Welcome to Mark D. Gray Limited, Gas and Central Heating Services. Established in 1991, and with over 27 years experience in the gas and heating industry, Mark D. Gray Limited are a reputable gas and heating company that are based in East Kilbride and cover all areas in and around Glasgow. Mark D Gray Limited are a company who pride themselves in customer service, in-turn generating over 80% of installations through recommendation from previous clients.Mark D. Gray Limited, Gas and Central Heating Services are a company who have a proud association working with Baxi and Potterton heating products, from installation through to servicing and repairs.Mark D. Gray Limited specialises in fault finding and repair work of all Baxi and Potterton appliances and stock over 300 genuine Baxi and Potterton spare parts. This means that should you experience a problem with your Baxi or Potterton boiler we can usually repair it on our first visit.