An insulating disc can be easily installed and removed from inside a riser of a septic tank. The insulating disc is seated atop an opening of the tank lid and seals around the riser inner surface. The disc can include a core formed of R-10 extruded polystyrene sandwiched between two layers of high-density polyethylene. A flexible gasket can extend outward from the disc to seal against the inner surface of the riser. Retention tabs can also be provided to center and hold the disc in place. The disc can be divided into two semicircular halves that are hinged together. A hook, eyebolt and/or rope can be used to aid in removing the disc from the riser.

A rain overflow basin for collecting and storing rainwater, mixed water, or wastewater, has an inflow, an outflow, a basin chamber, a basin spillway, which is equipped with a weir threshold and is connected downstream of the basin chamber. A drain discharges the basin spillway, and a purification device purifies water flowing from the basin chamber to the basin spillway. A retention wall between the basin chamber and the basin spillway dams up water accumulating in the basin chamber. Water draining from the basin chamber is dammed up in a storage space is between the retention wall and the weir threshold, to reach the basin spillway via the weir threshold. The retention wall includes a passage opening. A purification device extends into the basin chamber such that water draining from the basin chamber through the passage opening into the storage space flows through the retention element.

A kit, and an assembly formed with components of the kit, comprises a fitting for the top of a septic tank or water tank, one or more frusto-conical rings shaped to interconnect with an identical ring to form an undulating wall riser that extends upwardly from the tank top fitting, and a lid. The lid is shaped for multi-purpose use: closing off the opening of either the large end or the small end of a ring/riserwhichever is uppermost, or closing off the fitting when there is no riser. Joints between the rings of the riser, and between a ring/riser and the fitting of a tank, are held together by latching tabs and/or screws. A fitting may be integral with a tank top.

A modular system for reducing the total suspended solids of waste, including scum, sludge and water layers, includes a plurality of chambers each being connected in succession by a corresponding one of a plurality of flow pipe segments including an inlet segment, an outlet segment and at least one middle segment, wherein the waste enters the septic tank via the inlet segment and is transferred between each of the plurality of chambers via the at least one middle segment; a corrugated flow pipe in fluid flow communication with the outlet segment; and the corrugated flow pipe being sized and configured for use as a settling zone for removal of a portion of the total suspended solids and wherein an amount of water from the water layer within the chamber adjacent the outlet segment enters the corrugated flow pipe and passes through the outlet segment.

To provide a portable device capable of capturing a flow of water from a stream, storm drain or runoff channel, on command and send that captured water into a pipe system, while allowing remote adjustment of the capture and flow rates out of the cube device, the stormwater syphon cube includes a rock grate to prevent stormwater borne objects from entering the device, and an exit valve adjustable via cable control, a side extraction valve adjustable via cable control to adjust the water flow into the extraction pipe, and extraction pipe attached to the cube to carry extracted water away to storage. The sealed exit pipe acts as a syphon drawing water out of the cube.

A siphon float system comprises a central dowel in communication with a batch reactor. A siphon float is slidably engaged with the central dowel, wherein the siphon float is hydraulically operated. A plurality of valves are in communication with the siphon float, wherein the plurality of valves selectively control a flow of water. one or more dowel pegs contact one or more valve triggers based on a level of fluid in the batch reactor; and a plurality of hoses to direct the flow of water.

A frameless, modular connector pipe screen insert designed for installation within storm water infrastructure, including a catch basin, for the treatment of storm water by removing trash and debris from incoming water flow. The connector pipe screen is optimally designed with perforation sizes and void areas to remove trash and debris; thereby preventing further pollution of nearby water systems including rivers, lakes, and oceans.

A settling basin insert for controlling fluid flow into a settling basin has a first and second side wall in opposition, and a top surface extending between the first and second side walls, defining a sump extending from head to end. Fluid apertures extend through the top surface to permit fluid to communicate with the sump and an access aperture in the top surface permits a vacuum hose to pass into the sump. The first side wall is taller than the second side wall, and the first and second side walls each define a guide wall extending above the top surface. The second side wall is configured to be adjacent the settling basin. The first and second side walls direct inflowing fluid along the settling basin insert and through the fluid apertures in the top surface, decelerating the fluid for settling of sediment in the settling basin insert.

A liquid level maintainer for controlling a liquid level in a reservoir. The liquid level maintainer includes an inlet configured to be coupled to a source of pressurized fluid, an opening configured to receive liquid from the reservoir, a first outlet, and a second outlet. A first flow path is defined between the inlet and the first outlet, and a second flow path is defined between the inlet and the second outlet. A constriction is disposed in the second flow path, the constriction configured to provide a pressure differential in the second flow path for drawing the liquid from the opening towards the constriction. A third flow path is defined between the opening and the constriction. A valve is disposed in at least one of the first or second flow paths and configured to selectively open and close the at least one of the first or second flow paths.

An insulating disc can be easily installed and removed from inside a riser of a septic tank. The insulating disc is seated atop an opening of the tank lid and seals around the riser inner surface. The disc can include a core formed of R-10 extruded polystyrene sandwiched between two layers of high-density polyethylene. A flexible gasket can extend outward from the disc to seal against the inner surface of the riser. Retention tabs can also be provided to center and hold the disc in place. The disc can be divided into two semicircular halves that are hinged together. A hook, eyebolt and/or rope can be used to aid in removing the disc from the riser.