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Unvented hot water cylinders
RCB Plumbing Ltd provides professional boiler installation services across South London and Surrey including Sutton, Carshalton and Epsom. Our Gas Safe registered engineers ensure a seamless transition to At RCB Plumbing, we provide professional unvented hot water cylinder services for homeowners across Sutton, Surrey and South London. We work with customers who need a new cylinder installed, an older unit replaced, or an existing system repaired and maintained by a qualified team.
Unvented hot water cylinders are designed to deliver stored hot water at mains pressure, which makes them a popular choice for homes that want strong flow rates and reliable performance. Because these systems operate under pressure, they must be installed and worked on correctly, with proper attention to safety, compliance and long-term reliability.
That is where experience matters. Our team takes a practical, straightforward approach from first visit to final checks. We explain what is needed, recommend the right solution for your home and carry out the work with care, whether you are in Sutton, Carshalton, Epsom or the surrounding areas.
For expert local help with unvented hot water cylinders, contact RCB Plumbing today. your new, energy-efficient heating system with minimal disruption to your home.
Unvented hot water cylinder installation
A new unvented hot water cylinder should be sized and installed to match the way your household actually uses hot water. At RCB Plumbing, we assess your property, current system, available space and hot water demand before recommending the right cylinder and setup.
Our installation service covers both new systems and replacement cylinders. We can remove an old unit, fit the new cylinder, connect the relevant pipework and controls, and make sure the full setup is working as it should. The aim is not just to fit the unit, but to give you a system that performs well day after day.
Professional installation is essential with unvented cylinders because the system includes important safety components and discharge pipework that must be installed correctly. A poor setup can lead to weak performance, wasted energy or safety issues, so it is important to use a qualified team that understands the job properly.
Once the installation is complete, we test the system carefully and talk you through how it works, so you feel clear on what has been done and what to expect.
Book your installation assessment with RCB Plumbing for a safe and reliable unvented cylinder setup.
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Unvented hot water cylinder benefits
An unvented hot water cylinder can be a very good option for homes that want stronger hot water performance and a more modern system. When installed correctly, it offers a range of practical benefits.
Strong hot water pressure – Because the system works from the mains supply, you can enjoy better pressure at taps, showers and baths.
Good flow for busy homes – Unvented cylinders are well suited to properties with multiple bathrooms or higher hot water demand.
Reliable hot water storage – The system stores hot water ready for use, helping the home keep up with day-to-day demand.
Space-saving setup – There is no need for a separate cold water storage tank in the loft, which can free up useful space.
Cleaner, modern solution – The system is designed to provide a neater and more efficient hot water setup in many homes.
Suitable for upgrades – It can be a strong replacement option for older vented systems that no longer suit the property.
The right system still depends on the property, water pressure and household needs, which is why proper advice is important before any work begins.
Speak to RCB Plumbing today to find out if an unvented cylinder is the right fit for your home.
Unvented water cylinder repair and maintenance
Like any pressurised hot water system, an unvented cylinder needs proper care to stay safe, efficient and reliable. At RCB Plumbing, we carry out repairs and maintenance for customers whose system is no longer performing as it should or needs routine attention.
Common issues can include a drop in hot water performance, pressure-related faults, leaking components, noisy operation or problems with valves and controls. When these faults are left unchecked, they can affect both comfort and system reliability. Our approach is to assess the issue properly, identify the cause and carry out the right repair rather than guesswork.
Routine maintenance is just as important. Regular servicing helps check that safety devices, expansion components and controls are working correctly, while also helping spot wear before it turns into a larger problem. This is especially important with unvented cylinders because safety and performance go hand in hand.
Whether your system needs a one-off repair or ongoing servicing, we aim to keep the process clear, efficient and well organised.
If your unvented cylinder needs attention, contact RCB Plumbing today to arrange a professional check.
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Our trusted unvented hot water cylinder process
We keep the customer journey simple from the start, so you know what to expect and feel confident in the work being carried out.
1. Initial enquiry
You contact us with your hot water issue, planned upgrade or installation enquiry, and we gather the key details.
2. Home assessment
We assess the property, current setup, hot water demand and available space to understand what is needed.
3. Clear recommendations and quote
We explain the most suitable options and provide a clear quote for the work, with no unnecessary complications.
4. Installation, repair or service
We carry out the agreed work carefully and efficiently, whether that is a new installation, fault repair or planned maintenance visit.
5. Testing and handover
We complete the final checks, make sure the system is operating properly and talk you through the finished work.
Our aim throughout is to provide straightforward advice, tidy workmanship and a service that feels easy to trust from start to finish.
Contact RCB Plumbing now to book your assessment and get your unvented hot water cylinder service underway.
Frequently Asked Question
Do unvented hot water cylinders need good mains pressure?
Yes, they rely on the incoming mains supply, so good water pressure and flow are important for the system to perform properly.
Can an unvented cylinder work with more than one bathroom?
Yes, they are often a good option for homes with multiple bathrooms because they can provide strong hot water flow to several outlets.
How long does an unvented cylinder installation usually take?
This depends on the property and whether it is a straight replacement or part of a wider system change, but many installations can be completed within one to two days.
Are unvented cylinders suitable for older homes?
In many cases, yes, but the property, pipework and incoming mains supply all need to be assessed first.
What size cylinder do I need?
That depends on the number of bathrooms, the size of the household and your normal hot water usage.
Can you replace an old vented system with an unvented cylinder?
Yes, if the property is suitable, we can advise on upgrading from a vented system to an unvented one.
Do unvented cylinders need servicing?
Yes, regular servicing is important to check safety components, maintain performance and help prevent future faults.
If you need clear advice on any unvented cylinder question, get in touch with RCB Plumbing today.
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