For domestic purposes, two-pipe feed and return loop pipework is the most popular type of arrangement to supply hot water to home radiators or alternative heating devices like heated towel rails.
In large commercial settings, single pipe loop systems are the contrasting common choice, incorporating an extremely large loop pipe. These single loop systems can deliver hot water to an unlimited number of heating components in theory, so is perfect for a large-scale business property with multiple convector radiators, for instance.
If you would like a more detailed insight into all sorts of heating pipework configurations, explore our Ultimate Guide To Heating Pipework.