The Everbuild P11 Central Heating System Cleanser is a concentrated treatment solution designed to remove flux residues and sludge from central heating systems. This powerful cleanser restores circulation in older systems suffering from blockages whilst effectively removing commissioning debris from new installations. Ideal for use during system commissioning, component replacement or when extending existing central heating systems, the P11 formula works safely with all metals commonly found in heating systems, including aluminium. The concentrated solution is compatible with plastic tanks and microbore pipework, making it suitable for both traditional and modern heating installations. The economical formula delivers excellent coverage, with just 1 litre treating a 100 litre system capacity. This concentrated cleanser helps maintain optimal system performance by removing deposits that reduce heating efficiency and cause circulation problems, making it an essential product for heating e