Abstract: A tubing connector having two couplings, each coupling including a central stub tube and a spaced, concentric housing. Each coupling is adapted to be placed on a tubing end with each stub tube in fluid communication therewith. The couplings join to form the connector while the stub tubes telescopically mate to provide fluid communication through the connector and the housings telescopically mate to isolate the mated stub tubes in a spaced enclosure. Each coupling is provided with a closure which includes a cap and a stopper. The stopper seals the stub tube while the cap telescopically mates with the housing to isolate the sealed stub tube in a spaced enclosure. The closures are dimensionally configurated to mate while the couplings are mated to form the connector.