LD20-56 – High-Capacity 20" Activated Carbon Block Water Filter Cartridge
 
Advanced drinking water filtration for higher water consumption – up to 56,000 litres and 12 months of service life.
 
The LD20-56 is a high-performance, 20-inch coconut-based activated carbon block cartridge, developed for water filtration systems requiring both high capacity and excellent water flow.
With a filtration capacity of up to 56,000 litres and a flow rate of up to 16 litres per minute, the LD20-56 is ideal for larger households, high-consumption applications and compatible 20-inch water filter systems.
 
Its advanced activated carbon technology helps reduce a wide range of unwanted substances, including selected PFAS compounds, pesticides, chlorine, microplastics, pharmaceutical residues and organic chemicals, while retaining naturally occurring minerals.
 
Advanced Filtration for Cleaner, Better-Tasting Water
 
The LD20-56 uses compressed coconut-based activated carbon with an extensive internal surface area.
As water passes through the carbon block, many chemical contaminants are adsorbed onto the activated carbon, while the dense structure also provides physical filtration of suspended particles.
 
Helps reduce:
 
Selected PFAS compounds – including certain persistent organic contaminants
Pesticides and herbicides – selected agricultural chemicals and residues
Chlorine and chloramines – helping improve drinking water taste and odour
Disinfection by-products – including selected trihalomethanes (THMs)
VOCs and organic chemicals – certain solvents and other organic contaminants
Pharmaceutical residues – selected medicines and micropollutants
Selected heavy metals – depending on the specific contaminant
Microplastics and suspended particles
Sand, rust and sediment
Unwanted taste, odour and discolouration
 
Unlike reverse osmosis, activated carbon filtration retains naturally occurring dissolved minerals such as calcium and magnesium.
 
High Water Flow – Up to 16 Litres per Minute
 
The LD20-56 is designed for applications where a standard 10-inch cartridge may not provide sufficient filtration capacity or water flow.
 
Its larger 20-inch carbon block offers increased filtration media volume, making it particularly suitable for:
 
Larger households with higher daily water consumption
High-flow under-sink and household filtration systems
Compatible whole-house filtration installations, subject to required flow and water quality
Applications requiring extended cartridge replacement intervals
 
With a flow rate of up to 16 litres per minute, the LD20-56 combines high filtration capacity with convenient everyday water use.
 
Recommended replacement intervals:
 
Chlorinated water: Maximum 12 months
Non-chlorinated water: Maximum 6 months
Maximum filtration capacity: 56,000 litres
 
The cartridge should be replaced when either the maximum filtration capacity or recommended service interval is reached, whichever comes first.
Actual service life depends on water quality, consumption and operating conditions.
 
Quality Materials and Reliable Performance
 
The LD20-56 is manufactured using food-grade, BPA-free and lead-free materials.
Its coconut-based activated carbon block provides effective filtration without removing naturally occurring dissolved minerals.
 
The cartridge is designed for compatible standard 20-inch water filter housings, including Holmblad's larger filtration systems.
 
LD20-56 – High-capacity carbon block filtration, excellent water flow and cleaner, better-tasting water for up to 56,000 litres.