Unvented hot water cylinder installers
Imagine waking up on a chilly morning, going to the shower and being met with a powerful flow of hot water – no spluttering, no waiting, just performance every time. If that sounds appealing, then consider installing an unvented hot water cylinder.

JPS Plumbing, hot water cylinder installation experts
Why put up with old systems and cold water tanks taking up valuable loft space? Upgrade to an unvented cylinder and enjoy modern efficiency, better water pressure and a sleek, space-saving design.
Whether you’re building a new home, renovating or just upgrading your current setup, we have the expertise to bring you the comfort and reliability you deserve. Let us take the hassle out of your hot water system so you can get on with enjoying your home.
What are unvented hot water cylinders?
An unvented hot water cylinder is a very efficient storage unit that connects directly to the mains pressure supply, meaning that there is no need for a traditional cold water storage tank in your loft.
Unlike vented systems, which rely on gravity to deliver hot water, unvented cylinders use the pressure from the mains, meaning better flow and a consistent supply.
These systems are ideal for homes with limited space, as you don’t need a bulky loft tank. They can also deliver hot water at a higher pressure, making them perfect for modern bathrooms with powerful showers and those with multiple bathrooms.


How do unvented hot water cylinders work?
Unvented hot water cylinders connect to the mains water supply to deliver a steady stream of high-pressure water. Depending on your setup, the cylinder is heated by a boiler, immersion heater or heat pump. Once the water reaches the desired temperature, it’s stored under pressure within the cylinder until needed.
Unvented cylinders are reliable and completely safe hot water systems. They are fitted with pressure release valves, thermostats, and expansion vessels to ensure the water remains safe and controlled, meeting strict UK government building regulations.
Our unvented hot water cylinder installation service
At JPS Plumbing, Gas and Electrical, we provide an efficient and professional unvented cylinder installation service. We’ll make sure your new cylinder is installed, maintained, and checked to the highest standards.
Here’s what you can expect:
Installation
Our expert engineers will assess your home to recommend the best unvented hot water cylinder for your needs based on the size of your property, the number of bathrooms and the number of people. We can take care of everything, including the removal of your existing hot water cylinder or vented cylinder. We will ensure your cylinder is set up for optimal performance and in compliance with all building regulations.
Maintenance
Regular maintenance is crucial for keeping your hot water cylinder working efficiently. Our maintenance services include vital checks, cleaning, and inspecting safety components. By maintaining your system, you can enjoy peace of mind as well as reliable hot water for years to come.
Safety Checks
Safety is a priority with any hot water system. We will conduct thorough inspections of your unvented hot water cylinder, including checking the pressure release valves, thermostats, and seals, to ensure they comply with UK safety standards.
Loft Tank Removal
If your property still has a traditional cold water storage tank, we can safely remove it during the upgrade, giving you back valuable space in your loft.
Book appointment or report an emergency repair
All our boilers come with an up to 10-year parts and labour warranty. Call 02381 733139 to speak with one of our advisers to book your repair or appointment now.

Why choose JPS Plumbing, Gas and Electrical?
When it comes to installing unvented hot water cylinders, you need a team you can trust. At JPS Plumbing, Gas and Electrical, we pride ourselves on delivering excellent service. Our highly experienced engineers have extensive experience in hot water cylinder installation and will ensure your system is installed efficiently and safely.
All our work complies with UK government building regulations, so you can rest assured your system meets all necessary safety and efficiency standards.
Emergency Response
Same day or next day response means your waterworks can be fixed at your earliest convenience!
Guaranteed Satisfaction
All products come with a manufacturer’s 12month warranty. Along with our trusted services you can’t go wrong!
Free Quotes
Free no obligation quotes on all of our services. Allowing you to manage your finances, while we provide quality services.
Customer Reviews
Read our reviews on Google, Checkatrade, and TrustATrader…
Here at JPS all of our tradesmen are trained and qualified within all of our services. But don’t just take our word for it, see what our customers have to say…
John, Eastleigh
Easy to get hold of, came out quickly, identified the problem and did a temporary fix then returned the following day for a proper fix with the part needed. On time, courteous and clean. Have used JPS Plumbing and Heating before and will definitely use again.
Review via Checkatrade
Pauline, Southampton
Fabulous knowledgeable workmen. Gave me a few options to proceed with, explaining benefits of each one. Work completed was great quality. Can’t fault it.
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David, Southampton
Prompt and effective service. Would happily use this firm again.
Review via Checkatrade
Jacqui, Eastleigh
We had a new heating system installed, which required all old radiators removed and new fitted, boiler removed from kitchen and new boiler put in attic. Scott did an excellent job. His expertise, professionalism and worksmanship were faultless. The company are a well run outfit. Would recommend.
Review via Checkatrade
Pauline, Southampton
Fabulous knowledgeable workmen. Gave me a few options to proceed with, explaining benefits of each one. Work completed was great quality. Can’t fault it.
Review via Google
Frequently asked questions about unvented hot water cylinder installation
How much does it cost to install an unvented hot water cylinder?
The cost of unvented cylinder installation varies depending on the size of the cylinder, the complexity of the installation, and whether you need additional services, like removing a cold water tank. Contact us for a detailed quote tailored to your property.
How long should an unvented hot water cylinder last?
With proper care and regular maintenance, a good quality unvented hot water cylinder should last between 10 and 25 years. Regular servicing helps ensure your system stays efficient and prolongs its lifespan.
Do unvented hot water cylinders need servicing?
Yes, regular servicing is essential. Annual inspections ensure that safety features like pressure release valves and thermostats are working properly to prevent potential issues and ensure compliance with building regulations.
Contact the team today
To arrange a quotation, call us today on 01962 448013 (Winchester) or 02381 733139 (Southampton). Alternatively, fill out our contact form, and we will be in touch.