Tapped no-hub coupling

摘要

A “tee” coupling for use with a no-hub cast iron “P-trap”; the tee is directionally rotatable on the a step engaging the standpipe end of the trap. Two interchangeable gasketed ends are provided for securing the coupling in line with the trap. A rigid band for reinforcing the tee fitting is embedded in the walls of the coupling between the two gasketed ends and the coupling is reinforced with an external metal sheath. Paired pipe clamps on each end of the coupling are tightened around the sheath to seal the gaskets to the pipe ends after the “tee” is “aimed” in the desired direction for laying the primer line.

主权项

1. A tapped plumbing coupling and P-trap combination, which comprises:
a) a no-hub P-trap, wherein said P-trap is defined by a tubular “U” shaped body, a pipe wall, vertical and horizontal pipe ends, and an outside diameter at said ends, wherein the pipe wall is not perforated by a primer line connection adaptor; b) a no-hub coupling with directable primer line tee adaptor, wherein said coupling comprises:
i) a straight pipe union having a tubular body;ii) an elastomeric gasket sleeve liner extending from a first end to a second end of said tubular body; said body with circumferential inside wall and two ends, wherein the circumferential inside wall defines a center channel with centerline axis, said center channel having a first opening at said first end for receiving said vertical pipe end of said P-trap and a second pipe-receiving opening at said second end; and further wherein said sleeve liner defines a first internal circumferential step recessed from and facing said first end and a second internal circumferential step recessed from and facing said second end; each said step being configured to rigidly engage and seat a pipe butt end when received and seated thereon;iii) a rigid band embedded within said gasket sleeve liner of said tubular body between said first internal circumferential step and said second internal circumferential step, said rigid band having a diameter, a wall having a thickness, and butt ends, wherein said rigid band is circumferentially and medially disposed in the tubular body around the center channel and each said butt ends of said rigid band are configured to support a pipe butt end seated on said steps of said elastomeric gasket sleeve liner;iv) a tap hole extending radially through said tubular body and said rigid band;v) an external sheath that forms a wrappable outside sleeve on said tubular body;vi) wherein said tee adaptor is configured with a fluid connection between said center channel through said tap hole to an external primer line and is supported on said rigid band by a rigid connection thereto; and, further wherein said straight pipe union is configured to receive said vertical pipe end of said P-trap in said first end of said tubular body, and to be axially rotated thereon so as to aim said tee adaptor in any direction around the centerline axis while supported on said internal circumferential step, before rigidly and tightenedly being sealed thereonto by ring clamps mounted circumferentially around each end of said external sheath.