Abstract: Apparatus suitable for installation in a wye cleanout fitting of a waste line. The apparatus includes four elements. The first element is a pipe. The second element is a valve attached to one end of the pipe and in fluid communication therewith. The third element is a seal having a bore therethrough, the pipe positioned in and sealed to the bore of the seal. The fourth element is a first pipe connector having a bore therethrough, the pipe positioned through and sealed to the bore of the first pipe connector at a position of the pipe between the valve and the seal.

Abstract: A concrete module for at least partial submergence in the surf to dissipate the energy of wave action and to promote the deposition of beach-restoring sand and pebbles comprises a series of passages which converge toward the shore-facing side of the module and terminate in an upwardly-directed opening which deflects the incoming water flow upward to further dissipate the wave energy and to create a reaction force on the module which tends to rotate or tilt it toward the shore. This tendency aids in neutralizing the natural tendency of barriers to rotate toward the sea as a result of sand being scoured out from beneath the seaward side of the barrier as a result of downwardly-deflected incoming wave energy.

Abstract: An off-shore reef-like structure for preventing beach erosion. The structure comprises a string of prism-shaped modules placed in side-by-side relation in the surf area along a line defined by a sand bar, for example, where waves normally break. Each module has oppositely inclined front and rear walls adapted to face seaward and landward, respectively. At least one flow control passage extends through the module so as to converge from its front to rear wall openings. Incoming waves flow through the passage in a manner dissipating the wave energy while minimizing the wave impact forces tending to move the module. An opening is provided in the module bottom wall in communication with a through conduit enabling the module to fixedly seat or interlock itself in either sandy or coral-like shoreline areas. The module is uniquely designed to provide a minimal air lifting load for helicopter installation.

Abstract: A traffic barricade or marker comprises a base in the form of a conventional pneumatic vehicle tire having a pair of substantially vertical flexible plastic tubular posts upstanding from the tire upper sidewall from aperture means located diametrically across from each other. The tubular posts in their unflexed condition are substatntially straight and upwardly diverging in a symmetrical manner away from the tire principal axis. A substantially rectangular structural member has a pair of longitudinally spaced tubular-like connector formations thereon of a size to be freely telescoped over the upper end portions of said posts. The structural member has a predetermined major dimension between its connector formations so as to continually flex the upper end portions of the posts into substantial parallel relation whereby said connector formations are releasably retained on the posts.