An interlocking gutter system with perforations in the visor allows for the maximum amount of water drainage while blocking debris from entering the gutter. The gutter trough has an increasing radius as it approaches the downspout, to increase the capacity for carrying water. In the event that debris does enter the gutter, the interlocking mechanism can be disengaged, thereby allowing the gutter trough to drop away from the visor, dumping accumulated debris with minimal effort. The perforations in the visor can be patterned and sized in order to block the most common debris encountered in that installation. The gutter may allow water to enter the trough via a coanda slot in addition to perforations in the visor. The gutter system may have multiple troughs to further assist in draining a maximum amount of water. In the event of a clog, the system is emptied using an endcap.

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).

A system and devices to clean a rain gutter include a selectively openable end cap provided at an end of a gutter that is configured to be selectively positionable between a closed state and an open state to access an interior of the gutter, and a plurality of debris collecting members configured fit inside the gutter and to be selectively inserted and removed from the gutter in a sliding manner, wherein each of the debris collecting members is configured to be coupled to another of the debris collecting members such that an entirety of coupled debris collecting members may be moved along the gutter by force applied to one end of the coupled debris collecting members.

A gutter debris barrier system for preventing debris from entering a gutter includes a frame that is attached to a fascia of a building and a filter screen. The frame may include a floor with slots punched therein, with ribs on either side of the slots that form channels. The channels may be tapered to improve the speed and efficiency of heat transfer, and also to funnel water down into the gutter. The ribs may have planar upper surfaces or tips lying in a common horizontal plane and supporting a flat filter screen.

There is described a drainage structure for collecting and removing liquid from an area, the drainage structure comprising: a catchment reservoir; an outlet; an outlet orifice located at an interface of the catchment reservoir and the outlet, wherein the outlet orifice enables liquid to flow between the catchment reservoir and the outlet; and an outlet orifice surface arranged adjacent the outlet orifice, the outlet orifice surface comprising at least one protrusion which protrudes into the catchment reservoir and/or the outlet.

A roof drain assembly includes a drain body, a gravel guard, and a cover. The drain body includes an inlet, an outlet, and a conduit between said inlet and outlet. The gravel guard includes a frame having a top opening, a bottom opening, a plurality of castellations separated from each other by a plurality of gaps. The gravel guard may be removably coupled to the drain body or integral with the drain body. The cover is configured to be removably coupled to a top surface of the gravel guard (e.g., at least a portion of the plurality of castellations). The cover includes a plurality of openings configured to allow fluid to flow therethrough into the drain body.

A roof drain including a base defining a channel and an axis, a gravel guard coupled to the base and including a plurality of teeth, where the gravel guard defines a plurality of gullets between the teeth, and a dome coupled to the base, where the dome includes a plurality of ribs, where the ribs define a plurality of gaps therebetween, and where each gap is radially aligned with a corresponding gullet.

A roof drain including a base defining a channel and an axis, a gravel guard coupled to the base and including a plurality of teeth, where the gravel guard defines a plurality of gullets between the teeth, and a dome coupled to the base, where the dome includes a plurality of ribs, where the ribs define a plurality of gaps therebetween, and where each gap is radially aligned with a corresponding gullet.