Flush-enabled controlled flow drain

A method of controlling a drain flow, comprising:

• receiving the drain flow into an upper flange coupled to a lower flange, the upper flange defining an inlet and the lower flange defining an exit;
• centralizing the drain flow into an inlet cavity defined within the upper flange;
• segregating debris within the drain flow from a swirl nozzle defined within a swirl nozzle plate, the swirl nozzle providing fluid communication between the inlet cavity and a swirl chamber defined in the lower flange;
• accelerating the drain flow through the swirl nozzle to generate a vortical fluid flow that forces dense debris within the drain flow to a radially outer extent of the swirl chamber;
• accumulating the dense debris within an annular groove fluidly coupled to the swirl chamber and defined within the lower flange;
• and
• draining the drain flow from the lower flange via an exit control passage.

A controlled flow drain, comprising:

• an upper flange coupled to a lower flange, the upper flange defining an inlet fluidly coupled to an upper drain pipe, and the lower flange defining an exit fluidly coupled to a lower drain pipe;
• an inlet cavity fluidly coupled to the inlet;
• a swirl chamber fluidly coupled to the exit;
• a swirl nozzle plate disposed between the inlet cavity and the swirl chamber and having a debris fence coupled thereto, the debris fence being disposed within the inlet cavity;
• a swirl nozzle defined within the swirl nozzle plate and providing fluid communication between the inlet cavity and the swirl chamber;
• an annular groove defined within the lower flange and in fluid communication with the swirl chamber, the annular groove having a curved radius defined about its upper periphery where the annular groove meets the swirl chamber;
• and
• an exit control passage defined within the lower flange and in fluid communication with the exit and the lower drain pipe.