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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    New Boiler

    We had an ancient boiler which failed. Got a couple of quotes but choose Graham’s company for the work. He came to see the situation and gave knowledgable advice on replacement boilers. Excellent work, excellent team and a great job done for us. Deserves... View More

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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 8.30am – 4.30pm

    Tuesday 8.30am – 4.30pm

    Wednesday 8.30am – 4.30pm

    Thursday 8.30am – 4.30pm

    Friday 8.30am – 3.00pm

    Saturday Closed

    Sunday Closed

    Graham Wallace Heating and Plumbing
    Average rating:  
     15 reviews
     by Ken Murray
    Oil to gas conversion

    Graham and his superb team carried out our oil to gas conversion in one day. We are absolutely delighted with our new gas heating system.

     by Eddie and Isobel
    Oil to gas

    Graham and team did an excellent job being pensioners we were a bit concerned but needed not to be because he explained everything very clearly and would highly recommend him

     by Rosemary Campbell

    Graham & his team converted the Econ 7 Heating in my 3rd Floor Apt to Gas. Graham was very professional & punctual at all times & he explained everything thoroughly to me before the work was started. The job was completed with no hassle & the team tidied up when the job was finished. This major job was completed in just over 2 days - which I was delighted with! Cannot recommend Graham & his team highly enough. Great service. Thank you Graham.😊

     by Gloria Aicken
    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

     by Clare
    Great work

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

     by Natalie Brady
    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

     by Anita Mcauley
    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 job
    Thank you again

     by Kerry Marsden
    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

     by Julie Armstrong
    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

     by Drew Patton
    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

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