Adapter for a flue gas outlet with a first end (2), a second end (4), and a central passageway (6) extending there between. The second end (4) has at least two interconnected cylinder shaped walls (8, 10, 12) having different internal diameters (d1, d2, d3), each cylinder shaped wall (8,10,12) being arranged for sealed engagement with a corresponding pipe to be inserted into the adapter (1). An internal diameter of the at least two cylinder shaped walls (8,10,12) decreases with increased insertion depth (h) as measured from the second end (4) toward the first end (2). The at least two cylinder shaped walls (8,10,12) are eccentrically disposed and mutually tangent in a longitudinal direction of the adapter (1). The adapter (1) further has a pipe securing member (14) circumferentially disposed at the second end (4).

A roof vent capping device that is configured to sealably secured to an opening of a roof vent pipe so as to facilitate a pressure test of a plumbing network. The present invention is configured to be removed from the roof vent pipe from a distal location ensuing the pressure test. The roof vent capping device includes a cap member wherein the cap member has an upper portion and a lower portion. The lower portion has a diameter configured to be inserted into the opening of a roof vent pipe and provide a hermetic seal. A securing member is superposed over the cap member and includes end members that are configured to releasably secure to the roof vent pipe. A pull member is operably coupled to the securing member and the cap member and includes a second end distally located from the roof vent pipe.

A roof vent capping device that is configured to sealably secured to an opening of a roof vent pipe so as to facilitate a pressure test of a plumbing network. The present invention is configured to be removed from the roof vent pipe from a distal location ensuing the pressure test. The roof vent capping device includes a cap member wherein the cap member has an upper portion and a lower portion. The lower portion has a diameter configured to be inserted into the opening of a roof vent pipe and provide a hermetic seal. A securing member is superposed over the cap member and includes end members that are configured to releasably secure to the roof vent pipe. A pull member is operably coupled to the securing member and the cap member and includes a second end distally located from the roof vent pipe.