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 theCustom 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.

Complete engineering and production expertise resulting in high quality, thermoplastic parts to meet your needs.

Primary processes include Injection Molding, Assembly and Fabrication through value added/value engineered operations.

Materials Molded: PVC, CPVC, ABS, Acetel, Noryl, Nylon 6, Nylon, Acrylic, Polypropylene, Polyethylene, HDPE, High Density Polystyrene, Polycarbonate, Minlon, Celcon, Santoprene, Rynite, Uniprene, Flexible PVC, Delrin, Polyester, Glass Filled Materials, and related thermoplastic polymers

Production Injection Molding

Insert Molding, Painting, Pad-printing, Decorating

Secondary operations, including Sub-assembly, CNC mill and lathe capabilities, drilling and tapping

New tooling; Tooling improvements

Ultrasonic Welding

Prototyping - concept to production
Quality parts, on time, at a competitive price.