Since 1962 Marks Supply has been supplying top-quality Plumbing, P.V.F., Hydronics and HVAC products to our customers with a level of service recognized throughout the industry as exceptional. With nine wholesale branches and three luxury showrooms located throughout south-western Ontario our success is directly linked to our conviction to provide this level of customer service; to maintain a highly educated, knowledgeable team of employees; and to embrace new, innovative technology.