Abstract: A pipe union for interconnecting a first length and a second length of pipe, may include a first annular pipe member attachable to the first length of pipe. The first annular pipe member may have threading means formed on an inner surface of the first annular pipe member. The pipe union may also include a second annular pipe member attachable to the second length of pipe. The second annular pipe member may have threading means formed on an outer surface, which may be adapted to engage the threading means on the inner surface of the first annular pipe member. The pipe union may also include a third annular pipe member disposed between the first and second annular pipe members. The threading means on the inner surface of the first pipe member may engage threading means on an outer surface of the first length of pipe.

Abstract: A pipe union with extension for interconnecting a first length and a second length of coaxial pipe may include a first annular pipe member attachable to the first length of pipe. The first annular pipe member may incorporate a circumferential flange having a shoulder. The first annular pipe member may comprise a front face which faces the first length of pipe, and a rear face which faces in a direction of the second length of pipe. The pipe union may also comprise a fastening member incorporating an inwardly extending flange with a central passageway adapted to fit around the first annular pipe member. The inwardly extending flange may be adapted to abut the shoulder as the fastening member is fitted over the first annular pipe member. The fastening member may comprise thread means formed on an inner surface of the fastening member.

Abstract: A pipe union with extension is disclosed herein, for interconnecting a first length and a second length of coaxial pipe. The pipe union may comprise a first annular pipe member attachable to the first length of pipe. The first annular pipe member may incorporate a circumferential flange having a shoulder. The first annular pipe member may comprise a front face which faces the first length of pipe, and a rear face which faces in a direction of the second length of pipe. The pipe union may also comprise a fastening member incorporating an inwardly extending flange with a central passageway adapted to fit around the first annular pipe member. The inwardly extending flange may be adapted to abut the shoulder as the fastening member is fitted over the first annular pipe member. The fastening member may comprise thread means formed on an inner surface of the fastening member.