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I believe that my utility supplier will install a isolation device between the main 100 amp incomer fuse and my consumer unit and thereby remove the need to break the main Manweb seal on the 100 amp incomer fuse. Is this true, is it free, what is it called. It will certainly make life...

All pumped central heating system using 2 2-port valves to control Heating & DHW. Replacing boiler, pump and controls soon what are the merits of 2 x 2-port valves versus 1 x 3-port diverter valve. If I stay with 2 x 2-port valves and have TRV's on ALL rads do I still need a small bore...