Darwen, Blackburn, Bolton, Rochdale, Oldham and around

Plumbing, heating and bathrooms, done properly.

Graham Johnson is a Gas Safe registered engineer and Vaillant Approved Installer based in Darwen. Boilers, full bathrooms and everyday plumbing, always with a detailed quote before any work starts.

A finished bathroom by Graham: fluted walnut vanity unit with a black countertop basin, oval LED mirror and dark marble-effect tilesA complete bathroom installation in Rishworth, finished with dark marble-effect wall panels and a glass shower screenA roll-top bath in a bathroom Graham moved into a different room of the houseA bathroom finished by Graham, with grey tiles, a roll-top bath, a blue vanity unit and a glass shower enclosure
Finished by GrahamFluted walnut vanity, LED mirror and marble-effect tiling.
A new Vaillant ecoTEC Pro 28 boiler fitted by Graham in a kitchen wall cupboard, with copper pipework and a magnetic system filter below Vaillant ecoTEC Pro,
fitted by Graham

Vaillant boilers. Only Vaillant.

Graham fits one make of boiler, and knows it inside out. He's a Vaillant Approved Installer, so a new boiler from him is fitted to the manufacturer's standard and backed by Vaillant.

  • Approved by VaillantTrained and approved on the range he installs, not a general fitter working from the manual.
  • One brand, known properlyFitting and servicing one make means quicker fault-finding and the right parts on the van.
  • Longer guaranteesApproved installers can offer extended manufacturer guarantees on new Vaillant boilers. Graham confirms the cover for your model when he quotes.
Ask about a new boiler

Bathrooms, from strip-out to handover.

Drag the slider to compare the room as Graham found it with the finished job. Pick another job to swap it in.

What customers say.

100% recommended on Facebook
At no point was I asked for additional money to cover x, y or z as the original quote had been so thorough.
Pauline H. Facebook review, June 2026

His work ethic, professionalism and attention to detail is 1st class.

Marc P. Facebook review

I cannot fault any aspect of Graham's work.

John B. Facebook review
Read all five reviews in full
Map of the area Graham coversA circle of about 20 miles around Darwen, taking in Blackburn, Bolton, Bury, Rochdale, Oldham, Accrington, Burnley, Chorley, Preston, Leyland, Wigan and Clitheroe.5 miles10 miles20 milesBlackburnBoltonBuryRochdaleOldhamAccringtonChorleyPrestonBurnleyRamsbottomRawtenstallHorwichWiganLeylandHeywoodClitheroeEdgworthDarwenN5 miles

Rings show straight-line distance from Darwen. Shaded areas are towns; copper lines are main roads and motorways. Map data: Natural Earth.

Based in Darwen, working up to 20 miles out.

Graham now covers a wider patch: east to Rochdale and Oldham, west to Preston and Wigan, and north to Clitheroe. Close to the edge? Ask anyway.

  • Darwen
  • Blackburn
  • Bolton
  • Bury
  • Rochdale
  • Oldham
  • Accrington
  • Burnley
  • Chorley
  • Preston
  • Leyland
  • Wigan
  • Horwich
  • Ramsbottom
  • Rossendale
  • Heywood
  • Clitheroe
  • Littleborough
  • Edgworth

Including the villages around Darwen: Hoddlesden, Belthorn, Lower Darwen, Feniscowles, Pleasington, Tockholes, Egerton and Turton.

Tell Graham about your job.

Ring, send a WhatsApp or fill in the short form. He'll get back to you to arrange a visit and a free, detailed quote.