During the operation of a wet type central heating system, the boiler pumps heated water through a circuit of pipes to radiators in rooms throughout the home. Every radiator has control valves dictating the rate at which the water flows, which controls the amount of time the water is in the radiator and the amount of heat that is radiated. The water leaves the radiator, it is returned to the boiler to be reheated. Dalston Plumbers know these systems. The pipes lose heat as the water moves around the system, their small diameter and the flow rate keeps this low. There are systems that are designed well and have many smaller circuits out from the pump, rather than just large. This configuration ensures the last radiator heats up just as efficient as the first. Pipe Material and Sizes:All the radiators fitted in a modern wet central heating systems are connected by 15mm copper pipework. Pipework that links the boiler, pump and the points were the circuits split are 22-28mm diameter. Capillary solder joints are the most secure (apart from connections to boiler, pump and valves), as they are less likely to leak. Plastic pipework has been made to use in wet central heating systems, however these cant connect straight to the boiler, so a short copper tail is used. A Dalston Plumber can work with copper pipes.Two-Pipe System:New modern heating set ups use a two-pipe feature, where hot water exits the pump and enters through the inlet valve of every radiator via a flow pipe. This ends at the last radiator. There is a second pipe, called the return pipe which takes the cooler water from the radiators and returns it back to the boiler to be re-heated.Single-Pipe System:There is an older single pipe layout, where hot water flows through a single radiator, and is returned to a floor pipe that takes it to the next and so on, but loses heat each time. Therefore, radiators at the end of the run have to be large in to radiate the same heat.
