Transform your kitchen or bath space with our diverse collection of high-quality fixtures, faucets, sinks, shower systems, tubs, accessories and more.
Our Team is committed to providing top-notch service and expert advice, ensuring you have access to the complete resource for all your plumbing needs.
We offer a high-quality range of residential & commercial HVAC equipment, parts, and supplies, backed by years of experience, making us the ideal distributor for contractors.
Our warehouses are well-stocked with plastic, steel, copper and iron pipe, regulating valves to control fluid and gas flow, and a complete array of connective fittings.
Whether you need energy-efficient tankless systems or dependable traditional tanks and water heaters, we have your hot water needs covered.
McDonald Supply is a division of Hajoca Corporation, the nation’s largest privately held wholesale distributor of Plumbing, Heating, and Industrial supplies. Together we have 300 years of combined service, integrity, and reliability in the wholesale plumbing and heating industry. We are committed to serve you by having a well-trained and experienced staff to offer a full range of solutions to your plumbing system and heating/air conditioning needs.
Preferred by the Pros.We are so highly regarded because we know the industry. We are owned and operated by a plumbing, heating and industrial supply company that has been in business since 1858. Since 2006, Mainline has constantly innovated and adapted to market demand to introduce thousands of exceptionally valued, superior quality products. Every product undergoes rigorous testing and must meet stringent standards to bear the Mainline name.
