Abstract: A storm water injection well incorporating a precast settling chamber having an overflow pipe extending upwardly into the chamber. The top of the overflow pipe is covered with a debris screen which in turn is covered by a debris shield. The shield is supported above the open end of the pipe and extends downwardly over the pipe end displaced radially from the surface of the pipe to form an annular passageway between the shield and the pipe to permit storm water to flow upwardly in the passageway into the pipe. An anti-siphon vent is provided in the debris shield. The precast settling chamber includes a plurality of weep holes sloped upwardly from the inside to the outside of the chamber. A drainage pipe is connected to the overflow pipe and delivers water from in the pipe to backfill in a ground hole through an injection screen.

Abstract: An improved culvert drainpipe and method of utilizing the same is disclosed characterized by use of an elongate thin wall extruded drainpipe element formed having a generally S-shaped configuration defining a pair of main flow channels and including plural curvilinear projections extending axially along the exterior of the element. The distal edges of the drainpipe element cooperate with one or more elongate wall extensions formed on the interior of the drainpipe element which prevent radial compression and/or collapse of the drainpipe element and deter debris from entering into the main the flow channels. In use, multiple drainpipe elements are bundled together in a generally parallel axis orientation whereby the curvilinear projections serve as secondary flow channels, improve debris segregation, and maintain space between adjacent drainpipe elements.

Abstract: A thermoplastic device for leaching sewage system effluent into the earth has the shape of an inverted trough. Its sidewalls have slot shaped perforations; above each slot is a lip; beneath each slot is one or more protuberances, preferably rectanguloid in shape. The combination of lips and protuberances prevent compaction of the earth against the sidewalls when the devices are buried without the use of stone fill. They permit the formation of a good biocrust layer and facilitate the exfiltration of liquid into the earth.

Abstract: An improved water distribution system characterized by a construction including an irrifluent pipe disposed below the soil surface for dispersing water or treated waste water at a controlled rate. The irrifluent pipe includes an inner fluid conduit having apertures formed therethrough and an outer cover mounted in partially surrounding relation to the inner conduit and overlying the apertures. The outer cover is attached to the inner fluid conduit in spaced apart relation thereto so that the dispersed fluid slowly seeps into the ground.

Abstract: A perforated drainpipe in which at least one sheet comprised of polymeric material is shaped in generally tubular configuration with adjacent edges thereof being slightly spaced apart to define therebetween a gap extending along the tubular sheet, and at least one ribbon comprised of polymeric material, which can be the same or different as that in the tubular sheet, helically wound around the tubular sheet, preferably by extrusion, and integrally bonded thereto so as to reinforce the same and maintain the shape of the same. The sheet or sheets can extend longitudinally, being bent or curved width-wise so as to have such tubular shape, with the gap extending longitudinally.

Abstract: A subsoil irrigation system comprising a flexible conduit with a longitudinal row of spaced outlet nozzles passing through the conduit and exteriorly protected by a flat having an edge secured to the conduit, a free edge with a bead, and wherein the conduit is formed on a slight curve so that when it is straightened in position underground the free edge of the flat will lie in intimate contact with the conduit to prevent the intrusion of foreign particulate matter in the nozzles.

Abstract: A drain pipe consisting of an outer pipe casing, which downwardly or on the lower surface is provided in the longitudinal direction with a recess, from which two partition walls extend upward and are connected at the upper end to the inside of the pipe casing via extensions of the partition walls resembling inclined roofs. In the inclined roof shaped extensions, which are connected in a line at the inside of the pipe casing, overflow openings are milled in a single operation.

Abstract: An underground watering system having a water distribution pipe and at least one strainer box over the water distribution pipe, the strainer box containing gravel or other particulate matrial, and the distribution pipe having a water emitting aperture which is located within the strainer box, so that water is discharged into the particulate material.

Abstract: A wall drainage system for protecting foundations and basement walls from water contact and seepage and including a water-impermeable synthetic resin backing plate adapted for securement to a surface to be protected and defining drainage channels along one side thereof facilitating drainage of water downwardly along the backing plate through the channels. A water-permeable synthetic resin strainer film is secured to the backing plate across the drainage channels. A synthetic resin water-receiving footer structure is connected to the lower end of the backing plate and includes a foraminous, synthetic resin bead pack and a perforated drainage pipe at least partially surrounded by the bead pack.

Abstract: An improved underground drainage pipe formed of an extruded stiffly flexible plastic member having a trough with spaced upstanding lips and an integral overlying roof with triangular shaped drainage openings formed through the lips at regular intervals along the length of the pipe. When buried, the drainage openings resist clogging by gravel or pebbles in the surrounding soil thereby improving the drainage capability of the pipe. The thickness of the trough increases from the center point to the lips thereby compensating for the drainage openings and enabling the pipe to withstand vertical loading forces.

Abstract: This invention relates generally to underground irrigation systems and more specifically to the specific equipment required by such systems in the form of pipes, covers, valves and the like. This invention provides a means by which existing conventional surface sprinkling systems may be easily converted to the underground variety and a simplified inexpensive construction of an underground irrigation system.

Abstract: A modular drain field section and a method for making a drain field section are disclosed having upper and lower casings which are connected together to form each drain field section. Both upper and lower casings have a center pipe portion which, when connected together, forms a central pipe and each casing has troughs on both sides of the center pipe portion. The lower casing troughs have a plurality of openings therein and a spillway connects the central pipe with the lower casing troughs. The modular drain field sections are connected together to form a drain field without the use of rock media, fill, drain tile, grace board or felt paper. A method of making the modular drain field section includes using the same mold both for the upper and lower casings.