Recirculation Pumps Home › Forums › Public Forums › General Plumbing › Recirculation Pumps This topic has 1 reply, 2 voices, and was last updated 24 years, 3 months ago by SylvanLMP. Viewing 1 reply thread Author Posts 17 Oct 2000 at 8:57 pm #273708 MasterPlumbersKeymaster I have fitted to the central heating system a recirculation pump which has a switch to change the speed of the pump and a flow control device. Quetion how do you setup the pump to perform correctly. 19 Oct 2000 at 1:00 am #288355 SylvanLMPParticipant Check the pump curves and piping size to pevent excessive velocity Author Posts Viewing 1 reply thread You must be logged in to reply to this topic. Log In Username: Password: Keep me signed in Log In