3-Stage Big Blue Descale Water Filtration System – 20 Inch, 2720 L/h

(Sediment + Carbon Block + Siliphos Cartridge)

The 3-Stage Big Blue Descale Filtration System is a point-of-entry whole-house water filter that delivers clean, fresh water to every tap while protecting your plumbing and appliances from limescale build-up.

With its 20-inch Big Blue housings and 2720 L/h flow capacity, this system is suitable for households, small businesses, and light industrial setups that want reliable water treatment without the hassle of chemicals or electricity.

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

• Includes: Steel wall-mounting bracket + housing spanner

Why Choose the 3-Stage Big Blue Descale System?

Unlike standard whole-house filters, this system goes beyond just improving taste and clarity — it actively protects your infrastructure.

• Siliphos Anti-Scale Technology: Food-grade polyphosphate prevents scale deposits and corrosion by forming a protective film inside pipes, geysers, and appliances.

• Long-Term Savings: Prevents breakdowns and extends the lifespan of geysers, kettles, washing machines, and dishwashers.

• Safe & Chemical-Free: Works without electricity or chemical dosing, making it eco-friendly and low-maintenance.

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 initial media fill)

• Wall-mounting bracket

• Housing spanner

Benefits

• Removes sediment, silt, rust, and other suspended solids

• Reduces chlorine, bad odour, and chemical taste

• Prevents scale build-up in pipes, geysers, and heating elements

• Protects against corrosion in metal plumbing systems

• Supplies filtered water to every tap in the house

• Easy to maintain with affordable, widely available replacement cartridges

Applications

• Whole-house filtration for municipal or borehole water

• Protection for geyser heating elements and appliances

• Small commercial setups (offices, guesthouses, cafés)

• Irrigation systems where scaling is a concern

Filter Replacement Guide

Filter lifespan depends on water quality and usage. As a general guideline:

• 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)

Routine maintenance ensures your system continues delivering fresh, safe water while protecting your plumbing and appliances.

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)