Buried plastic sewage sump

A sewage grinder pump basin assembly comprising:

• a molded plastic sewage sump, said sump being an integrally molded basin having a dry well area and a wet well area below the dry well and separated from it by a floor in the dry well, said floor having an opening over which a lid is removably seated, a grinder pump located in the wet well area for grinding sewage and pumping it out through a discharge pipe, and a lid removably attached to the sump covering the dry well area,
• said dry well area containing equipment comprising an electrical junction box, a remote shut-off control for a valve controlling sewage output from the basin, and a level sensor,
• said dry well area having a shallow depth limited to that depth necessary to house the equipment, the opening in the dry well floor providing access to the wet well area below;
• said wet well area containing a C-channel rail extending downwards from the dry well floor to the bottom of the wet well, a plumbing tree connected at a first end to the grinder pump and at a second end to a quick-disconnect fitting located in the C-channel rail, said grinder pump being located near the bottom of the wet well area;
• said molded plastic sump further comprising a drop inlet molded into the wet well area of the sump as an outward projection of a side wall of the wet well, said drop inlet comprising a substantially horizontal outward projection from a side wall of the sump, said horizontal projection having an inlet opening provided for sewage inlet from above, said drop inlet further comprising a bottom wall shaped for directing inlet sewage dropped through the inlet opening directly to the grinder pump in the bottom of the wet well, said molded drop inlet being connectible from directions ranging to over 180.degree. with respect to the drop inlet opening.