Plumbing & heating across Sussex, done properly.
I’m Josh. I’ve been on the tools for over 15 years, and since 2018 I’ve run J Dunne Plumbing & Heating from Haywards Heath. New boilers, repairs, servicing and bathrooms, all done to the standard I’d want in my own home.
Vaillant ecoTEC boiler
Pump & zone valves
Unvented cylinder
Copper, clipped & level

“Josh was tidy and efficient and considerate of our personal circumstances.”

Everything with a pipe or a flame.
From a dripping tap to a full boiler and cylinder installation, one accredited engineer does the whole job, start to finish.
Where’s the problem? Tap the house.
Every part of your heating and plumbing in one picture. Tap a number to see the common problems, what to look out for, and how Josh can help.
The boiler
The heart of the system. If it’s over 12 years old, needs regular repairs or shows fault codes, it may be time for a new one. If not, a yearly service keeps it safe and under warranty.
Hot water cylinder
System and regular boilers store hot water in a cylinder. An unvented cylinder gives mains-pressure showers, which is ideal if you have more than one bathroom.
Radiators
Cold at the bottom, warm at the top? That’s sludge. Cold at the top? That’s air. Josh fits, moves and balances radiators, and flushes systems when it’s actually needed.
Bathroom
Weak shower, leaking bath or a tired room? Josh designs around your water system so the shower you choose actually performs.
Thermostat
Swap an old dial or timer for smart controls and heat only the rooms you use, when you use them. You can control it all from your phone.
Underfloor heating
Warmth from the floor up, with no radiators on the walls. It’s perfect for extensions, kitchens and bathrooms, and works with your boiler.
Kitchen & gas hob
Sinks, taps, dishwashers and gas hobs. Gas appliances must be fitted by a Gas Safe engineer, and Josh is registered (No. 623048).
Loft tanks
Tanks in the loft usually mean an older regular system. Converting to a combi frees up the loft and the airing cupboard.
Condensate pipe
In a cold snap, this small outside pipe can freeze and lock out your boiler. Pour warm (not boiling) water over it, then reset the boiler.
Your new boiler, priced in 60 seconds.
Answer five quick questions. You’ll see the boiler Josh would likely recommend, Vaillant and Glow-worm options side by side, the warranty, and a guide price. No email address needed.
- Sized to your home, not oversold
- Includes the system clean, filter, flue and certification
- A free survey confirms a fixed price

I’d rather do one job properly than three in a rush.
Josh Dunne, founderOne name on the van, and on the work.
Josh started his apprenticeship straight from school, and he’s spent more than 15 years learning the trade properly. When you call J Dunne, you speak to the engineer who turns up, quotes the job and stands behind it afterwards.
Boiler flashing a code? Find out what it means.
Choose your boiler make, type the code, and get a plain-English explanation. You’ll see what’s safe to check yourself, and when to stop and call.
Straightforward, from the first call.
- 01
Call or get a quote
Ring Josh, send a text, or use the instant boiler quote to get a guide price in a minute.
- 02
A free visit
Josh comes out, looks at your system and listens to what you need. There’s no charge and no hard sell.
- 03
A fixed price
You get a clear written quote with no hidden extras, and a date that suits you.
- 04
Done properly
Dust sheets down, a tidy installation, everything tested and explained, and a reminder when your next service is due.
What customers say about Josh.
Tidy, efficient and considerate: those are the words customers use. You can read more on Checkatrade.
“I was pleased with the way the work was carried out, with the minimum of fuss. Josh was tidy and efficient and considerate of our personal circumstances in this challenging time.”
“The work carried out was excellent. Josh was very professional and polite. I was very pleased with the results.”

Josh is listed on Checkatrade, so you can see every review in one place, written by real customers.
Read all reviewsBased in Haywards Heath. Covering Mid Sussex.
Most of Josh’s work is within half an hour of Haywards Heath: up to Crawley and East Grinstead, across to Horsham, and down to Lewes and the coast.
Which areas do you cover?
Josh is based in Haywards Heath and covers Mid Sussex and the surrounding towns, including Burgess Hill, Lindfield, Cuckfield, Hassocks, Crawley, East Grinstead, Horsham, Lewes, Uckfield and Brighton.
Are you Gas Safe registered?
Yes. J Dunne Plumbing & Heating is Gas Safe registered under number 623048. You can check any engineer’s registration on the Gas Safe Register website.
Do you give free estimates?
Yes. Estimates and advice are free. For bigger jobs like a new boiler or a bathroom, Josh visits, looks at what you have and gives you a fixed written quote.
Who will actually do the work?
Josh, the person you speak to on the phone. You won’t be passed to a call centre or a subcontractor you’ve never met.
Do you work on all boiler makes?
Yes. Josh services and repairs all the major makes. For new boilers, he installs Vaillant and Glow-worm as an accredited installer, which means longer warranties for you.
Let’s get your heating sorted.
Call Josh for anything urgent, text a photo of the problem, or get a boiler price online in a minute.


