Abstract: A concrete liquid storage tank is supported by only three support points which rest upon a slab in permanent installation, which prevents twist forces being applied to the concrete shell of the tank in the event of vertical differential movement of portions of the slab under the support points, which prevents cracking of the concrete shell and leakage of contents to the environment.

Abstract: An adjustable weir for use in a liquid distribution system utilizes a weir plate having a weir opening whose height can be adjusted vertically. The weir plate is mounted to the end of a fluid distribution outlet in a manner which will maintain its proper orientation while allowing its vertical position with respect to the outlet opening to be varied.

Abstract: A housing designed to be anchored in concrete includes a handle and a pivot for moving the handle between an upstanding position and a generally recessed position with respect to the top of the housing. The pivot may extend from the housing for anchoring the housing in the concrete.

Abstract: A plastic fluid distribution box for installation in a subterranean system for waste water transport includes a first wall having an opening in the wall, and an elastomeric seal mounted in the opening and including a second wall. The second wall is permanently and sealingly attached to the first wall adjacent to and around the opening. The elastomeric seal includes a third planar wall having an annular separation ring defining a second opening dimensioned to provide a watertight fit on a pipe of predetermined dimension. Walls connecting the third planar wall to the second wall are angled with respect to the planar wall by an angle selected from the group of angles consisting of generally 90 degrees and generally 180 degrees.

Abstract: A cylindrical housing anchored in the opening of a concrete wall has a first cylindrical wall of generally uniform diameter attached to the inner side of the cylindrical housing and extending axially into the housing, a second generally radial annular wall has a radially outward side attached to the first wall and seals against a pipe through the cylindrical housing.

Abstract: A downward facing cavity is mounted directly below a vertical outlet pipe in a septic tank to collect particulate matter in the cavity.

Abstract: A cylindrical housing anchored in the opening of a concrete wall has a first cylindrical wall of generally uniform diameter attached to the inner side of the cylindrical housing and extending axially into the housing, a second generally radial annular wall has a radially outward side attached to the first wall and seals against a pipe through the cylindrical housing.

Abstract: A concrete cover for a subterranean construction includes a cast-in plastic handle which holds a piece of rebar in the cover and removably holds a piece of rebar externally of the cover.

Abstract: A plastic fluid subterranean distribution box with integral seal for a pipe, permanently and sealingly mounted in an opening in a wall of the box, including a substantially continuous annular bond between the seal and the wall on one side of the wall.

Abstract: A single unit, stiff and strong plastic molded wheel spacer for a reinforcement rod used in concrete is split into two sections connected by an integral hinge at one end and fastened together by a ratchet assembly at the other end. The rod is gripped at the center of the wheel by a pair of saddles, one on each section. A finger attached to one of the sections between the saddle and hinge prevents the rod from moving past the saddle to the hinge.

Abstract: A seal and closure member of elastomeric material adapted to be cast in situ and including a cylindrical body portion and an integral frusto-conical skirt therewithin. The skirt includes two weakened narrow annular portions of different size, on different centers, across the smaller diameter end portion of the skirt, and another weakened narrow annular portion on the skirt, axially displaced from the smaller diameter end portion.

Abstract: A first wall with a plurality of openings to pass liquid and particulate matter, includes four arrangements of ribs on the back. The ribs are spaced from the openings to reduce surface contact with the liquid and particulate matter. The ribs of the first and second arrangements are of uniform height and intersect to form open ended boxes. The ribs of the third and fourth arrangements extend from ribs of the first and second arrangements respectively, each extended rib curving down from each side of a high point, to the rib from which it extends.

Abstract: A retaining wall module with a front wall which includes a rearwardly depending horizontal base wall and two upstanding rearwardly depending side walls. The front wall extends beyond the attachment of the side walls. Another horizontal base wall is attached to the bottom of the extending portion of the front wall and to a side wall. Recesses are provided at the top and bottom of the side walls for receiving transversely, stabilizer bars which bridge between adjacent modules. Bar or ridge means on the bottom wall, generally parallel to the front wall, retain geogrid fabric when covered with weighty material.

Abstract: A baffle includes a conduit and a flow director flap portion. The conduit includes, at its front, a curved wall generated on an axis running the length of the conduit. One pair each of two pairs of angled walls, extending the length of the conduit, is attached to each side of the curved wall by a free edge of one of the pair, the other edge of the pair being attached to a wall for mounting, the wall having holes for mounting the baffle to a concrete septic tank wall, over a port in the tank wall. The angled walls are preferably perpendicular to each other and to the wall for mounting, the two walls formounting being coplanar and at the back of the conduit. The flow director portion includes two angled walls, one is for attaching the portion to the back of the conduit, the other extends over the end of the conduit and has a surface that is further from the curved wall than it is from the paired walls when the flow director portion is attached to the conduit.