: 13.5m³/h
📍 Optimal Pool Size: Up to 81,000 litres (6-hour turnover)
📍 Maximum Pool Size: Up to 108,000 litres (8-hour turnover)

💡 Tip: For commercial installations, always verify filtration requirements against PWTAG guidelines. The deep bed design makes this filter particularly suitable for warmer water applications and pools with higher bather loads.

---

🛠️ Installation Requirements

Important: This is a tank only product. A multiport valve must be purchased separately.

Plumbing Connections:

Requirement	Specification
Valve Type Required	Side-mount multiport (purchased separately)
Recommended Valve	Lacron 6-way multiport valve
Connection Configuration	Refer to valve specifications

Physical Installation:

Requirement	Details
Base	Solid, level concrete pad – filter base included for stability
Clearance Above	Minimum 600mm for lid removal and maintenance
Clearance Around	Minimum 500mm for service hatch access
Location	Protect from direct sunlight where possible
Orientation	Ensure service hatch and sight glass are accessible

Pump Compatibility:

⚠️ Important: The filter must be correctly matched with an appropriately sized pump.

Parameter	Recommendation
Recommended Pump Flow	10.0 – 13.5m³/h
Maximum Pump Flow	Do not exceed 13.5m³/h
System Pressure	Must not exceed 2.5 bar during operation

💡 Note: As a tank only unit, the FF24416 offers installation flexibility. Consult with your pool professional regarding valve selection and pipework configuration.

---

🔄 Maintenance Guide

Routine Maintenance Schedule:

Task	Frequency	Method
Check pressure gauge	Weekly	Note baseline reading when clean (gauge on valve)
Visual bed inspection	Weekly	Check through sight glass during operation
Backwash filter	When pressure rises 0.5-0.7 bar	Run until sight glass shows clear water
Rinse after backwash	After every backwash	60-90 seconds to settle media
Inspect valve seals	Seasonally	Replace if worn or leaking
Check media level	Annually	Top up if low via service hatch
Full media replacement	Every 5-7 years (sand)	Access via service hatch

Pressure Gauge Guide:

📊 Clean filter baseline: 0.8-1.2 bar (typical)
📊 Backwash recommended: 0.5-0.7 bar above baseline
📊 Maximum operating: 2.5 bar

Deep Bed Advantage: The 1-metre minimum bed depth provides significantly greater dirt-holding capacity than standard filters, meaning longer intervals between backwashes and reduced water wastage.

Winterisation (Essential for UK Climate):

1. Switch off pump and allow system to depressurise
2. Drain filter tank completely via manual drain
3. Open air vent to assist complete drainage
4. Remove and store drain plug safely
5. Leave valve (if fitted) in intermediate position
6. Cover filter or relocate to frost-free storage if possible

⚠️ Critical: The deep media bed retains significant water. Ensure complete drainage before freezing conditions to prevent tank damage.

---

🪨 Filter Media Information

The Lacron Finaflow FF24416’s deep bed design is optimised for use with specific filter media to achieve maximum performance and filtration efficiency.

Recommended Media Types:

Media Type	Size	Filtration Rating	Benefits
Lacronite (Zeolite)	As supplied	3-5 microns	Superior clarity, reduced chemicals, longer life
Filter Sand	0.5-1.4mm (16/30 grade)	20-40 microns	Economical, proven performance
Glass Media	0.5-1.0mm	5-15 microns	Finer filtration, eco-friendly

Media Capacity: Refer to manufacturer documentation or contact Parts4Tubs for specific media quantities for the FF24416.

💡 Lacronite Advantages: Lacron specifically recommends their Lacronite zeolite media which offers superior water clarity, remarkable dirt retention, reduced backwashing frequency, lower chemical costs, and improved bather comfort compared to traditional sand.

Signs Media Needs Replacing:

• Persistently cloudy water despite correct chemical balance
• Shortened filter cycles requiring frequent backwashing
• Visible media particles in pool returns
• Media channelling visible through sight glass
• Increased chemical consumption without improved clarity

Media Change Access: The FF24416 features a dedicated service hatch for rapid media removal, significantly reducing maintenance time compared to filters requiring complete disassembly.

---

✨ Filtration Performance

Metric	Value
Filtration Rating (Sand)	20-40 microns
Filtration Rating (Lacronite)	3-5 microns
Design Flow Rate	13.5m³/h
Minimum Bed Depth	1 metre
Deep Bed Advantage	Enhanced particle capture and dirt retention

Micron Rating Guide:

Rating	What It Removes
40+ microns	Visible debris, leaves, large particles
20-40 microns	Sand, dirt, visible suspended particles
10-20 microns	Fine particles, some algae spores
5-10 microns	Very fine particles, most algae
3-5 microns	Near-invisible particles, colloidal matter

Deep Bed Filtration Advantage:

The Finaflow’s minimum 1-metre media bed depth is the key to its superior performance. Unlike standard high-rate filters with shallow beds, the deep media provides:

• Extended Contact Time – Water remains in contact with media longer, capturing finer particles
• Enhanced Dirt Retention – Greater media volume holds more dirt before backwashing
• Colloidal Particle Capture – Removes fine suspended matter that passes through shallow beds
• Improved Water Clarity – Noticeably clearer water, especially in warmer pools
• Reduced Chemical Demand – Cleaner water requires fewer treatment chemicals

---

⚙️ Valve Information

Important: The FF24416 is supplied as a tank only unit. A multiport valve must be purchased separately.

Compatible Valve Options:

Valve Model	Description
ZZ3250NS	24″ Finaflow complete with valve & gauge
Lacron Multiport	6-way side-mount valve (various models)

Standard 6-Way Valve Functions:

Position	Function	When to Use
Filter	Normal filtration mode	Daily operation
Backwash	Reverses flow to clean media	When pressure rises above baseline
Rinse	Settles media after backwash	60-90 seconds after backwash
Waste	Bypasses filter, drains to waste	Vacuuming heavy debris
Recirculate	Bypasses filter, returns to pool	Distributing chemicals
Closed	Stops all water flow	Maintenance, winterisation

💡 Tip: If you require a complete filter system with valve and gauge pre-fitted, consider the ZZ3250NS package which includes the 24″ Finaflow tank with multiport valve and pressure gauge ready for installation.

---

🎯 Ideal Applications

Application	Pool Size	Suitability
🏠 Medium Residential In-Ground	50,000-80,000 L	✅ Excellent – ideal match
🏠 Large Residential In-Ground	80,000-108,000 L	✅ Very Good – 8-hour turnover
🏊 Premium Above-Ground	40,000-70,000 L	✅ Excellent
🧖 Commercial Swim Spas	15,000-40,000 L	✅ Ideal – rapid turnover
🏨 Holiday Rental Properties	Up to 80,000 L	✅ Excellent – low maintenance
🏢 Light Commercial	Up to 80,000 L	✅ Good – verify regulations
♨️ Warmer Water Pools	Various	✅ Specifically designed
🏊 High Bather Load Pools	Various	✅ Specifically designed

Particularly Recommended For:

• Pools and spas operating with warmer water temperatures
• Installations with higher bather loads requiring enhanced filtration
• Pool owners seeking superior water clarity with reduced chemical costs
• Replacement upgrades from standard shallow-bed filters
• Professional installations requiring commercial-grade reliability
• Bespoke systems requiring separate valve specification

❓ Frequently Asked Questions

Q: What size pool will this filter handle? A: The FF24416 is suitable for pools up to 108,000 litres with an 8-hour turnover, or optimally up to 81,000 litres with a 6-hour turnover. The 13.5m³/h flow rate provides excellent performance for medium to large residential pools.

Q: Does this filter come with a valve? A: No, the FF24416 is supplied as a tank only unit. You will need to purchase a compatible multiport valve separately. This allows flexibility to specify your preferred valve configuration. Alternatively, consider the ZZ3250NS which includes valve and gauge.

Q: How often do I need to backwash? A: Backwash when the pressure gauge reads 0.5-0.7 bar above your clean baseline. The deep bed design provides greater dirt-holding capacity, typically allowing longer intervals between backwashes compared to standard filters.

Q: What filter media should I use? A: Lacron recommends either Lacronite (zeolite) for superior 3-5 micron filtration, or 16/30 grade sand (0.5-1.4mm) for standard 20-40 micron filtration. Glass media is also compatible for enhanced performance.

Q: What is the advantage of the deep bed design? A: The minimum 1-metre media depth provides extended water contact time, capturing finer particles and colloidal substances that pass through shallow-bed filters. This results in noticeably clearer water, longer backwash intervals, and reduced chemical demand.

Q: Is this suitable for commercial use? A: Yes, the Finaflow range is specifically designed for commercial and domestic pools, particularly those with warmer water and higher bather loads. For commercial installations, verify compliance with PWTAG guidelines.

Q: How do I access the filter media for replacement? A: The FF24416 features a dedicated service hatch for rapid media removal, making maintenance significantly easier than filters requiring complete disassembly.

Q: What pump do I need? A: Pair with a pump delivering between 10.0-13.5m³/h. Never exceed the filter’s maximum flow rate of 13.5m³/h, and ensure system pressure stays within the 2.5 bar maximum operating pressure.

Q: What warranty is included? A: Lacron products are backed by manufacturer warranty. Contact Parts4Tubs for full warranty terms and conditions applicable to your purchase.

🏆 Why Choose the Lacron Finaflow FF24416

✅ Superior Deep Bed Filtration – 1-metre minimum bed depth captures finer particles than standard filters

✅ Commercial-Grade Construction – GRP tank with smooth high-gloss finish built to last

✅ Proven Performance – Lacron’s 35+ year track record of reliability in the pool industry

✅ Enhanced Water Clarity – Deep bed technology removes colloidal particles for noticeably clearer water

✅ Reduced Maintenance – Greater dirt capacity means longer intervals between backwashes

✅ Easy Servicing – Service hatch and sight glass simplify maintenance and media changes

✅ Installation Flexibility – Tank only configuration allows bespoke valve specification

✅ Ideal for Demanding Applications – Specifically designed for warmer water and high bather loads

✅ Lower Running Costs – Reduced chemical demand and backwash frequency save money

✅ Pressure Tested Quality – Every unit tested to 4 bar for assured reliability

🛒 Why Buy From Parts4Tubs

✅ UK-Based Company – Local support and expertise you can rely on

✅ Fast UK Delivery – Quick despatch to get your pool project moving

✅ Expert Advice – Our team understands pool filtration and can help with valve selection, media quantities, and installation queries

✅ Competitive Pricing – Great value on genuine Lacron equipment

✅ Full Warranty Support – We stand behind every product we sell

✅ Easy Returns – Hassle-free 30-day returns policy

✅ Complete Range – Matching valves, filter media, spare parts, and accessories available

✅ Trusted Supplier – Built on the success of buildahottub.com with years of industry experience

💦 Summary

The Lacron Finaflow FF24416 is a professional-grade 24″ (610mm) deep bed sand filter tank delivering superior filtration for pools up to 108,000 litres. Featuring a powerful 13.5m³/h flow rate, minimum 1-metre media bed depth, and commercial-grade GRP construction, this filter captures finer particles and colloidal substances that standard shallow-bed filters miss. The deep bed design provides extended backwash intervals, reduced chemical demand, and noticeably clearer water – particularly beneficial for warmer pools and high bather-load applications. Supplied as a tank only unit with service hatch, sight glass, and hydraulically balanced laterals, the FF24416 offers installation flexibility backed by Lacron’s proven 35+ year industry reputation. The professional choice for demanding pool filtration requirements.