About McMillan Sales

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Welcome to McMillan Sales Plumbing & Heating Supplies!

McMillan Sales is a Colorado plumbing and heating supply wholesaler, serving our communities since 1960. We carry commercial and residential boilers and water heaters, instantaneous water heaters, pumps, kitchen & bath faucets, shower systems, whirlpools, sinks, lavatories, toilets, a varitety of tools and much more.

The McMillan difference isn’t just what we sell, but how we sell it: by focusing on what you need in product availability and what you want in customer service. Our sales team asks the right questions to ensure you get the correct parts.

Many of our sales team members have been in the Colorado and Rocky Mountain Region plumbing supply business for decades. Your account rep and the parts counter team at McMillan Sales include people like a guy who first started learning the heating trade before he could drive, assisting his old man to install boilers and water heaters for his plumbing and heating family business.

We even have one staff member who was a Master Plumber for one of the biggest plumbing and heating mechanical outfits in town. We’ve worked with them all, and some of us have actually worked within Colorado’s local plumbing and heating companies, both big and small in scale. We are scalable to your needs, and we work both hard and smart to get you what the job demands.

Our focus is solving your plumbing needs with what you want and what the job demands. We can also probably introduce you to a product or two. Over the decades we’ve premiered new-to-Colorado brands, as well as brought in the manufacturers to provide training on the lastest innovations from plumbing and/or heating brands you’ve trusted and installed your entire career. We have your back.

We have 68,000 sq.ft. in our on-site distribution warehouse, conveniently located on Interstate 70 (Exit #277), and we have a delivery fleet with reliable drivers. Ask about our custom warehousing programs, product training by manufacturer representatives and what we can do for your specific plumbing and heating supply needs.



SAT: 7AM-10:30AM


4801 E. 46th Ave.

Denver, CO 80216


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Phone: 303-399-8500


Fax: 303-399-8501