ABS manhole adapter serving as a coupling-collar of a resilient connector assembly used in making a connection between a precast reinforced concrete manhole and a PVC sewer pipe

摘要

When a PVC sewer pipe is to be connected to a precast reinforced concrete manhole at a designated hole location thereof, this designated hole is made large enough to later accommodate grout and an inserted end of the PVC sewer pipe, on which an ABS manhole adapter is pre-positioned. This ABS manhole adapter serves as a coupling-collar, around which the grout is placed, as the grout is used to fill the remaining volume of the designated hole, thereby completing the resilient connector assembly used in making this connection between the precast reinforced concrete manhole and the PVC sewer pipe. This ABS manhole adapter has a cylindrical body having: an outside diameter surface structure, in turn having multiple adjacent rib-grooves formed therein to receive portions of grout; and also in turn having a longitudinal passageway structure to receive ground water unless a well-nut assembly thereof has the sealing nut in place; an inside diameter surface structure, in turn having a rib-groove to receive a circular continuous resilient seal to bear against a PVC sewer pipe; and such a resilient seal is so positioned in this rib-groove.