I am the process of moving a natural gas BBQ since it is too close the wall. I turned off the gas and removed the pipe leading from the patio floor. Tracpipe (1/2") was used to bring gas to this point (under patio floor). When I removed the black pipe/valve etc from the Tracpipe fixture, the latter came apart. Question... can I just screw this self sealing joint on the end of the Tracpipe back together or does the it have to be replaced?