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Our fittings are non-corrosive, which keeps the contaminants out and the "healthy air" in.The replacement cost of the materials used under a concrete slab can reach astronomical levels, if the problem can be repaired at all. General Plastics, Inc. has designed fittings and duct pipe that will outlast the house.The fittings can be glued and secured to our recommended heat and air duct pipe*, insuring an airtight, watertight system. So use the best plastic fittings and boxes, manufactured by General Plastics, Inc., designed to outlast the home and provide "healthy air."


General Plastics, Inc

3500 North Harrison,

Shawnee, OK 74804

Phone. 888-275-3171

Email. sales@general-plastics.com