If you're unsure which product you need read our guide to selecting the right product, or use our product selector tool.Ī gravity-fed system is either positive or negative head. It is common for gravity fed systems to suffer with low pressure, installing one of our gravity fed shower pumps can help to improve the pressure, click here to see our range gravity-fed shower pumps.īefore choosing a gravity fed shower pump it is important to know whether your system is positive head of negative head, click here for further information. Once an outlet requiring hot water is opened, gravity will force cold water from the cold-water storage tank into the hot water cylinder, this will then force hot water out from the top of the cylinder, delivering hot water to the open outlet. The cold-water storage tank also feeds the hot water cylinder, where a heating coil from the boiler or immersion heater will cause the cold water to become hot.
Cold water from the cold-water storage tank is then supplied to the outlets around the system, such as taps, toilets, showers and baths.
These systems rely on gravity to force water around the system, with the height of the cold-water storage tank determining the pressure throughout the system.Ĭold water is delivered to the cold-water storage tank from the water mains. A gravity fed system is identified by a cold-water storage tank, usually stored in a loft, and a hot water cylinder.