System layout and pipework
Most modern domestic installations use a two-pipe layout: a flow main to every radiator and a separate return, which gives each radiator the same water temperature and makes balancing meaningful. Older one-pipe and microbore arrangements deliver progressively cooler water along the circuit and block far more easily.
Pipe sizing is not guesswork. Undersized pipework starves the far end of the system and makes the pump work harder; oversized pipework wastes water volume and slows response. Runs through unheated spaces are insulated, and clipping and support are done properly so the system does not creak and knock as it heats.









