Multi Fittings produces the widest range of injection-molded fittingd for pressurized water mains and sewer forcements, gravity flow sewers and drain wastle and vent applications across the United States. Multi Fittings produces the widest range of injection-molded fittingd for pressurized water mains and sewer forcements, gravity flow sewers and drain wastle and vent applications across the United States. Multi Fittings produces the widest range of injection-molded fittingd for pressurized water mains and sewer forcements, gravity flow sewers and drain wastle and vent applications across the United States. Multi Fittings produces the widest range of injection-molded fittingd for pressurized water mains and sewer forcements, gravity flow sewers and drain wastle and vent applications across the United States.