Patent ID: 7770333

Claim:
An adapter for use on a lid of a tank of an on-site waste treatment or drainage system, comprising: a bottom having an upper surface and a lower surface and defining a central opening, the lower surface generally defining a first plane and adapted to abut a planar surface on the lid of the tank, the upper surface generally defining a second plane; one or more upwardly extending, downwardly open channels formed in the bottom and operable to receive adhesive, the channels extending into the bottom from the first plane and terminating between the first plane and the second plane; an inner wall extending upward of the upper surface and surrounding the opening; an outer wall extending upward of the upper surface; and one or more reinforcement struts extending from the inner wall to at least one of the outer wall and the upper surface of the bottom, wherein each of the one or more channels is between an innermost surface of the inner wall and an outermost surface of the outer wall.