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What Hot Water System Do You Have?

What type of water system do I have?

The type of hot water system you have within your home can affect which shower types are best suited for installation. Use our guide below to identify what hot water system you have and how to find out which type of shower would be compatible. If you are in any doubt when selecting a shower for your home needs, we recommend that you ask your plumber or heating engineer for their professional opinion.

Gravity fed

With a gravity fed system the hot water for your shower is stored within a hot water cylinder and cold water is stored in a cold-water tank (this is often located in the loft). The water supply uses gravity to generate the required power so that you can use it when showering. Gravity fed water systems allow a homeowner to choose from a large range of shower types as they work with mixer showers, electric showers, electric power showers and pumped digital showers.

High pressure vented system (using a combi boiler)

Combi boilers are connected directly to the mains water supply and heats water on demand as it flows through the appliance, the water is then distributed to the hot water outlets within the property using the mains water pressure. Showers that are installed as part of a high pressure vented system are able to utilise the supply of hot water that is provided by the boiler and can therefore rely on an instantaneous hot water supply. Properties with a combi boiler installed have the choice of installing a mixer shower, electric shower or a digital shower within their bathroom. However, it is important to note that you cannot use a shower pump with a combi boiler system as the speed of the water supply is dictated by the mains water pressure.

High pressure unvented systems

If you have a high-pressure unvented system you will find an expansion vessel next to your boiler and a hot water cylinder which stores the water you use for your shower. With high-pressure unvented systems there is no cold-water tank. High-pressure unvented systems will successfully work with mixer showers, electric showers, electric power showers and un-pumped digital showers.

At Direct Heating Supplies, we sell an extensive range of showers to suit every households hot water system. Click here to purchase your shower at a low price with exceptional customer service and eligibility for free delivery if your order is over £50 exc VAT.