Abstract: A grooved joint adapter includes a cylindrical body having an insertion port formed in one end, a groove formed in an outer peripheral surface of the other end, a guide portion formed on an interior thereof, first coupling portions on both outer surfaces thereof, and a fixing portion protruding from an inner peripheral surface thereof. A pipe socket has second coupling portions on both outer surfaces and a protrusion formed on one surface. A pressure ring is disposed on an insertion port side and has both ends separated from each other. A stopper ring is disposed inside of the guide portion, and has both ends separated from each other and one or more wedge sawteeth on an inner peripheral surface. A rubber ring is disposed inside of the cylindrical body, and has an uneven portion on an inner peripheral surface and a stopper portion protruding inward.

Abstract: A grooved joint adapter includes a cylindrical body having an insertion port formed in one end, a groove formed in an outer peripheral surface of the other end, a guide portion formed on an interior thereof, first coupling portions on both outer surfaces thereof, and a fixing portion protruding from an inner peripheral surface thereof. A pipe socket has second coupling portions on both outer surfaces and a protrusion formed on one surface. A pressure ring is disposed on an insertion port side and has both ends separated from each other. A stopper ring is disposed inside of the guide portion, and has both ends separated from each other and one or more wedge sawteeth on an inner peripheral surface. A rubber ring is disposed inside of the cylindrical body, and has an uneven portion on an inner peripheral surface and a stopper portion protruding inward.