Abstract: A fitting for conduit comprising a body and an acceptor. The body has a wall and a throughbore. The acceptor is disposed along the wall and is capable of providing a sealing interface between the throughbore and the conduit. In one embodiment, the acceptor of the fitting receives a portion of at least one wall of a conduit, and a sealing interface is provided between the throughbore of the body of the fitting and a flow passage of the conduit to form a containment system. In another embodiment, the throughbore is capable of allowing a primary conduit and a flow passage of a secondary conduit to communicate therethrough. According to this embodiment, the acceptor receives a portion of a wall of the secondary conduit and a sealing interface is provide between the throughbore and the flow passage of the secondary conduit to form a secondary containment system.