Abstract: A molded thermoplastic domed end cap, for attachment to the end of an arch shape cross section leaching chamber or stormwater chamber, has a multiplicity of buttresses, to provide facet surfaces where pipe connections may be made. The essentially planar surface portions have tear out or cut out regions, for pipe openings. The buttresses face in different directions, relative to the longitudinal axis of the end cap, to conveniently accommodate pipes running in different angular directions. Pipes, which pass through openings in the surfaces of the buttresses, are supported by molded in step-saddles of the buttresses. Molded in stops limit inward motion of pipes.

Abstract: 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.

Abstract: Arch shape cross-section leaching and stormwater chambers are connected together so that swiveled angling is obtained at the joint. Angling is accomplished by means of an integral or detachable dome end comprising a conical section. A like chamber with an ordinary end mates by overlapping the dome. Or a like chamber may have an opposing and overlapping end, which also comprises a dome. A coupling for connecting two ordinary end chambers is comprised of two spaced apart conical domes spaced apart by a connector. The connector between the domes is optionally straight or angled. The couplings enable chambers to be connected at diverse angles to each other, as well as to be connected parallel with offset, i.e., with zigzag path.

Abstract: In a lighting fixture such as an exit sign, a light emitting diode lighting device is provided for mating engagement with an electrical socket of the lighting fixture. The light emitting diode device has a plurality of light emitting diodes recessed in a U-shaped channel for directing light through a diffuser into a desired illumination pattern.

Abstract: In lighting fixture such as an exit sign, a light emitting diode lighting device is provided for mating engagement with an electrical socket of the lighting fixture. The light emitting diode lighting device has a plurality of light emitting diodes with a light directing member spaced therefrom for directing light into a desired illumination pattern. The light directing member can be wedge or parabola shaped.

Abstract: In a lighting fixture such as an exit sign, a mounting base assembly is provided on a light emitting diode lighting device for mating engagement with an electrical socket. Once full mating engagement is achieved between the electrical socket and a base member of the mounting base assembly, the position of the housing carrying the light emitting diodes of the lighting device can be adjusted for alignment purposes without disturbing the full mating engagement of the electrical socket and the base member.