Hot Water Cylinder Installation in Bournemouth

A hot water cylinder is an insulated tank that stores heated water, ready for use at taps, showers and baths. You need one if your home uses a system boiler or a conventional boiler — these heat water and store it in a cylinder rather than providing it on demand. If you have a combi boiler you do not have a cylinder, as combis heat water instantly from the mains. Cylinders suit larger homes with several bathrooms where hot water demand overlaps.

A vented cylinder relies on a cold water storage tank, typically in the loft, and uses gravity to feed water into the system — simpler and cheaper to install, but with lower pressure unless a pump is added. An unvented cylinder connects directly to the mains water supply, delivering hot water at full mains pressure to every tap and shower without a loft tank. Unvented systems suit modern homes with several bathrooms. We install both and will recommend the right option for your property's layout, water pressure and household demand.

Hot water cylinder installation in the Bournemouth and Poole area typically costs between £600 and £1,500, depending on the cylinder type, size and complexity. Unvented installations sit at the higher end because of the additional pipework, pressure vessel and compliance requirements. A like-for-like vented cylinder replacement is more straightforward and more affordable. We provide free, no-obligation quotes with transparent pricing and no hidden charges — call 07900 930999 to arrange your assessment.

A like-for-like cylinder replacement typically takes between 3 and 6 hours and is completed in a single visit. A more complex installation — switching from a vented to an unvented system, or fitting a cylinder in a new location — can take a full day, particularly if pipework or pressure system upgrades are needed. We will give you a clear time estimate before work begins.

Yes. Unvented hot water cylinders must be installed by an engineer holding a G3 Unvented qualification, as required by Part G of the Building Regulations. This is a legal requirement in the UK. Unvented systems operate under mains pressure and include safety devices such as pressure relief valves and expansion vessels, which must be correctly installed and tested by a qualified professional. Our engineers hold the necessary qualifications to install unvented cylinders safely and in full compliance.

A well-maintained hot water cylinder typically lasts between 20 and 25 years, though this varies with water quality, usage and how regularly it has been serviced. Signs a cylinder needs replacing include discoloured or rusty hot water, visible leaks around the tank, inconsistent water temperature, or a cylinder that no longer heats water efficiently. If yours is over 15 years old and showing any of these symptoms, we can assess it and advise whether repair or replacement is the better value.

Yes. A hot water cylinder can be heated independently using an electric immersion heater, which works like a large kettle element inside the tank. That is useful as a backup when the boiler is out of service, or as the main heat source in properties without a gas supply. Electric immersion heating is generally more expensive to run than gas, so it is best used as a secondary or emergency option. We can install or replace immersion heaters as part of a cylinder installation or as a standalone job.

Cylinder size is determined by the number of people in the household and the number of bathrooms. As a general guide, a 120-litre cylinder suits 1 to 2 people, 150 litres is right for a small family of 3 to 4, and 200 litres or larger is recommended for households of 5 or more, or properties with several bathrooms and high simultaneous demand. Choosing a cylinder that is too small means running out of hot water at peak times. We assess your household's usage before recommending a size.