The Katalox Light® Media FRP Vessel 18x65 – Automatic Backwash Complete System is a high-capacity filtration unit designed for efficient removal of iron, manganese, hydrogen sulphide, and suspended solids in residential, commercial, agricultural, and industrial water treatment applications.

Built around a robust 18x65 FRP media vessel with 4" top and bottom openings, this system includes a fully automatic Runxin 4" backwash valve, correctly sized internal piping, and both top and bottom distributors for even media flow distribution.

Pre-loaded with 150 kg of Katalox Light® media (5 x 30kg bags), this unit is engineered for continuous performance, low maintenance, and optimal flow handling of up to 4,600 litres per hour.

What's Included

• 1 x FRP Vessel – 18” x 65”, 4" top & bottom openings (Weight: 33.57 kg)

• 1 x Runxin 4" Automatic Filtration Valve

• 1 x PVC Riser Pipe – 50mm (1½")

• 1 x Top Distributor – Male Thread for 4” Valve

• 1 x Bottom Distributor – For 4” Base Opening

• 5 x 30kg Bags of Katalox Light® Media (Total: 150 kg)

Total Shipment Weight (Incl. Media): ±183.57 kg
Dimensions (L x H): 48.8 cm x 202.7 cm

Key Features & Benefits

• Advanced Filtration Media – Katalox Light® removes iron, manganese, hydrogen sulphide, and turbidity with high oxidation and retention capacity.

• High Flow Design – Ideal for applications requiring flow rates of 3200–4600 L/h.

• Automatic Backwash Valve – Ensures consistent media performance and extended life through programmable backwashing.

• 4” Head & Base Configuration – Provides optimal water distribution and easy access for servicing.

• Large Media Volume – 150 kg of pre-supplied Katalox Light® included for proper fill level.

• Corrosion-Resistant FRP Vessel – Durable and non-metallic design, suitable for harsh water environments.

Technical Specifications

• Vessel Size: 18” x 65”

• Opening Size: 4” (Top and Bottom)

• Recommended Flow Rate: 3200 – 4600 litres per hour

• Vessel Volume: 269 litres

• Riser Pipe: 50 mm (1½") PVC

• Media Included: 150 kg (5 x 30 kg bags of Katalox Light®)

• Valve Type: Runxin 4" Automatic Backwash

• Vessel Weight (Empty): 33.57 kg

• Total Weight (With Media): ±183.57 kg

• Dimensions: 48.8 cm diameter x 202.7 cm height

• Construction Material: Fibreglass Reinforced Plastic (FRP)

Why Choose the Katalox Light® 18x65 System?

This unit offers unmatched filtration performance for properties with elevated iron, manganese, or sediment issues. Engineered for high throughput and long service intervals, it is suitable for larger homes, lodges, processing facilities, or agricultural systems where water clarity and reliability are essential.

Ideal Applications

• Borehole or well water treatment

• Agricultural water purification

• Pre-treatment before RO or UV systems

• Commercial food processing or manufacturing

• Guesthouses, lodges, and high-demand households

Conditions for Operation

• Water pH Range: 5.8 – 10.5

• Freeboard Recommended: 50% of bed depth

• Backwash Flow Rate: 20 – 25 m³/h

• Service Flow Rate: 3.2 – 4.6 m³/h

• Max Operating Temperature: 45°C

• Operating Pressure: Up to 6 bar

Important Notes

• Product images are for illustrative purposes only. Actual components, colours, quantities, or scale may vary slightly from images shown.

• Filter media must be rinsed during backwash start-up before connecting to service water lines.

• For best results, install a sediment pre-filter if water contains visible particles above 100 microns.

• Installation by a qualified plumber is recommended.