MFM Building Products, founded in 1961 by Robert E. Simpson, offers the construction industry more than 57 years of knowledge and expertise in the manufacture of waterproofing and weather barrier products. From humble beginnings, this family-owned manufacturing company has continued to grow and foster new product development, improved product performance, and help reduce overall costs with a value-based philosophy.

We are one of the worlds largest manufacturer of vinyl plumbing, producing whole-house plumbing pipe and fittings from the well or water line to the sewer or septic system. We have multiple manufacturing and distribution facilities across the nation along with an award-winning truck fleet to efficiently distribute our American-made products. Providing durable, expertly crafted PVC products that last a lifetime since 1962.