Graham Wallace Plumbing and Heating Ltd is a Belfast based company which aims to deliver the highest standard of workmanship at a price you can afford.
0% Finance on all New Gas Installations

Phone Now: 07878548460 (for future appointments only)

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Oil to Gas Conversion

Your current oil fired central heating system may be costing you money!

Some boilers are running at 60% efficiency or less – with gas you could be saving up to 40% efficiency!





Your oil usage (£)

Contact Graham Now!

Radiators and Sinks

Plumbing and Heating

Professional and Safe

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Underfloor Heating

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Range install

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Oil to Gas Conversions

Heating Installations

Professional Advice

Free Survey

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Get a Call out

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Boiler Service

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Graham and his team carried out my oil to gas conversion just before lockdown in early March. They did an excellent job. Very reliable and hassle free and all work carried out for a very fair price.I would highly recommend Graham and his team.

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Other Services

Leaks and repairs
Toilet fitting
Phoenix Gas installation
Wet rooms installation
High efficiency boilers
Water tanks service
Sink units install

Other Services

Oil to gas conversion
Boiler service and replacement
Underfloor heating
Range installation and service
Home visits
Bathroom fitting
Power Flushing
All domestic work


Expert and Trustworthy Gas and Heating Engineer – A PLUMBER YOU CAN TRUST, AT A PRICE YOU CAN AFFORD
Are you looking for a local plumber you can trust? Graham Wallace Plumbing and Heating Ltd is a Belfast based company which aims to deliver the highest standard of workmanship at a price you can afford.

For a quotation for:

  • Gas and oil heating installation
  • Conversions from oil to gas
  • Boiler servicing and replacement
  • Bathroom fitting
  • Power flushing
  • All domestic work

Contact Graham on 07878 548460 (m) or email

Opening Hours

Monday 8am – 4.30pm

Tuesday 8am – 4.30pm

Wednesday 8am – 4.30pm

Thursday 8am – 4.30pm

Friday 8am – 3.30pm

Saturday Closed

Sunday Closed

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Average rating:  
 12 reviews
Excellent first class service

What can i say, Graham Wallace and his team saved us in this extreme current situation. We were without heat and hot water in the run up to this Covid-19 lockdown. Graham turned our disappointment into magic by managing to turn our gas conversion around in one day. Outstanding workmanship, friendly and clean professional service. Thank you to you all from the bottom of our hearts. Stay safe eveyone and i hope we all come out stronger once this has passed. Do not by pass Graham Wallace Plumbing & Heating Ltd, trust me you will not be disappointed. 26/03/2020

Great work

After phoning and waiting in for several missed appointmentsfrom other companies I was delighted with the work carried outby Graham and his trades men.Both jobs where done on the day and time as arranged.Neat clean professional service.many thanks.

Wholly Recommended!

Graham and team converted my old economy 7 heating to fully functioning central heating with a gas boiler. Graham's team were punctual, professional and tidy!! I have no problem recommending Graham for any central heating or plumbing contracts and will certainly be using his services again in the future!Natalie Brady, Ards, 4/4/19

Great job!

The communication with Graham was outstanding considering how many people always tell you they will call you but they never actually do! The team has done an excellent job and we would highly recommend them! Defs going to use them for any plumbing jobThank you again

Outstanding service

Impeccable professionalism and expertise, lovely friendly service from Graham and team in trying circumstances!! They will be the only team we will recommend and use in the future. Thank you so much!  Kerry Marsden, Belfast

Very happy customer

Excellent service from start to finish. Prompt communication, very well coordinated service and very affordable. The team were excellent and all really professional and friendly. Left the house spotless after a very efficient job. Total gas install with extras in 1.5 days. Just in time for winter coming I am delighted to have a lovely warm house and heating I can rely on. I am also very confident with regards to after sales service and advice. Would be very happy to recommend!  Julie Armstrong, Bangor

Time for a change

Just converted from oil fired heating over to gas and selected Graham Wallace to do the job based on personal recommendations. First rate job executed by a superb crew. Job done in a day and a half. The banter flowed freely and the craic was mighty. They even lifted carpets to re-pipe 4 existing rads, re-laid carpets and helped put furniture back. Very happy customer indeed. I have no hesitation in adding to the recommendations.  Drew Patton, Belfast

gas conversion

graham and his team installed our gas in the time that they suggested
two days,great job great team very clean and tidy would recommend
them to anyone.

Professional and reliable

I have just converted my home from oil to a natural gas heating system. Having received numerous estimates and engineers call, I had no hesitation in giving Graham the contract. He explains what work is necessary, and also what is unnecessary. He is honest, reliable and ensures the work is carried out professionally and meets all safety standards. I have no hesitation in recommending Graham and his dedicated team.
Mr & Mrs Cumiskey, Belfast, 03/18

Gas Conversion

Great team, excellent work, happily recommend them to anyone.
Mr J Grahame, Carrickfergus, 31/01/18

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