Disclosed is a drainage system (1) comprising: at least one water receiving unit (20) having: a water receptacle (22) for receiving water from an adjoining surface of an upper stratum; and at least one drainage unit comprising: a body; wherein: the water receptacle (22) can be integrated into the upper stratum; the drainage unit can be provided and oriented, at least in part, in a central stratum at a distance under the surface, with respect to its uppermost face, such that water flowing out of the water receiving unit (20) can flow into the drainage unit through a connection between the water receptacle (22) and the body; and the connection can be maintained irrespective of a change in this distance. Also disclosed are drainage units and methods.

A drain cover assembly. The cover may be used with roof drains or other drains and allow for fluid collection into the drain even with buildup of debris around or on the cover. The cover may have a lower flange or portion with a large area and extending outwardly in an arcuate configuration and having openings for fluid flow. The lower portion may be oriented at a small angle with respect to the horizontal. An upper portion may be connected to the lower portion and may be more vertically-oriented than the lower portion and also extend arcuately and having openings. Locking assemblies may be adjustable to secure the cover to a clamping collar over a drain. The locking assembly may include a base that slidingly engages the collar, and a housing that is secured over the base and to secure the cover to the collar.

A method to convert a current round drain structure imbedded within a tiled shower floor with a quadrangular structure includes steps of. Remove drain grate from current round drain structure imbedded within the tiled floor. Insert said quadrangular structure atop the current round drain structure, the quadrangular structure including. A lower section extending downward from the said quadrangular structure a circular cone shaped area defining departure port and a wall section extending upward from the lower section defining wall to contain and hold up a drain grill and a support section extending atop a tile floor outward from the lower section defining horizontal support flanges and the drain grill, square structure having a plurality of holes. Applying bonding layer of thin-set mortar, further including a supplemental tiled shower floor atop, tiled shower floor. Caulking thereby mechanically interlaces the quadrangular structure with a surrounding supplemental tile floor.

A method to convert a current round drain structure imbedded within a tiled shower floor with a quadrangular structure includes steps of. Remove drain grate from current round drain structure imbedded within the tiled floor. Insert said quadrangular structure atop the current round drain structure, the quadrangular structure including. A lower section extending downward from the said quadrangular structure a circular cone shaped area defining departure port and a wall section extending upward from the lower section defining wall to contain and hold up a drain grill and a support section extending atop a tile floor outward from the lower section defining horizontal support flanges and the drain grill, square structure having a plurality of holes. Applying bonding layer of thin-set mortar, further including a supplemental tiled shower floor atop, tiled shower floor. Caulking thereby mechanically interlaces the quadrangular structure with a surrounding supplemental tile floor.

A drain assembly comprises a drain pan, a trim member, and a drain cover. The drain pan has a base and a pan sidewall, and the trim member has a trim sidewall. The pan sidewall, at least a portion of the upper surface of the base, and the trim sidewall define a drain channel therebetween. The drain cover defines a plurality of apertures and is positionable above the drain pan. The trim member is configured to transition between a first position and a second position. In the first position of the trim member, the drain channel has a first width that extends in a transverse direction. In the second position of the trim member, the drain channel has a second width that extends in the transverse direction. The first width is different than the second width.

A drain assembly comprises a drain pan, a trim member, and a drain cover. The drain pan has a base and a pan sidewall, and the trim member has a trim sidewall. The pan sidewall, at least a portion of the upper surface of the base, and the trim sidewall define a drain channel therebetween. The drain cover defines a plurality of apertures and is positionable above the drain pan. The trim member is configured to transition between a first position and a second position. In the first position of the trim member, the drain channel has a first width that extends in a transverse direction. In the second position of the trim member, the drain channel has a second width that extends in the transverse direction. The first width is different than the second width.

A cover for a drain. The cover may be used with roof drains or other drains and allow for fluid collection into the drain even with buildup of debris around or on the cover. The cover may have a lower flange or skirt portion with a large area and extending outwardly in an arcuate or polygonal configuration and having openings for fluid flow. The lower portion may be oriented at a positive, zero, or negative angle with respect to the horizontal. The lower portion may be wider than a drain body over which the cover is used. An upper portion may be connected to the lower portion and may be more vertically-oriented than the lower portion and having openings.

A cover for a drain. The cover may be used with roof drains or other drains and allow for fluid collection into the drain even with buildup of debris around or on the cover. The cover may have a lower flange or skirt portion with a large area and extending outwardly in an arcuate or polygonal configuration and having openings for fluid flow. The lower portion may be oriented at a positive, zero, or negative angle with respect to the horizontal. The lower portion may be wider than a drain body over which the cover is used. An upper portion may be connected to the lower portion and may be more vertically-oriented than the lower portion and having openings.

The invention relates to a locking element (11) for securing a grate (3). The locking element (11) comprises a spring element (113) kept between a cover element (111a) and a spring support element (117). The spring support element (117) is displaceable relative to the cover element (111a) by means of an actuating element (115). The displacement of the spring support element (117) causes a movement of at least one of the ends (113a, 113b) of the spring element (113) relative to the cover element (111a).

The invention relates to a locking element (11) for securing a grate (3). The locking element (11) comprises a spring element (113) kept between a cover element (111a) and a spring support element (117). The spring support element (117) is displaceable relative to the cover element (111a) by means of an actuating element (115). The displacement of the spring support element (117) causes a movement of at least one of the ends (113a, 113b) of the spring element (113) relative to the cover element (111a).