© Colonial Engineering

About Colonial Engineering
Since 1972, Colonial Engineering, Inc. has manufactured and marketed thermoplastic pipe fittings, valves, and piping components to wholesalers in the industrial PVF, process piping, water treatment, pool/spa, commercial plumbing, and irrigation markets.

Colonial entered the Custom Injection Molding business in 1985, building on the expertise gained from molding proprietary products in the valve and pipe fitting market. Our experience working with CPVC, PVC, PP, ABS, HDPE, Noryl, and other materials enables us to work with a variety of industries.  In addition to injection molding, we perform secondary CNC machining operations, hot stamp and pad print, and sub-assembly.

The Colonial Valve line has answered the need for reliable flow control for over 30 years. Our offering includes corrosion resistant Ball Valves, Check Valves, Butterfly Valves, Y-Line Strainers, and Unions.

For more details on these and other products offered by Colonial, click here.

6400 Corporate Ave Portage, MI 49002

Customer Service (toll-free):


National order fax (toll-free):

866-879-5982 or 269-323-0630 (local fax)