Heating & plumbing specialists across Bristol and the South West
Urgent heating or plumbing problem? 0117 990 2735
Heating & plumbing specialists across Bristol and the South West
Urgent heating or plumbing problem? 0117 990 2735
We install and maintain a range of vented and unvented hot water cylinders for any size of home throughout Bristol and the surrounding areas.
Tell us about your home and your current hot water set-up, and we’ll get back to you to talk through the options.
No obligation. Your information is only used to respond to your enquiry.
No heating or urgent leak? Call 0117 990 2735.
Vented & unvented hot water cylinders, Bristol
Our fully qualified engineers install vented and unvented hot water cylinders throughout Bristol and the surrounding areas, and service them afterwards to keep them safe and efficient.
Vented and unvented cylinders are two different ways of storing and distributing hot water in your home. The right choice depends on your mains water pressure, the space you have and your budget, and our knowledgeable engineers will help you make the right choice for you and your home.
We fit cylinders in a variety of sizes and capacities from leading manufacturers to suit any household, often alongside a new system or regular boiler. Our engineers are G3 qualified, so you can have peace of mind that a pressurised unvented cylinder is installed and serviced safely.
[VERIFY WITH AMW — “leading manufacturers” is from the live page; confirm which cylinder brands AMW fits before naming any]
Vented or unvented?
Both types store hot water heated by your boiler. The difference is where the water pressure comes from, and that changes what suits your home.
Fed straight from the mains, an unvented (pressurised) cylinder gives a continuous flow of hot water at high pressure, with no cold water storage tank in the loft.
Strong showers from several taps at once, a lower risk of contamination with no loft tank, excellent energy efficiency and safety features built in. Your mains pressure needs to be good enough.
A vented cylinder is fed by a cold water tank in the loft, using gravity for pressure. They come in various sizes, from a home for one to a large family.
Built to last, easy to install and low maintenance, with good insulation to keep water hotter for longer. A sensible choice for homes with older pipework.
Because they work under pressure, unvented cylinders have temperature and pressure relief valves and an expansion vessel, which need checking regularly.
Losing the loft tank can free up space, while a vented cylinder may suit a home that already has one. We’ll look at your pipework and water pressure first.
Replacing your boiler too? A combi needs no cylinder at all, while system and regular boilers do. See our boiler installations or read about what kind of boiler to install.
Unvented cylinder servicing
Unvented cylinders store hot water under high pressure, and their safety devices need to be checked regularly to prevent dangerous situations. Manufacturers generally recommend an annual service, and it is often a condition of the cylinder’s warranty.
Under Building Regulations Part G, an unvented cylinder must be installed by a competent, suitably qualified installer. Our engineers hold the G3 unvented qualification, so they can install and service yours safely.
[VERIFY SAFETY COPY WITH AMW — Part G / G3 wording, the warning signs list and the discharge-pipe safety line are new copy (not on the live page); “annual service per manufacturer” is general guidance]
Very hot water or steam from the discharge pipe? Switch off the boiler or heat source and the immersion heater, keep clear of the pipe, don’t touch or adjust the valves and call a G3 qualified engineer.
How it works
01
We look at your household’s hot water use, your mains water pressure, your pipework and where the cylinder will go.
02
We explain whether vented or unvented suits you, the size you need and what it will cost, before any work starts.
03
We fit the cylinder, its controls and safety devices, and test everything, including the discharge pipework on unvented systems.
04
We show you how it works and what to look out for, and can service it every year to keep it safe and your warranty valid.
Why service your cylinder?
A local Bristol team, based in Patchway, with G3 qualified engineers who look after vented and unvented cylinders as well as the boilers that heat them.
Insurance requirements or warranties on your cylinder may make regular servicing a condition of cover or warranty validity.
Servicing catches issues like leaks or corrosion early, which can extend the life of your cylinder and reduce the risk of a serious breakdown.
Regular checks of the safety devices lower the chances of a system failure and the possibility of damage to your property.
A well-maintained cylinder gives a continuous hot water supply with minimal wasted hot water, which helps keep your bills down.
Book your boiler and cylinder in together and the same engineer can look after both in one visit.
Qualified. Accredited. Accountable.
Gas work must only be carried out by a Gas Safe registered engineer, and oil systems by an OFTEC registered technician. Our accreditations mean the work in your home is done to recognised standards, properly certified and registered where it needs to be.
Up to 12-year boiler guarantees available on selected Worcester Bosch models and installations. Terms apply.
Our engineers are registered to work safely and legally on gas appliances.
Gas Safe registration no. 576406
Qualified to install, commission and service oil-fired boilers and tanks.
OFTEC registration no. C501845
Trained on Worcester Bosch boilers, with extended guarantees on selected models.
Registered to design and install Nu-Heat underfloor heating systems.
Qualified to install and service unvented hot water cylinders.
Questions
Can’t see your question here? Call the team on 0117 990 2735 or browse all our FAQs.
A vented cylinder is fed by a cold water storage tank in the loft and relies on gravity for pressure. An unvented cylinder is fed directly from the mains, so it delivers hot water at mains pressure without a loft tank. Unvented cylinders usually give stronger showers and free up loft space, but they need good mains pressure and a G3 qualified installer.
Yes. Building Regulations Part G require unvented hot water systems to be installed by a competent person, which in practice means an installer holding the G3 unvented qualification, and the work must be properly notified. Our engineers are G3 qualified, so they can install, service and repair unvented cylinders safely.
Most manufacturers recommend an annual service, and many make it a condition of the warranty. During a service we check the pressure and temperature relief valves, the expansion vessel charge, the pressure reducing valve and the discharge pipework, so the safety devices will work if they’re ever needed.
It depends on your mains water pressure and flow rate, the space you have and your budget. Unvented cylinders suit homes with good mains pressure and more than one bathroom. If your pressure is low or your pipework is older, a vented cylinder may be the better option. We’ll test and advise before recommending anything.
No. A combi boiler heats water on demand, so there’s no cylinder or loft tank. If you have high hot water demand, though, a system boiler with an unvented cylinder can be the better choice. Our boiler installations team can help you compare.
We install and service hot water cylinders throughout Bristol, Bath, Clevedon, Nailsea, Portishead, Weston-super-Mare, Yate, Corsham and the surrounding areas, from our base in Patchway. Get in touch to arrange a visit.
Related services
Efficient new gas, oil and LPG boilers, including system and regular boilers with a cylinder.
Find out more
Annual servicing for gas, oil and LPG boilers across Bristol and the South West.
Find out more
Wet underfloor heating from Nu-Heat registered installers.
Find out more
Leaks, valves, pipework and more, fixed by the same local team.
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Areas we cover
From our base in Patchway, we install and service hot water cylinders across Bristol, Bath, Clevedon, Nailsea, Portishead, Weston-super-Mare, Yate and Corsham, and the towns and villages in between.
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Surrounding towns and villages
Get in touch with the AMW Heating team to find out more about hot water cylinder installations and servicing.
