A pool strainer basket insert system and method are contemplated in which a high porosity, coarse fibrous mass is inserted in a pool skimmer basket. Via optimization of the material properties of the fibrous mass and configuration such that approximately 50% of the fibrous mass is located above the waterline and 50% below the water line the problems of the prior art may be solved via the retaining properties of the fibrous mass, enabling insects and small organic matter to be retained and preventing their migration back to the main body of the pool.

A pool strainer basket insert system and method are contemplated in which a high porosity, coarse fibrous mass is inserted in a pool skimmer basket. Via optimization of the material properties of the fibrous mass and configuration such that approximately 50% of the fibrous mass is located above the waterline and 50% below the water line the problems of the prior art may be solved via the retaining properties of the fibrous mass, enabling insects and small organic matter to be retained and preventing their migration back to the main body of the pool.

A filter apparatus (10) has a plurality of filter elements (20) in a filter housing (12) having a filter inlet (50) for a fluid to be filtered and a filter outlet (52) for the filtered fluid. A pressure control device (42) has at least one control plate (58) located inside a connection chamber (14). The control plate laterally passes over individual upper element openings (54) of the filter element to be backwashed (20), in a predefinable sequence, covering the opening to an increasing degree and then exposing the opening again. A discharge opening (46) of the backwash device (44) is, at least in part, fluidically connected to a lower element opening (56) of the filter element (20) to be backwashed, as the pressure control device (42) moves towards the upper element opening (54).

A filter apparatus (10) has a plurality of filter elements (20) in a filter housing (12) having a filter inlet (50) for a fluid to be filtered and a filter outlet (52) for the filtered fluid. A pressure control device (42) has at least one control plate (58) located inside a connection chamber (14). The control plate laterally passes over individual upper element openings (54) of the filter element to be backwashed (20), in a predefinable sequence, covering the opening to an increasing degree and then exposing the opening again. A discharge opening (46) of the backwash device (44) is, at least in part, fluidically connected to a lower element opening (56) of the filter element (20) to be backwashed, as the pressure control device (42) moves towards the upper element opening (54).

A durable and collapsible strainer basket for pool equipment includes a rigid annular top portion having a radially extending rim; and a flexible basket extending downward from the rigid annular top portion, the rim of the rigid annular top portion including a downward facing surface that extends radially outward beyond the flexible basket and that is positioned to rest on a ledge of a pool equipment cavity, wherein the flexible basket includes a tapered outer shape formed by two or more flexible silicone annular sections having a plurality of holes passing therethrough, wherein the two or more flexible silicone annular sections are configured to be collapsible such that the flexible basket includes a collapsed configuration and an expanded configuration.

A durable and collapsible strainer basket for pool equipment includes a rigid annular top portion having a radially extending rim; and a flexible basket extending downward from the rigid annular top portion, the rim of the rigid annular top portion including a downward facing surface that extends radially outward beyond the flexible basket and that is positioned to rest on a ledge of a pool equipment cavity, wherein the flexible basket includes a tapered outer shape formed by two or more flexible silicone annular sections having a plurality of holes passing therethrough, wherein the two or more flexible silicone annular sections are configured to be collapsible such that the flexible basket includes a collapsed configuration and an expanded configuration.

The invention relates to a storm water drain pit comprising: an inlet for storm water; a filter for removing particles from the storm water, comprising a cylindrical body comprising coherent man-made vitreous fibres (MMVF) bonded with a cured binder composition; wherein the cylindrical body has a hollow centre and an outer wall; a guide element for guiding water from the inlet into the cylindrical body; a sedimentation chamber for sedimentation of particles from the storm water, wherein the cylindrical body is positioned below the inlet and above the sedimentation chamber; an outlet for filtered water; wherein the outlet is positioned above the sedimentation chamber and below the inlet; and a separation element for separating the sedimentation chamber from the outlet; wherein the cylindrical body has a density in the range of 50 to 200 kg/m.sup.3, a binder content in the range of 2 to 5 wt % and the outer wall has a circumferential thickness in the range of 2 cm to 20 cm.

The invention relates to a storm water drain pit comprising: an inlet for storm water; a filter for removing particles from the storm water, comprising a cylindrical body comprising coherent man-made vitreous fibres (MMVF) bonded with a cured binder composition; wherein the cylindrical body has a hollow centre and an outer wall; a guide element for guiding water from the inlet into the cylindrical body; a sedimentation chamber for sedimentation of particles from the storm water, wherein the cylindrical body is positioned below the inlet and above the sedimentation chamber; an outlet for filtered water; wherein the outlet is positioned above the sedimentation chamber and below the inlet; and a separation element for separating the sedimentation chamber from the outlet; wherein the cylindrical body has a density in the range of 50 to 200 kg/m.sup.3, a binder content in the range of 2 to 5 wt % and the outer wall has a circumferential thickness in the range of 2 cm to 20 cm.

A filter for filtering storm water in an outfall pipe comprising: a line comprising an anchor attachment point at a proximal end of the line; and a plurality of individual treatment units (ITUs) securely connected in series to the line with a gap between adjacent ITUs, wherein each ITU has a size and shape capable of fitting inside the outfall pipe, and wherein each ITU comprises a mesh cage configured to filter contaminants out of the storm water.

A filter for filtering storm water in an outfall pipe comprising: a line comprising an anchor attachment point at a proximal end of the line; and a plurality of individual treatment units (ITUs) securely connected in series to the line with a gap between adjacent ITUs, wherein each ITU has a size and shape capable of fitting inside the outfall pipe, and wherein each ITU comprises a mesh cage configured to filter contaminants out of the storm water.