A subterranean coupler for slidably receiving a pipe therethrough and for coupling the pipe to a subterranean vessel. The coupler is mountable to a reinforcing grid prior to the coupler and reinforcing grid being cast in a concrete wall of the subterranean vessel. The coupler includes a longitudinally-extending axis and a cylindrical wall defined about the axis, the wall having an inner surface, an outer surface, and first and second ends. The coupler further includes a plurality of radially-extending, circumferentially-spaced engagement members integrally-formed with the outer surface. The engagement members are engageable with grid members of the reinforcing grid to mount the cylindrical wall to the reinforcing grid prior to casting. The coupler further includes pipe receiving means associated with the inner surface for slidably receiving the pipe therethrough and securing the pipe to the coupler, whereby the coupler may be releasably mounted to a reinforcing grid using the engagement members and then cast into a concrete wall of a subterranean vessel with the opposed first and second ends being exposed on respective opposite sides of the concrete wall, and a pipe may be slidably inserted through one of the ends into the pipe receiving means and thereby coupled to the subterranean vessel.
A molded plastic seal assembly, for use with a leaching or stormwater system component, comprises at least two embossed, preferentially eccentric, circles. Pulling on a tab tears out the interior portion of the seal, to create a hole which accommodates a first pipe diameter. A remaining crescent portion surrounding the hole has a multiplicity of perforations or other means for thinning. Thus, second larger diameter pipe pushed into said hole, deforms the crescent inwardly, so the hole diameter is increased, sufficient to fit and form a seal with the second pipe outside diameter. A seal assembly article made of polypropylene has a very thin wall at the bottom of the tear-out groove. Part of the injection mold is moved during molding, to enable filling of the mold in vicinity of the thin wall.
Plastic liner sections define a drainage channel when placed end to end. Each end has a stiff, double walled flange at each side of the end adapted to butt up to a similar flange at the adjacent end of the next sections. The double walled construction of the flanges stiffens the ends significantly reducing the risk of deformation by the hydrostatic forces produced by wet concrete during installation. A groove is formed inwardly of the flanges on a female end of the liner section and receives a sealing ring, which is held in place by a lip formed on a male end.
A seal plate includes tear out sections that leave pipe sealing openings, an externally threaded cylindrical portion that extends through a hole in a septic system distribution box wall, a resilient cup-shaped flange that faces one side of the wall around the hole, an internally threaded ring with hand grips that is screwed onto the cylindrical portion against the other side of the wall so that the wall is clamped between the ring and the cup-shaped flange and the flange bends axially, resiliently forcing concentric radially spaced axially extending ridges on the cup shape flange sealingly against the wall.
