3-Stage Big Blue Descale + UV Water Filtration System – 20 Inch, 2720 L/h (Sediment + Carbon Block + Siliphos + 55W UV)

The 3-Stage Big Blue Descale + UV Filtration System is a whole-house water treatment solution that provides clear, safe, and scale-free water to every tap. With the addition of a 55W ultraviolet (UV) steriliser, this system not only protects plumbing and appliances but also ensures the water is free of bacteria, viruses, and pathogens.

Built with 20-inch Big Blue housings and designed for a flow rate of 2720 litres per hour, this unit is ideal for households, small businesses, guesthouses, or agricultural setups requiring both filtration and disinfection.

Technical Specifications

• Flow rate: 2720 L/h

• Filter size: 20-inch Big Blue cartridges

• Inlet/outlet: 1” BSP thread

• Pressure rating: 2.5 – 6 bar

• Filtration stages:
  • Stage 1: 5 Micron Sediment Filter
  • Stage 2: Carbon Block Filter (CTO)
  • Stage 3: Refillable Siliphos Anti-Scale Cartridge
  • Final Stage: 55W UV Steriliser (stainless steel chamber)

• Includes: Wall-mounting bracket + housing spanner

Why Choose the 3-Stage Big Blue Descale + UV System?

This system combines mechanical, chemical, and biological protection in one compact package:

• Sediment + Carbon: Removes turbidity, chlorine, bad taste, odour, and organic compounds.

• Siliphos Anti-Scale: Prevents scale formation and corrosion in pipes, geysers, and appliances.

• 55W UV Steriliser: Provides chemical-free disinfection by destroying 99.9% of bacteria, viruses, and pathogens.

This makes it perfect for applications where water must be safe for drinking and food production, such as vegetable tunnel irrigation.

What You Get

• 3 x 20” Big Blue filter housings with 1” BSP connections

• Stage 1: 5 Micron PP Sediment Cartridge

• Stage 2: Carbon Block (CTO) Cartridge

• Stage 3: Refillable Siliphos Cartridge (with media)

• Stage 4: 55W UV Steriliser (stainless steel chamber + ballast)

• Wall-mounting bracket

• Housing spanner

Benefits

• Whole-house filtration and disinfection in one system

• Removes sediment, silt, rust, and suspended solids

• Reduces chlorine, bad odour, and chemical taste

• Prevents limescale build-up and corrosion in plumbing

• Ensures microbiologically safe water with UV sterilisation

• Extends the life of appliances and irrigation equipment

• Safe, chemical-free, and eco-friendly

UV Installation Guide:

Applications

• Whole-house filtration for municipal and borehole water

• Borehole water treatment where bacteria may be present

• Guesthouses, lodges, and offices needing safe, clear water

• Irrigation of vegetables and crops requiring pathogen-free water

• Appliance and geyser protection from scale build-up

Filter & UV Maintenance Guide

To maintain optimal performance:

• Stage 1 – Sediment Filter (5 micron): Replace every 6 months

• Stage 2 – Carbon Block (CTO): Replace every 6 months

• Stage 3 – Siliphos Media: Top up every 2–3 months (max 4 kg per housing)

• Stage 4 – UV Lamp (55W): Replace annually (after 9,000 hours of use)

Routine maintenance ensures clean, safe, and scale-free water at all times.

Replacement Parts HERE: 

• 5 Micron Meltdown Cartridge (only) 
• Carbon Block (only)
• Siliphos Cartridge (only)
• Siliphos loose media per kg
• Housing Spanner
• Replacement O-ring (single)
• 55W UV Replacement Lamp
• 55W UV Quartz Sleeve
• 55W UV Ballast