Mermade 30" x 36" Centre Bottom Outlet, Complete

The Mer-Made 30" × 36" Center Bottom Outlet Complete Vacuum DE Filter Leaf Assembly is a standard commercial drop-in replacement element engineered for commercial vacuum DE filter vaults, institutional natatoriums, water parks, and municipal surge-tank filtration arrays.

This orientation measures 30" wide horizontally across the base by 36" high vertically, placing the effluent discharge drop spud centrally along the 30" bottom horizontal rail. It delivers 15.0 sq. ft. of active filtration surface area per septum, providing a balanced vertical-to-horizontal aspect ratio that fits standard-depth concrete or fiberglass commercial filter pits.

Technical Specifications & Dimensions

Structural Architecture & Construction Details

• Bi-Directional Drainage Matrix: High-rigidity, open-profile polypropylene or ABS drainage core engineered to withstand continuous negative vacuum draw up to 15" Hg without face deflection. Internal diagonal and vertical rib channels direct water evenly from the 36" height down toward the central bottom discharge hub.

• Reinforced Perimeter Framing: Heavy-wall extruded rigid CPVC/PVC outer border channels with thermo-welded corner miter joints. Designed to resist twist, lateral racking, and warping across the 30" base under hydraulic surge cycles.

• Molded Center-Bottom Hub: Injection-molded, chemical-resistant Schedule 80 PVC spud thermo-welded directly to the center of the 30" bottom rail. Includes an integral locating stop shoulder to set the insertion depth into the floor manifold receiver and ensure uniform compression on the felt gasket.

• Factory-Fitted Septum Jacket: Rot- and chlorine-resistant woven monofilament or multifilament polypropylene fabric bag calibrated for 20–30 micron diatomaceous earth pre-coat retention. Features a reinforced cutout collar centered on the 30" bottom rail and a heavy-duty commercial Velcro hook-and-loop flap across the 30" top rail.

Physical Dimensions & Weight Estimates

• Individual Complete Leaf Net Weight: Approximately 13.0 to 15.5 lbs (5.9 to 7.0 kg).

• Single Boxed Leaf Shipping Weight: Approximately 19.0 to 23.0 lbs (8.6 to 10.4 kg) in heavy-duty corrugated cartons with perimeter edge protectors.

• Commercial Grid Lot (10 to 20 Leaves): Approximately 210 to 360 lbs (95 to 163 kg) freight-strapped to a standard 40" × 48" wooden pallet.

Field Installation & Manifold Seating Guidelines

1. Clean Floor Manifold Receivers: Flush and wire-brush the floor header receiver bushings to remove calcified DE powder, mineral scale, and grit.

2. Mount Compression Felt: Slide a fresh high-density felt compression collar (Part # FELTCOLLAR) over the center-bottom spud until seated flush against the molded locating shoulder.

3. Engage Manifold: Lower the leaf vertically into the vault, aligning the 30" bottom rail's center spud with the floor receiver socket. Press firmly downward on the upper rail until the felt collar compresses evenly against the header bushing face.

4. Lock Hold-Down System: Position the overhead structural hold-down bar across the 30" top rail, verify vertical alignment across adjacent leaves to maintain uniform bank spacing, and tighten the hold-down tie rods.