The Harrington Corporation (HARCO) was founded in 1966 in Lynchburg, Virginia, to produce push-on joint ductile iron fittings.
HARCO was the first manufacturer in the United States to produce injection molded gasketed PVC fittings for SDR-26 and SDR-21 pipe, injection molded gasketed PVC fittings for SDR-35 sewer pipe and injection molded gasketed PVC fittings for C900 PVC pipe.
1970 - Introduced gasketed PVC fittings for IPS-PVC pipe
1977 - Developed the first compact ductile iron mechanical joint fittings (AWWA C153)
1977 - Introduced gasketed PVC fittings for sewer pipe
1982 - Introduced gasketed PVC fittings for C900 pipe
1984 - Acquired DICOA and gasketed DI fittings for IPS-PVC pipe
1990 - Introduced modular connection system for DI fittings
1991 - Acquired Flo Control IPS-PVC and Sewer product lines
1997 - Added PVC fabrication capabilities
2007 - Introduced Turf Irrigation Valves and HDPE product line
2009 - Acquired Freedom Plastics PVC fabrication in Janesville, WI
2010 - Added Philmac PP Compression Fittings representation in USA
2011 - Added molded HDPE fittings
2015 - Added molded PVC PIP fittings for Agricultural Market