High-Capacity Limescale Protection for Large Boilers and Water Heaters

Protect your heating system and maintain peak energy efficiency with the Boiler Descaler 23 Lpm. Utilizing advanced Watts OneFlow® Technology, this system provides a chemical-free, maintenance-free solution to hard water problems, specifically designed for higher flow rate requirements.

While the standard model handles up to 18 litres per minute, this 23 Lpm version is engineered for larger households or light commercial applications where a higher volume of hot water is required without a drop in pressure.

Why Choose the 23 Lpm Boiler Descaler?

• Superior Scale Prevention: Uses Template Assisted Crystallization (TAC) to convert hardness minerals into harmless, inactive microscopic crystals. These crystals stay suspended in the water and are washed away instead of sticking to your boiler’s heat exchanger.

   

• Increased Capacity: Features a larger 1000ml dose of OneFlow anti-scale media (compared to 750ml in the 18 Lpm model) to effectively treat water at flow rates up to 23 litres per minute.

• Energy Efficiency: Even a thin layer of limescale (1.6mm) can reduce heating efficiency by up to 12%. This system keeps your heat exchanger clean, lowering energy bills and extending the life of your appliance.

• Eco-Friendly & Chemical Free: Unlike traditional water softeners, OneFlow adds no salt or chemicals to your water, requires no electricity, and produces zero waste water.

   

• Retains Healthy Minerals: It targets scale-forming minerals without removing the beneficial calcium and magnesium that are essential for health.

Product Features

• Virtually Maintenance Free: No salt to add or valves to program. Simply replace the cartridge every 1-2 years.

   

• Simple Installation: Designed to be installed on the cold water feed to your boiler or water heater.

• Compact Design: Heavy-duty "Big Blue" style housing provides a robust solution that fits into most utility spaces.

Technical Specifications

• Flow Rate: Up to 23 Litres Per Minute (Lpm).

   

• Media Volume: 1000ml Watts OneFlow Anti-Scale Media.

• Operating Temperature: 10°C - 52°C.

• Max Pressure: 125 PSIG (8.6 bar).

• Dimensions: Approx. 40cm (H) x 20cm (W) x 20cm (D). Note: Allow 7cm clearance for cartridge changes.

Your Kit Includes:

• 1 x High-flow filter housing with 1" BSP female ports.

• 1 x Heavy-duty mounting bracket.

• 1 x Watts OneFlow 23 Lpm Cartridge (OFTWH-R-RM).

• 1 x Housing spanner for easy maintenance.

• Full fitting instructions.

Note: For the best results, ensure your water is filtered for chlorine prior to the descaler. OneFlow starts working immediately, though it may take up to 90 days to clear existing residual scale from your pipes