Abstract: A tube coupling (10) which includes a tubular, electrically conductive housing (11), a seal (12) for sealing against the outside of a tube, a substantially annular and electrically conductive grab ring (13) for gripping the outside of a tube and an annular cartridge ring (15) between an inner surface of the housing (11) and the grab ring (13). The cartridge ring (15) includes a projection (30) that projects radially inwardly and is positioned so that upon insertion of a tube into the tube coupling (10), an edge of the grab ring (13) bears against the projection (30) and the cartridge (15) bears against a facing surface of the housing (11) to provide electrically continuity between the grab ring (13) and the housing (11).

Abstract: A connection fitting (10) for a pipe, including a tubular body (12), an O-ring (14) mountable on outer side of tubular body (12), a substantially tubular collet (16) having a first end and a second end and having a memory, a substantially annular and resilient grab ring (20) for gripping the outer side of a pipe inserted into the collet (16), a substantially tubular spacer ring (22) locatable on the free side of the grab ring (20), a collet retainer (18), and a tubular protection ring (24) locatable within the spacer ring (22), wherein when the collet retainer (18) engages with the collet (16) and causes the collet (16) to lock onto the tubular body (12) apertures (66) in the collet retainer (18) permit portions of the protection ring (24) to be seen after connection of a pipe to the connection fitting (10) is completed.

Abstract: A connection fitting (10) for a pipe, including a tubular body (12), an O-ring (14) mountable on outer side of tubular body (12), a substantially tubular collet (16) having a first end and a second end and having a memory, a substantially annular and resilient grab ring (20) for gripping the outer side of a pipe inserted into the collet (16), a substantially tubular spacer ring (22) locatable on the free side of the grab ring (20), a collet retainer (18), and a tubular protection ring (24) locatable within the spacer ring (22), wherein when the collet retainer (18) engages with the collet (16) and causes the collet (16) to lock onto the tubular body (12) apertures (66) in the collet retainer (18) permit portions of the protection ring (24) to be seen after connection of a pipe to the connection fitting (10) is completed.

Abstract: A tube coupling (10) which includes a tubular, electrically conductive housing (11), a seal (12) for sealing against the outside of a tube, a substantially annular and electrically conductive grab ring (13) for gripping the outside of a tube and an annular cartridge ring (15) between an inner surface of the housing (11) and the grab ring (13). The cartridge ring (15) includes a projection (30) that projects radially inwardly and is positioned so that upon insertion of a tube into the tube coupling (10), an edge of the grab ring (13) bears against the projection (30) and the cartridge (15) bears against a facing surface of the housing (11) to provide electrically continuity between the grab ring (13) and the housing (11).

Abstract: A tool (10) for use with a cylindrical tube (12) and tube coupling (20), the tool (10) including a first abutment (25) for abutting a demount ring (18) of the tube coupling (20) and a second abutment (26) for abutting an end (27) of a tube (12). The second abutment (26) being spaced from a marking face (28), whereby the spacing between the second abutment (26) and the marking face (28) is equal to the required depth of insertion of a tube end (11) into the tube coupling (20).