A cover for a drain is disclosed. 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. A top may be connected with the upper portion and may have a removable lid. An outer ring may be attached to an outer perimeter of the lower portion and have openings. The cover may include a mount with flex joints for securing the cover to contoured surfaces. The cover may include moveable parts for expansion/contraction of portions of the cover. The cover may be contoured to abut a structure such as a wall.

A vortex breaker and a drainage assembly with a plurality of fins extending radially outward from a common central axis to respective terminal edges. Each fin has an attachment member for cooperation with bars of a domed strainer installed over a drain inlet. Engagement of the attachment members and domed strainer rigidly fixes the vortex breaker relative to the domed strainer.

The present invention is to provide a system and a method for effectively preventing that gases/heat from an outlet are ascending from a gully and form ice, in addition to effectively drain liquids through a gully. The present invention is obtained by arranging a float so that said float and a portion of the gully define a closable opening for through flow, further arranged such that the float is preventing gases/heat from the outlet to ascend up from the gully and form ice and/or so that the float prevents that gas is drawn into the gully.

A roof flashing can include a bottom half and a top half. The two halves can each have a plate and a neck portion projecting away from the respective plate. The neck portions define portions of an aperture configured to encircle and seal against a post projecting away from a roof. At least part of the first neck portion can be slidably receivable in the second neck portion and the two portions can define a neck when the bottom half and the top half are engaged with one another.

A roof system is provided. The roof system includes a roof body capable of forming a flat roof or a corrugated roof, where the roof body is provided on a roof pillar; a gutter system is provided at a valley position of the corrugated roof or on the flat roof; a skylight system is further provided at a pitched roof or a ridge of the corrugated roof or on the flat roof; and a pressure relief adjustment component is provided on the skylight system. According to the roof system, a plurality of roof modules are assembled into the roof body. Two adjacent ones of the roof modules are fixed by a connecting plate and a self-locking component when assembled. A plurality of reinforcing points work cooperatively, so the roof system achieves a high utilization rate, and ensures the overall stability and bearing capacity of the roof.

The roof drain overflow cover with sensor cooperatively engages and covers a conventional roof drain cap cover to prevent trash from reaching and clogging the conventional roof basket cover and drain. Accumulating trash builds up on the screen of the overflow prevention device causing a doughnut shaped buoy connected to a trash tray to rise. The trash tray is retained to a base with magnets. When the water reaches a predetermined level, the doughnut shaped buoy rises pulling the trash tray away from the base allowing water to flow to the conventional roof drain basket and activating an overflow sensor and a control module. The control module is in communication with the water flow sensor and includes an indicator which is activated when the water flow sensor detects the detachment of the trash tray from the base indicating a potential flooding situation with the roof drainage system.

The present invention relates to a non-arch-shaped rainproof water-collection greenhouse, characterized by: a matrix of upright galvanized steel pipe columns, with adjacent columns fixed by cables connected to their upper ends, forming cable grids. A square greenhouse film with support rods along its edges is installed onto these cable grids. A water-collecting funnel and collection bucket are mounted at the center of the square film. The weight of the collection bucket and rainwater causes the square film to sag into a conical shape. To prevent excessive sagging or tearing, sag-limiting ropes are attached from the top ends of the four steel pipe columns corresponding to the film's corners, supporting the film from below and suspending the funnel and bucket in midair, creating a smooth, controlled sag. This invention features a rational design, simple structure, and minimal steel usage.

There is provided: a novel roof panel that is easy to manufacture, is durable, and is capable of completely preventing rainwater ingress and easily draining rainwater; a roof using the roof panel; and a three-dimensional structure with the roof. A precast concrete roof panel 10 includes on its upper surface 14 an inclined main portion 16 that is inclined downward toward an edge.

A roof flashing can include a bottom half and a top half. The two halves can each have a plate and a neck portion projecting away from the respective plate. The neck portions define portions of an aperture configured to encircle and seal against a post projecting away from a roof. At least part of the first neck portion can be slidably receivable in the second neck portion and the two portions can define a neck when the bottom half and the top half are engaged with one another.

The invention refers to a drainage system (100), in particular a roof drainage system, comprising an outlet member (10) and a flow restrictor (20), whereby the flow restrictor (20) is situated above the outlet member (10). The flow restrictor (20) comprises a contact portion (22) and the outlet member (10) comprises a flange portion (12), whereby a first sealing member (30) is arranged on and/or along the flange portion (12) of the outlet member (10) and a second sealing member (40) is arranged at the contact portion (22) of the flow restrictor (20).