A method is provided for the installation of varied sewer rehabilitation lining materials within an existing sewer while conveying sewage flow through an internal bypass contained on a sled that applies the rehabilitation materials, thus eliminating the need for an expensive, intrusive above grade external bypass. The apparatus is compatible with the various rehabilitation materials, technologies and methodologies currently available in the industry. The method and apparatus can be utilized to restore the original structural integrity of a sewer pipe or to provide a corrosion barrier. Multiple and varied rehabilitation materials (including but not limited to epoxy, geopolymer, mortar, cement, etc.) can be applied using the same apparatus. The apparatus can also be utilized to clean and televise the sewer prior to and during the rehabilitation process.

An opening/closing device according to the present invention includes a gate, a fall prevention unit, a support release unit, a first float, a floating prevention unit, a second float, and a floating prevention release unit. The gate receives a flow of fluid, and is able to fall down toward a downstream direction of the flow. The fall prevention unit supports the gate, thereby preventing the gate from falling down. The support release unit releases the support for the gate by the fall prevention unit. The first float is arranged on an upstream side of the gate, is arranged on one of the left side and the right side of the gate viewed from upstream, and is less in the specific gravity than the fluid. The floating prevention unit prevents the first float from floating.

Apparatus and a method for cleaning accumulated sediment from storm drain conduits and other large-diameter conduits. A nozzle assembly is arranged to deliver a high-volume flow of water at a pressure high enough to loosen sediment from the interior of a conduit and to propel the nozzle assembly and an associated nozzle feed hose upstream within a conduit being cleaned. Water from the nozzle assembly flushes the sediment downstream and is then collected, partially cleaned, and reused in the nozzle assembly. Mud and clay may be left in the water to increase its specific gravity and viscosity. A self-contained portable and mobile system includes a tank and apparatus for removal of high concentrations of entrained or suspended solids, and a pump and conduits for delivering a high-volume flow of water, containing quantities of suspended solids, to the nozzle assembly.

Coaxial video push-cables are disclosed. One embodiment includes a central conductor and a multi-dielectric stack of multiple concentric tubular layers disposed around the central conductor having one or more structural layers and one or more impedance tuning layers where the thickness of materials of each layer are selected to provide a pre-defined elastic modulus and electromagnetic impedance, an electromagnetic shielding layer, and a jacket enclosing the shielding layer, multi-dielectric stack layers, and central conductor.

A pipeline dredger, including a compressed air gun and a sealing apparatus, wherein the compressed air gun includes an L-shaped air pipe, a cavity body and a gun handle; an exhaust apparatus is arranged in the cavity body; a sealed compressed air chamber is formed between the exhaust apparatus and the cavity body; the exhaust apparatus includes a tubular connecting pipe and an exhaust pipe connected mutually; one end of the exhaust pipe is connected with the L-shaped air pipe, and the other end is a connecting end; one end of the connecting pipe is a chamber, and the other end is connected with a pressure release valve; the connecting end is inserted into the chamber; a vent hole is formed in an inner wall of the chamber so that the chamber is communicated with the compressed air chamber; a piston structure which is always abutted against the connecting end is arranged in the chamber; the piston structure separates the chamber from the exhaust pipe; a pressure release airflow generated during pressure release of the pressure release valve flows into the chamber from the compressed air chamber and drives the piston structure to separate from the connecting end so that the airflow flows into the exhaust pipe from the compressed air chamber through the chamber and is discharged from the L-shaped air pipe; the sealing apparatus comprises an air-filled bag installed on the L-shaped air pipe; and the inflated air-filled bag can block a pipeline opening.

A septic sensor sprayer, including a rod, a hose attachment portion disposed at a first end of the rod to receive an external hose to be removably fixed thereto, such that the hose attachment portion receives water from the external hose, and a rotatable head disposed at a second end of the rod to rotate upon receipt of water from the rod.

The present invention relates to a retractable floodwall unit that comprises a foundation unit having a plurality of guide tracks along side walls of the foundation unit, a floodwall panel stowed in the foundation unit; a power system for raising and lowering the floodwall panel, and a plumbing system. The plumbing system is configured to remove ground water from a dry-side of the floodwall unit and flood water that becomes located in the floodwall unit.

A sewer cleaning vehicle includes a monitoring device for detecting a water level in a plurality of water tanks using a sensor engaged with the water tanks. The vehicle can present to an operator the water level together with operational conditions of the vehicle. The vehicle can continuously fill the water tanks based on the water level, and inform the operator of the water tanks having a water level lower than a user-configurable threshold.

A method for tracking the location of a sewage hose. A sewage main line hose is connected to a sewage truck. A phosphorescent leader hose is connected to the end of the main line hose. A nozzle is connected to the end of the phosphorescent leader hose. The glow of the phosphorescent leader hose is observable in a dark sewage line. The location of the main line hose and the nozzle can be easily determined after observing the glow from the phosphorescent leader hose. In a preferred embodiment the phosphorescent leader hose utilizes europium phosphorescent powder for its phosphorescent properties.

A system and method for flushing a drain trap body having first and second channels with a dividing wall between that provides for one or more separate and dedicated streams of water operable to flush debris from the two-channel drain trap body.