Flow splitting weir

1. A method of minimizing head loss in a filter system including a plurality of drop pipes, a plurality of filter cells including a filter media and having a maximum influent level, and a distribution box having a maximum influent level, a base, and a plurality of distribution cells, the method comprising:

positioning a first end of each of the plurality of drop pipes within one of the distribution cells such that the first end of the pipe is disposed within the distribution cell and defines a weir having a weir height;

positioning a second end of each of the pipes in fluid communication with one of the plurality of filter cells; and

supporting the distribution box such that the maximum influent level of the filter cells is above the base of the distribution box and below the maximum influent level of the distribution box.

2. A method of minimizing head loss in a filter system including a plurality of drop pipes, a plurality of filter cells including a filter media and having a maximum influent level, and a distribution box having a maximum influent level, a base, and a plurality of distribution cells, the method comprising:

positioning a first end of each of the plurality of drop pipes within one of the distribution cells such that the first end of the pipe is disposed within the distribution cell and defines a weir having a weir height;

positioning a second end of each of the pipes in fluid communication with one of the plurality of filter cells;

supporting the distribution box such that the maximum influent level of the filter cells is above the base of the distribution box and below the maximum influent level of the distribution box;

providing a plurality of adjusting sleeves having an uppermost edge;

coupling each of the adjusting sleeves to one of the plurality of drop pipes; and

vertically positioning the adjusting sleeve to define a weir at the uppermost edge.

3. The method of claim 1 , further comprising the step of at least partially submerging the distribution box within at least one of the plurality of filter cells such that the maximum influent level of the filter cells is above the base of the distribution box and below the maximum influent level of the distribution box.

4. A method of splitting a flow of influent between a plurality of filter cells including a filter media using a distribution box having a plurality of drop pipes, the method comprising:

disposing a first end of each drop pipe within the distribution box;

positioning the first ends of each drop pipe at a weir height such that the first ends of the drop pipes define a plurality of weirs within the distribution box;

disposing a second end of the pipe in fluid communication with one of the plurality of filter cells;

directing the flow of influent to the distribution box;

simultaneously splitting the flow and distributing the flow by passing a substantially equal portion of flow over each of the weirs, and passing the flow through the plurality of drop pipes to the filter cells.

5. The method of claim 4 , further comprising the steps of providing a plurality of movable adjusting sleeves each having an uppermost edge, coupling each adjusting sleeve to the first end of one of the drop pipes, and moving the adjusting sleeve to position the uppermost edge at the weir height.

6. The method of claim 4 , further comprising the steps of providing a plurality of closure valves, each selectively engageable with one of the plurality of drop pipes, and selectively engaging one of the closure valves with one of the drop pipes to prevent flow of influent therethrough.