A pivotable downspout extension system includes an adapter coupleable to a fixed-position downspout via a downspout aperture, a bucket hingedly coupleable to the adapter, and an extension arm. The extension arm is received by an extension arm receiving portion located on the bucket. The bucket and the extension arm remain in a substantially vertical position until a sufficient amount of water enters the bucket so as to overcome the weight of a weight chamber of the bucket and move the bucket's center of gravity. The bucket with the extension arm then pivots on a fulcrum point, allowing the water to exit the extension arm. Once emptied, the weight chamber of the bucket pivots the bucket and extension arm to the substantially vertical position.

A poultry drinker system includes a liquid container, which is filled with water; a drinking trough, which is fluidly connected to the liquid container; a float valve assembly, which is configured to regulate the flow of the liquid from the liquid container into the drinking trough; such that the float valve maintains the water level in the drinking trough as poultry drink the water.

A negative pressure pipeline opening-and-closing device includes a blocking member and a buoyant member. The buoyant member comprises two floats and a connection rod connected to the two floats. The liquid reservoir is provided with a guide therein, and the guide confines the two floats, the blocking member and the liquid outlet port in the same vertical line. A limiting member is arranged between the two floats and is fixed to an inner wall of the liquid reservoir. A maximum distance between the limiting member and a top wall of a lower float of the two floats is smaller than a maximum distance between a top wall of an upper float of the two floats and a top wall of the liquid reservoir. The negative pressure pipeline opening-and-closing device can replace an existing electrically controlled valve. Therefore, the cost is reduced, the maintenance is convenient and service life is prolonged.

A valve includes a valve body, valve arm hinge and valve piston. The valve arm hinge connects the valve arm to the valve body through a pivoting connection. The valve piston moves linearly in a valve piston channel. When a pressurized fluid contacts a second valve piston end, a force is applied to a second valve piston end. Movement of the valve arm from a first valve arm position to a second valve arm position allows the valve piston to move, under the force applied from closed, to open and allows fluid to flow through a valve channel. The float in the first valve arm position is above the position of the float when in the second valve arm position. If fluid in the tank goes below a critical tank fluid level, the valve arm moves from the first valve arm position to the second valve arm position.

A liquid level control system employs a flap gate for discharging liquid, but with a midstream headloss inducing device between the basin or tank and the flap gate. The flap gate opens when liquid level in the basin rises, and the opening of the gate is controlled by a counterweight positioned so as to decrease closing force as the gate opens farther, thus managing the outflow of liquid to efficiently return the basin to a design level. If flow from the basin is generally constant, the system will reach a point of equilibrium of gate opening and closing forces while liquid flows out from the basin.

A liquid level control system employs a flap gate for discharging liquid, but with a midstream headloss inducing device between the basin or tank and the flap gate. The flap gate opens when liquid level in the basin rises, and the opening of the gate is controlled by a counterweight positioned so as to decrease closing force as the gate opens farther, thus managing the outflow of liquid to efficiently return the basin to a design level. If flow from the basin is generally constant, the system will reach a point of equilibrium of gate opening and closing forces while liquid flows out from the basin.

Apparatuses, systems, and methods are disclosed for fluid flow control. A container is shaped to receive a liquid, and includes an outlet configured to allow the liquid to exit the container. A valve is configured to control a fluid flow based on a liquid level in the container. An output line coupled to the valve is configured to convey the fluid flow from the valve to a location outside the container. The location outside the container does not receive the liquid directly from the outlet.

Apparatuses, systems, and methods are disclosed for fluid flow control. A container is shaped to receive a liquid, and includes an outlet configured to allow the liquid to exit the container. A valve is configured to control a fluid flow based on a liquid level in the container. An output line coupled to the valve is configured to convey the fluid flow from the valve to a location outside the container. The location outside the container does not receive the liquid directly from the outlet.

An overfill prevention valve that is testable to ensure proper functionality of the valve. More particularly, in one embodiment the invention is an overfill prevention valve system including an overfill prevention valve having a blocking component. The blocking component is movable between a closed position, wherein the blocking component generally blocks fluid from flowing through the valve, and an open position, wherein the blocking component generally allows fluid to flow through the valve. The valve further including a float operatively coupled to the blocking component. The system additionally has an actuator that is operable to directly or indirectly move the blocking component to at least one of its open or closed positions to thereby enable testing of the overfill prevention valve.

An overfill prevention valve that is testable to ensure proper functionality of the valve. More particularly, in one embodiment the invention is an overfill prevention valve system including an overfill prevention valve having a blocking component. The blocking component is movable between a closed position, wherein the blocking component generally blocks fluid from flowing through the valve, and an open position, wherein the blocking component generally allows fluid to flow through the valve. The valve further including a float operatively coupled to the blocking component. The system additionally has an actuator that is operable to directly or indirectly move the blocking component to at least one of its open or closed positions to thereby enable testing of the overfill prevention valve.