Pre-assembled flow control structured and related media filtration system

1. A stormwater filtration system, comprising:

a stormwater containment structure including a concrete floor and a pre-assembled flow structure embedded in the concrete floor, the pre-assembled flow structure including an inlet compartment housing, an outlet compartment housing, at least one filter conduit connected to the inlet compartment housing and the outlet compartment housing and in flow communication with the interior of the outlet compartment housing, at least one bypass conduit extending from the inlet compartment housing to the outlet compartment housing for delivering water from the interior of the inlet compartment housing to the interior of the outlet compartment housing;

a plurality of filter units connected to the filter conduit so that stormwater filtered by the filter units passes into the filter conduit and then to the interior of the outlet compartment housing.

2. The stormwater filtration system of claim 1 wherein at least one filter unit has a portion extending over a top of the inlet compartment housing.

3. The stormwater filtration system of claim 2 wherein at least one filter unit has a portion extending over a top of the outlet compartment housing.

4. The stormwater filtration system of claim 3 further comprising at least one filter unit connected atop the outlet compartment housing to deliver filtered stormwater to the interior of the outlet compartment housing without entering the filter conduit.

5. The stormwater filtration system of claim 1 wherein the pre-assembled flow structure is formed of plastic, the inlet compartment housing includes an upper wall at an elevation proximate an upper surface of the concrete floor, the upper wall having first and second spaced apart inlets, the first inlet having a cover placed thereon, the second inlet connected to an upwardly extending inlet flow structure.

6. The stormwater filtration system of claim 5 wherein the inlet flow structure includes (i) a bypass orientation that directs stormwater flowing into the containment structure and into the interior of the inlet compartment housing so as to travel along the bypass conduits to the interior of the outlet compartment housing without filtering by the filter units and (ii) a filtering orientation that blocks stormwater flowing into the containment structure from entering the interior of the inlet compartment and traveling along the bypass conduit.

7. The stormwater filtration system of claim 1 wherein the outlet compartment housing includes an upper wall at an elevation proximate an upper surface of the concrete floor, the upper wall having multiple filter unit connection openings with respective filter units connected thereto to deliver filtered stormwater into the interior of the outlet compartment housing.

8. A flow assembly for use in forming a floor of a stormwater filtration chamber for containing multiple filter units, the flow assembly comprising:

a first housing forming a stormwater inlet compartment;

a second housing forming a stormwater outlet compartment;

a plurality of filter conduits, each filter conduit having:

a first end connected to the first housing in a manner that prevents stormwater from flowing from the inlet compartment into the first end;

a second end connected to the second housing in a manner that permits stormwater to flow from the second end into the outlet compartment,

a plurality of filter connection structures extending upwardly from the filter conduit;

a plurality of bypass conduits, each having:

a first end connected to the first housing in a manner that permits stormwater to flow from the inlet compartment into the first end;

a second end connected to the second housing in a manner that permits stormwater to flow from the second end into the outlet compartment.

9. The flow assembly of claim 8 wherein the first housing further includes multiple inlet openings in an upper wall thereof.

10. The flow assembly of claim 9 wherein the second housing includes multiple outlet openings in an upper wall thereof.

11. The flow assembly of claim 10 wherein the second housing includes multiple filter connection point openings.

12. The flow assembly of claim 10 , further comprising:

an inlet flow structure extending upwardly from one of the inlet openings;

an outlet overflow structure extending upwardly from one of the outlet openings.

13. The flow assembly of claim 8 wherein each of the first housing, second housing, filter conduits and bypass conduits is formed of plastic.

14. A method of manufacturing a stormwater filtration chamber, comprising:

(a) producing a flow assembly having:

a first housing forming a stormwater inlet compartment;

a second housing forming a stormwater outlet compartment;

at least one filter conduit having a first end and a second end, the first end connected to the first housing in a manner that prevents stormwater from flowing from the inlet compartment into the first end, the second end connected to the second housing in a manner that permits stormwater to flow from the second end into the outlet compartment, the filter conduit further including a plurality of filter connection structures extending therefrom;

at least one bypass conduit having a first end and a second end, the first end connected to the first housing in a manner that permits stormwater to flow from the inlet compartment into the first end, and the second end connected to the second housing in a manner that permits stormwater to flow from the second end into the outlet compartment;

(b) embedding the flow assembly in concrete to produce a floor for the filtration chamber.

15. The method of claim 14 wherein, in step (b), an upper wall of the first housing is left exposed and an upper wall of the second housing is left exposed.

16. The method of claim 14 wherein the upper wall of the first housing and the upper wall of the second housing are each substantially flush with an upper surface of the floor defined by concrete.

17. The method of claim 14 wherein step (b) is performed by precasting the floor at a first location, and the method includes the step of transporting the floor to an installation location.

18. The method of claim 17 wherein the floor is integrated with a wall structure prior to the transporting step.

19. A stormwater treatment system, comprising:

a stormwater containment structure including a floor;

a pre-assembled flow control structure that forms at least part of the floor, the pre-assembled flow control structure including an inlet portion, an outlet portion and a treatment region extending between the inlet portion and the outlet portion, the treatment region including a filter conduit for directing filtered stormwater toward the outlet portion;

filter cartridges connected to the filter conduit and in communication therewith so that filtered stormwater exiting the filter cartridges flows into the filter conduit and is directed toward the outlet portion; and

at least one filter cartride connected to the pre-assembled flow control structure at the inlet portion or the outlet portion.

20. The stormwater treatment system of claim 19 , wherein the pre-assembled flow control structure has an initial configuration where stormwater bypasses the filter cartridges and a filtering configuration where stormwater is filtered by the filter cartridges, the pre-assembled flow control structure being configurable from the initial configuration to the filtering configuration.

21. The stormwater treatment system of claim 20 further comprising a bypass conduit for directing unfiltered stormwater from an inlet reservoir at the inlet portion toward the outlet portion.

22. The stormwater treatment system of claim 21 , wherein the bypass conduit includes no filter assemblies connected thereto.

23. The stormwater treatment system of claim 20 , wherein the pre-assembled flow control structure includes an inlet reservoir housing including an inlet reservoir and an outlet reservoir housing including an outlet reservoir at the outlet portion, the outlet reservoir being in communication with the filter conduit.

24. The stormwater treatment system of claim 23 , wherein a filter assembly is connected directly to the outlet reservoir housing.

25. The stormwater treatment system of claim 23 , wherein a filter assembly is connected directly to the inlet reservoir housing.

26. The stormwater treatment system of claim 23 , wherein, with the pre-assembled flow control structure in its initial configuration, stormwater flows directly into the inlet reservoir from an inlet of the containment structure, through the filter conduit and into the outlet reservoir without entering the filter cartridges.

27. The stormwater treatment system of claim 19 , wherein the stormwater containment structure includes an inlet through which stormwater enters the stormwater containment structure, the pre-assembled flow control structure including an inlet conduit arranged and configured to receive stormwater from the inlet and direct the stormwater to the inlet portion.

28. The stormwater treatment system of claim 19 , wherein the stormwater containment structure includes an inlet through which stormwater enters the stormwater containment structure, the pre-assembled flow control structure including a dissipator structure arranged and configured to receive stormwater from the inlet and direct the stormwater toward the filter cartridges to filter the stormwater.

29. A stormwater treatment system, comprising:

a stormwater containment structure including a concrete floor and a pre-assembled flow control structure embedded in the concrete floor, the pre-assembled flow control structure including an outlet compartment housing including an upper wall extending between side walls of the outlet compartment housing, the upper wall at an elevation proximate an upper surface of the concrete floor, at least one filter conduit in communication with an interior of the outlet compartment housing; and

a plurality of filter assemblies connected to the filter conduit so that filtered water flows from the filter assemblies, into the filter conduit and toward the interior of the outlet compartment housing.

30. The stormwater treatment system of claim 29 , wherein at least one filter assembly has a portion extending over the upper wall of the outlet compartment housing.

31. The stormwater treatment system of claim 30 further comprising at least one filter assembly connected atop the outlet compartment housing to deliver filtered stormwater to the interior of the outlet compartment housing without entering the filter conduit.

32. The stormwater treatment system of claim 29 , wherein the pre-assembled flow control structure is formed of plastic, the upper wall having multiple filter assembly connection openings with respective filter assemblies connected thereto to deliver filtered stormwater into the interior of the outlet compartment housing.