Standard power flushing procedure carried out by the Members of the PowerFlush Association
(This version is written for homeowners to better understand the procedure. Our members have a much longer and more detailed procedure to follow as they are professionals in the field)

Step 1- Sludge remover or acidic cleaner (a chemical) gets added to the system to loosen up sludge. This can be done hours or days in advance depending on the chemical used.
Step 2 - Each radiator gets flushed in turn with the other radiators turned off. There is no need for physical removal of the radiators as it would make cleaning the pipes leading to and from that radiator impossible.
Step 3 - Frequent flow reversals during flushing to disturb the maximum amount of sludge
Step 4 - Magnetic filter gets used with the power flush machine to remove sludge faster and more effectively.
Step 5 - Boiler, radiators and all pipe work gets flushed until water runs clear.
Step 6 - Inhibitor (a chemical) gets added to system to prevent sludge in future.
Step 7 - System gets re-balanced radiator by radiator.

Works that might be needed, but is seen as outside the scope of a standard power flush by our Association and therefore we recommend members to exclude it from their prices as not everyone needs it done:
- In some cases there might be radiators that will have to be physically removed and washed out or flushed manually as the sludge in them, might be too thick or have pieces too large, to get flushed trough the narrowing in the radiator valve/s on either side.
- On combi boilers with hot water problems; the secondary heat exchanger might have to be manually removed and flushed out or de-scaled as power flushing the system cannot always clean this part and the sections of pipe leading up to and from it, completely.
 - On open vented systems (systems with water tank in loft) the “H” (section of pipe work) might have to be cut out and cleaned after / during the flush, because the build-up in this section tends to be hard and standard power flushing cannot always clean it completely.
- Removing radiator valves for any reason except to connect the power flush machine into the system.
- Fitting magnetic filters / any pipe work alterations.
- Any remedial works needed to the boiler or system.