Unvented Cylinder Installation
If your hot water can't keep up with the household, an unvented cylinder gives you strong, mains-pressure hot water at every tap and shower. We fit them properly, with all the safety controls checked and commissioned before we leave.
What's involved
Unvented cylinder work covers more than fitting the tank itself, here's what's included.
Survey and Sizing
We check your mains pressure, flow rate and hot water demand to work out the right cylinder for your household.
Cylinder Fitting
The cylinder is fitted on a solid, level base with all pipework and safety controls connected correctly.
Safety Controls and Discharge
Pressure relief valves, expansion vessels and discharge pipework are fitted and routed to comply with regulations.
Commissioning and Servicing
Full pressure testing, safety checks and handover, plus ongoing annual servicing to keep the system safe.
Better hot water pressure, done properly
An unvented cylinder stores hot water under mains pressure rather than relying on a loft tank, which usually means a noticeable improvement in shower performance and enough hot water for busier households. It suits homes without loft space for a traditional tank, or anyone fed up with weak flow at the shower or multiple taps running dry. It's not a job for shortcuts, the safety controls are what keep the system working correctly year after year.
We start with a proper survey, checking mains pressure, flow rate and how many bathrooms and outlets the system needs to serve. From there we size the cylinder correctly, so you're not left short on hot water or paying for more capacity than you need. The cylinder itself has to sit on a stable, level, load-bearing base, and every connection gets checked for leaks as the system is filled.
A properly commissioned cylinder should be quiet, safe and simply work every time you turn the tap.
Safety controls are non-negotiable on this kind of installation. That means an isolating valve, pressure-reducing valve, non-return protection, expansion vessel, and a temperature and pressure relief valve feeding into a tundish and discharge pipe that terminates somewhere visible and safe. Getting the discharge pipework wrong is one of the most common issues we see on older or poorly fitted systems, so we take care to route it correctly from the start.
More information
Once everything's connected, we pressure test the system, bleed any air out and check every safety device is functioning as part of a full commissioning process. We'll talk you through how the system works and what to look out for, particularly any discharge from the tundish, which is worth mentioning to us if it ever happens.
Tidy work and a system you don't have to think about again, that's the aim.
We are based in Woodingdean and cover Brighton, Hove, Worthing, Lewes, Shoreham-by-Sea, Haywards Heath, Seaford, Burgess Hill and surrounding Sussex towns, and we often fit unvented cylinders alongside a bathroom refit or a new boiler installation. Annual servicing keeps the safety controls in good order, and we're happy to take that on for cylinders we've fitted or ones already in place. If you're weighing up whether an unvented cylinder is right for your home, get in touch and we'll talk through what your system can realistically support.
Recent work
Nursery fit-out, first and second fix plumbing
Full first and second fix plumbing for the fit-out of a new nursery, including two 250 litre unvented cylinders, twelve toilets, twelve basins, sixteen sinks and around a mile of copper pipework. The project took six weeks, from an empty warehouse to an operating nursery.
Unvented cylinder installation in Surbiton
We completed the unvented cylinder installation on our Surbiton project, pairing a Joule cylinder with a Grundfos pump and a Vaillant boiler. The work is now finished and ready for the electricians.
Vaillant boiler and Joule unvented cylinder on a new build
We installed a Vaillant boiler and a Joule unvented cylinder on a new build project, with the whole system tested and commissioned before the pipework was lagged.
Boiler and unvented cylinder upgrade in Brighton
A heating system upgrade in Brighton. We removed a struggling old combi boiler and replaced it with a Vaillant heat only boiler and a Megaflo unvented cylinder.
Unvented cylinder installation in a loft
An unvented cylinder installed in the new loft of a full house refurbishment. The system is up and running and ready for lagging.
Worth considering
Hot Water Cylinder Installation
Tidy, fully tested vented and unvented hot water cylinder installation for homes across Brighton, Hove and Sussex.
Hot Water Cylinder Installation→Toilet Installation
Toilets repaired and fitted level, sealed and leak-tested, from a simple swap to a wall-hung pan, for homes across Brighton, Hove and Sussex.
Toilet Installation→Tap Repair
Tidy, reliable repairs for dripping, stiff or noisy taps across Brighton, Hove and surrounding Sussex towns.
Tap Repair→Low Water Pressure
Diagnosis and repair of low water pressure at taps, showers and appliances, for homeowners across Brighton, Hove and Sussex.
Low Water Pressure→Pipework Repair
Tidy, tested repairs for leaking, burst or corroded pipework, serving Brighton, Hove and nearby Sussex towns.
Pipework Repair→Immersion Heater Replacement
Faulty immersion heater? R.K Plumbing & Heating replace elements and seals safely, restoring hot water without fuss.
Immersion Heater Replacement→Before you book
Here's what homeowners usually ask us before going ahead with an unvented cylinder.
How long does an unvented cylinder installation take?
Do I need mains pressure checked before installing one?
Is an unvented cylinder safe?
Do unvented cylinders need annual servicing?
Will I need extra electrical or plumbing work done?
Are you qualified to install unvented cylinders?
Do you cover my area?
What happens if the tundish discharges water?
Let's talk about your hot water
Give us a call or send a message and we'll talk through whether an unvented cylinder is the right fit for your home.
Call 01273 911551