An oil and grit separator system having twin vortex which uses gravity providing a twin vortex effect to remove sediment and oil from contaminated water. The system is designed to control storm water runoff and reduce the annual suspended solids loading of the granulometric particles. The conception and configuration of the system has a double action vortex. It ensures an optimal treatment level in either light or heavy rain and avoids re-suspension of particles. It also removes, separates and stores floating oil without any possible re-suspension of the matter.

An energy dissipator for use in a sumped manhole includes a sheet member. The sheet member defines a downstream surface, an upstream surface opposite the downstream surface, and opposing side edges each extending between the downstream surface and the upstream surface. The sheet member includes a plurality of apertures. Each of the plurality of apertures extends through both the downstream surface and the upstream surface. The sheet member extends in an arcuate manner between the opposing side edges. The dissipator is configured to intercept fluid flow within the manhole to decrease energy and control flow dynamics within the manhole.

A manhole base assembly and a method for making the same, in which a non-cylindrical, low-volume concrete base is fully lined to protect the concrete against chemical and physical attack while in service. This lined concrete manhole base assembly may be readily produced using a modular manhole form assembly which can be configured for a wide variety of geometrical configurations compatible with, e.g., varying pipe angles, elevations and sizes. The form assembly is configurable to provide any desired angle and elevation for the pipe apertures using existing, standard sets of form assembly materials, and may also be used in conjunction with industry-standard cylindrical casting jackets for compatibility with existing casting operations. The resulting system provides for flexible construction of a wide variety of lined manhole base assemblies at minimal cost, reduced concrete consumption and reduced operational complexity. The modular nature of the production form assembly also facilitates reduced inventory requirements when various manhole base assembly geometries are needed.

A connector for coupling a pipe to a vessel, the connector having an inner diameter to fit over the pipe and an inlet to receive a binder to fill and seal a cavity between the connector and the pipe. The invention also relates to method for connecting a pipe to a pit or wall comprising defining an opening in a sidewall of the pit or in the wall with an insert or a frame, providing a binder within the insert or frame to seal against the pipe which is inserted into the opening or into the insert or frame, wherein the binder binds the pipe to the insert or frame. The invention also relates to a pit incorporating the connector and an assembly including the pipe fixed to the connector.

A manhole base assembly and a method for making the same, in which a non-cylindrical, low-volume concrete base is fully lined to protect the concrete against chemical and physical attack while in service. This lined concrete manhole base assembly may be readily produced using a modular manhole form assembly which can be configured for a wide variety of geometrical configurations compatible with, e.g., varying pipe angles, elevations and sizes. The form assembly is configurable to provide any desired angle and elevation for the pipe apertures using existing, standard sets of form assembly materials, and may also be used in conjunction with industry-standard cylindrical casting jackets for compatibility with existing casting operations. The resulting system provides for flexible construction of a wide variety of lined manhole base assemblies at minimal cost, reduced concrete consumption and reduced operational complexity. The modular nature of the production form assembly also facilitates reduced inventory requirements when various manhole base assembly geometries are needed.

A sleeve adapter for installation over a corrugated pipe is provided. The sleeve adapter may comprise a tubular body, wherein the tubular body may have a smooth outer surface, a first monofilament wire connected by a first one-way clamp, wherein the first monofilament wire may extend around a first end of the tubular body, a second monofilament wire connected by a second one-way clamp, wherein the second monofilament wire may extend around a second end of the tubular body, a flexible elastomer hinge extending around the tubular body, and a plurality of sealing surface fins extending outwardly from an inner surface of the tubular body.

Embodiments of the present disclosure provide a stormwater drainage system including a multi-fit adapter for connecting at least one fluid pipe to a fluid basin. The multi-fit adapter may include a plate configured to be mounted on an outer surface of the fluid basin; and a plurality of concentric rings protruding from the plate. In disclosed embodiments, a curvature of the plate may correspond to a curvature of the outer surface of the fluid basin. In disclosed embodiments, each of the plurality of concentric rings may be configured to accommodate a fluid pipe.

A catch basin system includes a first conduit, a second conduit, a basin, and an access port. The first and second conduits are spaced-apart and are aligned along a first axis. The basin is disposed between the first and second conduits. The basin extends downward from the first and second conduits. The access port is aligned along a second axis, is disposed above the basin, is disposed between the first and second conduits, and extends upward from the first and second conduits. The access port is configured to provide access to the basin.

A catch basin system includes an upper housing and a lower housing. The upper housing defines an upper region of a first conduit and an upper region of a second conduit. The first and second conduits are aligned along a first axis. The lower housing is removably secured to the upper housing. The lower housing defines a lower region of the of the first conduit, a lower region of the second conduit, a third conduit disposed below the first conduit, a fourth conduit disposed below the second conduit, and a sump disposed between the third and fourth conduits and below the third and fourth conduits. The third and fourth conduits are aligned along a second axis. The first, second, third, and fourth conduits are each in fluid communication with sump.

A system for connecting a mainline pipe with an outlet pipe is provided. The system comprises an outlet pipe configured to be coupled to a mainline pipe near a proximal end of the outlet pipe, a first sleeve disposed on an exterior surface of the outlet pipe and comprising a first lip at a proximal end of the first sleeve, and a second sleeve disposed on the first sleeve and comprising a second lip at a proximal end of the second sleeve. The first lip of the first sleeve may be configured to abut an interior surface of the mainline pipe, and the second lip of the second sleeve may be configured to abut an exterior surface of the mainline pipe.