Boilers

Boiler Installation

Whether your old boiler has given up or you're planning ahead, we design and fit boiler systems that heat your home properly and run reliably for years to come. Our team handles every step, from the first survey to the final handover, so you're never left guessing what's happening in your own house.

Wall-mounted Vaillant boiler on a plywood board with new copper pipework

What's included in a boiler installation

From the first survey through to the final safety checks, here's what a proper boiler installation with us covers.

Boiler Surveys & Sizing

We assess your home, hot water demand and existing pipework to recommend the right boiler type and size before any work starts.

Combi, System & Regular Boilers

We install the boiler type that suits your property and household, matched to your radiators, hot water cylinder or existing system.

Old Boiler Removal & Replacement

Safe disconnection and removal of your old unit, including flue and associated pipework, before the new boiler goes in.

System Flushing & Controls Setup

Flushing the system, fitting a magnetic filter where needed, and setting up thermostats or smart controls so everything runs efficiently.

Getting your heating and hot water right, without the upheaval

A boiler installation isn't just swapping one box for another. It's the heart of your home's heating and hot water, so getting the sizing, positioning and setup right from day one matters. We start with a proper survey of your home, taking into account insulation, the number of bathrooms, your existing radiators and how much hot water you actually use, before recommending a boiler that fits.

If you're replacing an old boiler, we'll safely disconnect and remove it, including the old flue where needed, then prepare the space for the new unit. That means fitting brackets or a base, checking clearances, and making sure the flue route and ventilation meet current regulations. The new boiler is connected to your gas, water and electrical supplies, flushed through, pressurised and commissioned properly, with every safety check carried out before we call it finished.

A boiler installation should leave you with reliable heat and hot water, not a list of things to worry about.

We know the questions that come up before people commit: will it be disruptive, will floors need lifting, how long will the hot water be off, and what happens if something goes wrong afterwards. We talk through all of that upfront, so there are no surprises on the day. We are Gas Safe registered for domestic gas work, registration 568345, and an accredited Vaillant installer, so gas work is carried out by our Gas Safe registered engineers and finished to manufacturer standards.

More information

We cover boiler installations across Brighton, Hove, Woodingdean, Worthing, Lewes, Shoreham-by-Sea, Haywards Heath, Seaford and Burgess Hill, working in all kinds of homes from Victorian terraces to newer builds. Older properties often need a bit more thought around pipework and access, and we factor that into the quote rather than springing extra costs on you halfway through.

Properly sized, properly fitted, properly explained, that's the whole job as far as we're concerned.

Once the boiler's in, we walk you through the controls and what to expect, including when it needs its first service. If you're also thinking about a bathroom refit or general plumbing work alongside a new boiler, it's worth mentioning when you get in touch, since we can often plan both together. Either way, get in touch and we'll talk through what your home actually needs, not just what's easiest to sell.

Recent work

Sage green kitchen run with wood worktop, gas hob and a tall white column radiator on pink wall
Brighton ยท April 2026

Kitchen installation in central Brighton

A kitchen installation in central Brighton. We removed the existing kitchen, fitted a new Glow-worm boiler and relocated all of the plumbing and electrics before installing the new kitchen and fully renovating the space.

Ceramic butler sink and brushed steel mixer tap under a window in a cream kitchen with copper handles
Brighton ยท April 2026

Kitchen renovation in central Brighton

A kitchen upgrade in central Brighton. The existing kitchen and the chimney were removed and the walls damp proofed, before all new plumbing and electrics went in along with a Vaillant boiler. Stone worktops complete the new kitchen.

Vaillant ecoFIT pure boiler on a bare plaster wall with copper tails and brass magnetic filter
Woodingdean ยท October 2022

Emergency boiler replacement in Woodingdean

An emergency boiler swap carried out in Woodingdean, Brighton.

Plant room with a blue booster tank, Joule cylinder and a Vaillant boiler on the right
September 2022

Vaillant boiler and cylinder plant room installation

We installed this compact plant room as part of a full house refurbishment, centred on a Vaillant boiler with a low loss header, system pump and zone valves. It works alongside a Joule hot water cylinder and a booster set, with the wiring completed by an electrical contractor.

Bath with deck-mounted black taps and handset against a charcoal herringbone tiled wall
September 2022

Plumbing, heating and gas for a full house refurbishment

We completed all of the plumbing, heating and gas work on this full house refurbishment. The job took in a new Vaillant boiler and a full heating system, an upstairs bathroom and downstairs shower room, and all of the kitchen and utility plumbing.

Vaillant ecoFIT pure boiler above white metro tiling with an EPH wireless thermostat on the worktop
June 2022

Vaillant boiler installation

Another Vaillant boiler installation completed by our team.

โ€œFantastic experience all round, RK plumbing and heating installed a new valliant boiler and 7 radiators throughout my property. I could not fault them at all, incredibly knowledgeable, helpful, clean and tidy. The work was completed on time at the agreed price with zero hassle. I would recommend RK plumbing and heating and will look forward to using such a great company in the future. Thankyou Ryan and the team.โ€

B

Bradley Chaston

โ€œWonderful team.. Ryan, Jake, and Jonny are well organised team of plumbers, they communicated well throughout the process from quoting to installing my New Vaillant Boiler. Exceptionally clean, tidy workers and I would highly recommend RK Plumbing and Heating Southern Ltd.โ€

A

Amanda B

5.0 average from 7 reviews

Worth considering

Boilers

Boiler Conversion

Boiler conversions across Brighton, Hove and Sussex, from removing the old cylinder and tanks to fitting and commissioning your new combi boiler.

Boiler Conversionโ†’
Boilers

Back Boiler Replacement

Gas Safe back boiler removal and modern boiler installation, including pipework, flue work and making good the old fireplace, across Brighton & Hove and Sussex.

Back Boiler Replacementโ†’
Boilers

Boiler Relocation

Moving a domestic boiler to a better spot in Brighton, Hove and Sussex, with pipework and flue rerouted and the appliance recommissioned in place.

Boiler Relocationโ†’

Before you book

Straight answers to what people usually ask before getting a new boiler fitted.

How long does a boiler installation take?
Most straightforward replacements are done in a day, though jobs involving relocating the boiler or upgrading pipework can take longer. We'll give you a realistic timeframe after the survey.
Will I be without heating and hot water during the install?
Yes, for part of the day while the old boiler is disconnected and the new one is connected and commissioned. We aim to keep this window as short as possible and will tell you what to expect beforehand.
Are you qualified to install boilers?
We are Gas Safe registered for domestic gas work, registration 568345, and an accredited Vaillant installer. Gas work is carried out by our Gas Safe registered engineers, under registration 568345.
Do you only fit Vaillant boilers?
We're an accredited Vaillant installer, but we work with other reputable manufacturers too. We'll recommend what suits your home and budget rather than pushing one brand.
What's included in the price?
A quote covers the boiler, removal and disposal of the old unit, all connections, flushing, commissioning and testing. We'll go through exactly what's included before you commit to anything.
What happens before you hand the boiler over?
Every installation is flushed, pressurised, commissioned and safety checked before we hand it over, and we run through the controls with you so you know how everything works.
Do you cover my area?
We are based in Woodingdean and cover Brighton, Hove, Worthing, Lewes, Shoreham-by-Sea, Haywards Heath, Seaford, Burgess Hill and surrounding Sussex towns.
Can you fit a boiler alongside a bathroom refit?
Yes, this comes up often. If you're planning both, mention it when you get in touch and we can plan the work together to minimise disruption.

Let's talk about your boiler installation

Call us or send a message and we'll arrange a survey to find the right boiler for your home, with no pressure to decide on the spot.

Call 01273 911551