After installing a central-heating system the system and its associated pipework should be flushed with water to get rid of debris and flux that can be left behind during the installation. This debris if left in the system can cause corrosion or damage to the valves and more importantly the pump. Professionals like Brixton Plumbers will carry out this work as standard. In order to protect the pump whilst the cleaning routine is carried out it’s best to remove it, maintaining system integrity with a length of pipe. Once this is carried out and the pump is replaced it is much easier to turn the pump impeller with a screwdriver before running the system after flushing, in order to make sure it’s clear and free to turn. If you can feel resistance, drain the system and remove the motor again, then clean and refit the impeller if required. Carried out by a Brixton Plumber as part of their service, a full descaling and cleansing regime can be employed if your system is old or badly corroded. A harsh cleaner or descaler could expose minor leaks sealed by corrosion so use a mild cleanser, introduced into the system via the feed-and expansion tank or into a radiator via the bleed valve. Manufacturers’ instructions vary, but in principle run the cleanser through the system for a week, with the boiler set to a fairly high temperature. Afterwards, turn off and drain the system, then refill and drain it several times if possible, using a hose to run mains-pressure water through the system while draining it. Some cleansers must be neutralized before you can add a corrosion inhibitor. If your boiler is making loud banging noises, treat it and the immediate pipe work with a fairly powerful descaler, running the hot water program only. Of course at any point if you are not confident, call a professional.
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