A drainage system, comprising a collector which is arranged to collect liquid and a drainage pipe having a pipe inlet that opens into the collector such that liquid collected by the collector drains through the pipe inlet. The drainage pipe is provided with a vent spaced away from the pipe inlet. The vent is arranged such that, when liquid collected by the collector occludes the pipe inlet, liquid flowing through the drainage pipe draws air into the drainage pipe through the vent.

A water flow device consisting of: a tubing, the tubing comprising an inlet end, and an outlet end; an attachment means on the inlet end, the attachment means configured to attach the inlet end to the outer surface of a downspout of a gutter. A water flow device comprising: a tubing, the tubing comprising an inlet end, and an outlet end; an attachment means on the inlet end, the attachment means configured to attach the inlet end to the outer surface of a downspout of a gutter; a filter located on the tubing, the filter configured to filter the liquid exiting the tubing.

A downspout guard having opposed sidewalls and opposed end walls connected to a top wall, all formed from material having openings therethrough, such as perforated metal. Bottom edges of the walls engage a gutter bottom wall to hold the guard in place and forcing water to flow through the guard before entering the downspout. The sidewalls can engage gutter front/back walls, further holding the guard in place. Trapped debris enhances further debris entrapment, even trapping particles smaller than the material openings.

A debris trap for a downspout comprises an angled grate, a baffle, and a cover piece. The downspout has an opening with a vertical extent and a horizontal extent. The angled grate has holes to enable fluid to flow through the angled grate and the angled grate can be secured to the inside of the downspout. The baffle can be secured above the vertical extent of the opening, extend partially behind the opening, and angle inward to direct fluid toward the rear of the angled grate. The cover piece can comprise a top flange configured to removably secure between the baffle and the downspout and a bottom flange configured to contact the angled grate and/or a portion of the downspout below the vertical extent of the opening. The debris trap can prevent debris from clogging the downspout.

Devices, systems, and methods for capturing debris from downspouts are provided. Downspout debris collection devices are installed to exits of downspouts of a gutter system for a building. A construction activity is performed at a roof of the building and netting collects debris exiting the downspouts while allowing water to escape. The downspout debris collection devices, with the collected debris trapped therein, are subsequently removed and at least the collected debris are disposed of.

A downspout drain filter includes a housing and a filter media. The housing defines an internal cavity, an inlet to the internal cavity along a top of the housing, and an outlet from the internal cavity along a bottom of the housing. The filter media is disposed within the internal cavity. The filter media divides the internal cavity into an upper chamber and a lower chamber. The filter media is configured to trap debris in the upper chamber from fluid flowing downward through the internal cavity. The filter media is permeable such that the fluid flows from the upper chamber to the lower chamber.

A downspout drain filter includes a housing having walls. The walls define an internal cavity operable to receive a filter media, an inlet to the internal cavity, and an outlet from the internal cavity. The walls include a sloped surface extending into the internal cavity along an intersection between a first of the walls and a second of the walls such that the internal cavity tapers in a direction that extends from the inlet to the outlet along the sloped surface.