A Shower Power Booster can be used to drive water towards or from a radiator or group of radiators which are not getting hot. In many homes radiators do not get hot due to air locks, poor pipework or due to being located some distance from the boiler.
You can install the pump on either the flow or return to the radiator(s). You need to operate the pump manually and it can be activated by simply switching it on and off at the socket, using a radio remote, using a timer or by being linked to the central heating system.
Diagram 12.2 Manual Pump (SP1) improving the flow to a radiator.