Patent ID: 6467815
Filing Date: 2002-10-22
Classification: F16L

Abstract:
A fitting for installation of a nipple from the exterior of a duct to provide a seal from the interior of said duct, said duct having a wall with an aperture therein for receiving a nipple, said fitting comprising:a nipple installation member comprising a hollow, externally threaded nipple portion, a flange disposed on one end thereof and dimensioned so as to pass through said aperture, and an elongated handling stem extending from the other end of the nipple portion, wherein said nipple portion, said flange and said elongated handling stem comprise a single plastic molding, a flexible cup seal washer having an outer dimension greater than that of the aperture and adapted to cooperate with the flange to seal the nipple portion in the aperture from the interior of said duct, said washer being sufficiently flexible and so dimensioned to enable passage over the elongated handling stem and through the aperture, and a nut with threads matching the externally threaded nipple portion, whereby the nipple portion may be installed from the exterior of the duct and the elongated handling stem removed to provide a sealed nipple.