Abstract

A method of removing sediment from fluid flow within a storm water drain pit by deflecting flow entering the pit towards the side walls of the pit by one or more deflectors. This reduces the energy of the fluid flow and promotes settling of sediment within the catch pit. Each deflector is preferably of a concave form and may be located in a storm water drain pit bag or suspended. A removable catch basin receptacle for a storm water drain pit includes a container has a low flow outlet defining a fluid path for fluid at a first level within the container to a second level, higher than the first level, outside the container. An overflow path provides a fluid flow path out of the container at a level higher than the first or second level.

IPC Classes  ?

• E03F 5/14 - Devices for separating liquid or solid substances from sewage, e.g. sand or sludge traps, rakes or grates
• E03F 5/16 - Devices for separating oil, water, or grease from sewage in drains leading to the main sewer
• E03F 5/10 - Collecting-tanksEqualising-tanks for regulating the run-offLaying-up basins
• B01D 35/00 - Filtering devices having features not specifically covered by groups , or for applications not specifically covered by groups Auxiliary devices for filtrationFilter housing constructions
• B01D 21/00 - Separation of suspended solid particles from liquids by sedimentation
• B01D 21/02 - Settling tanks

Abstract

A storm water drain pit having a flow control system which, during periods of low flow, maintains the level of liquid in the pit below a first level and, during periods of high flow, maintains the level of liquid above a second level. A first collapsible frame has perforated panels connected together by hinge joints so that the panels may be folded into a flat pack configuration and unfolded to form a frame to surround and support a storm water drain bag. A tubular frame may be formed from by rolling up a perforated sheet into a cylinder of desired diameter, fitting bands to the top and bottom of the cylinder, fixing them to the cylinder and fitting a base. The bands may be flat strips having support brackets provided at intervals projecting away from a flat face of the strip to provide support for the rim of a filter bag. A storm water filter system includes a pit having an inlet and an outlet; a plurality of pit inserts in the form of perforated frames supporting filter bags; a flow distributor which distributes fluid from the inlet into all or selected ones of the plurality of pit inserts; and an outlet for receiving liquid passing through the pit inserts exiting from the pit.

IPC Classes  ?

• E03F 5/20 - Siphon pipes or inverted siphons
• E03F 5/10 - Collecting-tanksEqualising-tanks for regulating the run-offLaying-up basins
• E03F 5/14 - Devices for separating liquid or solid substances from sewage, e.g. sand or sludge traps, rakes or grates
• E03F 5/04 - Gullies with or without odour seals or sediment traps

Abstract

A storm water drain filter including a collapsible frame supporting a filter bag. The filter may be installed in a stormwater drain pit to capture contaminants and particulate matter before it enters a stormwater drain. The collapsible frame is light weight, compact, simple and inexpensive. The filter bag is secured to the frame so as to maintain its shape and avoid deformation. There is also disclosed a method of installing a stormwater drain filter in a stormwater drain pit to provide an effective seal between the stormwater drain filter and the pit.

IPC Classes  ?

• E03F 5/14 - Devices for separating liquid or solid substances from sewage, e.g. sand or sludge traps, rakes or grates
• E03F 3/04 - Pipes or fittings specially adapted to sewers
• E03F 5/04 - Gullies with or without odour seals or sediment traps