I noticed water leaking from the (iron?) fitting (it has a hex pin at right angles to the direction of water flow) that sits below the pump (Grundfos) and links to the 22mm pipe; from the oxidation on the pipework below it must have been happening slowly for some time but is now fast enough that I need to see to it urgently. The same fitting above the pump is not showing any trouble.
I don't know how to shut off water so that I don't get a flood if I try to mend or replace this connector, and I also don't know if it is advisable to get someone to switch off the main central heating control (that bypasses the rest of the electrics I think) because we are dealing with hot water pipes here.
I have sketched for myself the locations of the stopcocks I can find, and there are five of those red "wheel" things and one with "wings". I can't work out which ones do what job, but two are behind the cylinder (one of these definitely on a pipe that branches off from the top of the cylinder), two are on pipes that appear to lead up into the roofspace and two are associated with the knot of piping near the pump and the base of the cylinder.
I suspect that if I mess with these without advice something else will go wrong! Please help, happy to call in an expert if that is what you advise but need to keep cost down!
I don't know how to shut off water so that I don't get a flood if I try to mend or replace this connector, and I also don't know if it is advisable to get someone to switch off the main central heating control (that bypasses the rest of the electrics I think) because we are dealing with hot water pipes here.
I have sketched for myself the locations of the stopcocks I can find, and there are five of those red "wheel" things and one with "wings". I can't work out which ones do what job, but two are behind the cylinder (one of these definitely on a pipe that branches off from the top of the cylinder), two are on pipes that appear to lead up into the roofspace and two are associated with the knot of piping near the pump and the base of the cylinder.
I suspect that if I mess with these without advice something else will go wrong! Please help, happy to call in an expert if that is what you advise but need to keep cost down!