Underdrain apparatus
An underdrain apparatus includes one or more underdrain blocks and an anchor assembly that includes one or more support members. Each of the underdrain blocks includes a top wall, a bottom wall, a pair of opposing side walls, a pair of opposing end walls, and a center separation wall that extends between the pair of opposing end walls. The center separation wall of at least one of the underdrain blocks may have one or more apertures formed therein, the apertures configured to receive at least one of the support members. One or more of the side walls of the pair of opposing side walls of the underdrain blocks may have one or more side clips. At least one of the side clips defines an aperture for receiving a support member.
1. An underdrain apparatus for placement on a floor surface of a filter comprising:
an anchor assembly, the anchor assembly comprising one or more support members; and
one or more underdrain blocks configured to be disposed on the floor surface, each of the one or more underdrain blocks comprising:
a top wall;
a bottom wall defining a bottom surface configured to be placed on the floor surface;
a pair of opposing side walls;
a pair of opposing end walls, the pair of opposing side walls and the pair of opposing end walls together connecting the top wall and the bottom wall;
a center separation wall that extends substantially vertically between the top wall and the bottom wall and between the pair of opposing end walls, the center separation wall dividing the underdrain block into two longitudinal halves, the center separation wall further protruding upwardly beyond a top surface of the top wall to define a top end of the center separation wall; and
one or more apertures that extend substantially vertically through the underdrain block from the top end of the center separation wall to the bottom surface of the bottom wall, at least one of the apertures structurally configured to receive at least one of the support members, the one or more support members being configured to be secured to the floor surface on which each of the underdrain blocks are disposed.
2. The underdrain apparatus of claim 1 , comprising one or more means for securing the support members to the floor surface, the one or more means for securing the support members comprises an adhesive.
3. The underdrain apparatus of claim 1 , wherein the center separation wall of the at least one of the underdrain blocks comprises an aperture formed therein at a position substantially equidistant from each end wall of the pair of opposing end walls.
4. The underdrain apparatus of claim 1 , wherein the center separation wall of the at least one of the underdrain blocks comprises two apertures formed therein at opposing ends of the center separation wall.
5. The underdrain apparatus of claim 3 , wherein the one or more support members comprises a U-rod that extends through each of the two apertures formed at the opposing ends of the center separation wall.
6. The underdrain apparatus of claim 1 , the center separation wall of the at least one of the underdrain blocks having at least one aperture that extends substantially through an entire height of the center separation wall, the height of the center separation wall extending in a direction substantially perpendicular to a direction in which the center separation wall extends between the pair of opposing end walls.
7. The underdrain apparatus of claim 1 , the center separation wall of the at least one of the underdrain blocks having at least one aperture that is integrally formed as part of the center separation wall.
8. The underdrain apparatus of claim 1 , wherein the one or more support members comprises an anchoring rod.
9. The underdrain apparatus of claim 8 , wherein the anchoring rod comprises a proximal end and a distal end, the distal end penetrating a floor surface of an underdrain filter.
10. The underdrain apparatus of claim 9 , wherein the proximal end of the anchoring rod is secured to the at least one underdrain block using at least one of a washer, a nut, and a locknut.