The present invention is connected to pipe it loses the pressing force of the sealing ring to the watertight effect when the contracted or relaxed by the temperature change of the seasons pushed or, in the connector socket pipe by more than the high pressure is generated is connected to the socket pipe inside the pipeline leak relates to a tube protection connection departure for apryun assembly able to prevent the phenomenon, sealing ring 115 to the sewer section 111 of socket tube 110 is placed, a connector 120, the sealing ring ( through 115) it is fitted to the cue ball 111 in the socket pipe (110), sewer part (111 of the KP volts (the lower engagement portion 141, the socket pipe (110 of 140)) mounted on apryun 130) in caught in flange 112 formed in the state, by tightening a nut 145 fastened to KP bolt 140, by pressing the inner ring part 131 is sealing ring 115 at the bottom of apryun 130, a sealing ring ( 115) avoidance for the socket pipe (pipe is sealed through the sewer section 111 and the connector 120 of 110) connected in apryun assembly, the Connector 120 has an inner ring 131 and outer ring 132 is formed with a locking projection 122 on the outer circumferential surface of the connection end 121, the apryun 130 is connected by a horizontal portion 133, a horizontal 133 a plurality of secondary housing 150 is formed at regular intervals on the opening (151) to the auxiliary housing 150 is formed toward the center of the apryun, a stopper block (160 in the interior of the auxiliary housing 150 ) and milpin 170 is disposed, the stopper block 160 is mounted on milpin 170, a top bolt of the bolt hole 153, the top milpin 170 formed in the top surface 152 of the auxiliary housing 150 part 173 is extended and, by being a nut 174 is fastened to the protruding upper bolt portion 173, pawls 162 of the tightening stopper block 160, the nut 145 of the KP bolt 140, the auxiliary in the state it protruded from the opening 151 of the housing 150, tightening the nut 174 of milpin 170, the opening 151 of the locking step 162 of the stopper block 160, the auxiliary housing 150 which projects more The features.