Mermade 30" x 60" Centre Bottom Outlet, Complete

The Mer-Made 30" × 60" Center Bottom Outlet Complete Vacuum DE Filter Leaf Assembly is an extended vertical-span commercial drop-in replacement element engineered for high-capacity municipal competition pools, 50-meter Olympic natatoriums, water park wave pools, and deep surge-tank vacuum filtration arrays.

This format measures 30" wide horizontally across the base by 60" high vertically (a full 5-foot vertical reach), placing the effluent discharge drop spud centrally along the 30" bottom horizontal rail. Delivering 25.0 sq. ft. of active filtration area per septum, this assembly optimizes floor-space packing density in deep concrete or fiberglass vaults where horizontal floor run is constrained but tank depth permits tall vertical leaves.

Technical Specifications & Dimensions

Structural Architecture & Construction Details

• 5-Foot Vertical Drainage Matrix: Heavy-duty, open-profile polypropylene or ABS drainage core engineered to withstand continuous negative vacuum loads up to 15" Hg without face collapse or hydraulic throttling across the 60" height. Internal rib pathways funnel filtrate smoothly down from the top header and diagonally from the perimeter inward toward the central bottom outlet port.

• Columnar Reinforced Perimeter Framing: Heavy-wall extruded rigid CPVC/PVC outer border channels with thermo-welded corner miter joints. The 60" vertical side stiles are engineered with enhanced wall thickness and internal corner gussets to eliminate bowing, twisting, and racking under wet cake loading (which can exceed 30+ lbs of wet DE cake per leaf).

• Molded Center-Bottom Hub: Heavy injection-molded Schedule 80 PVC spud thermo-welded directly to the center of the 30" bottom rail. An integrated locating stop shoulder sets uniform insertion depth into the floor manifold receiver and ensures square, positive compression on the sealing collar.

• 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 factory-reinforced circular cutout collar centered on the 30" bottom rail and a heavy-duty commercial Velcro hook-and-loop closure flap across the 30" top rail.

Physical Dimensions & Weight Estimates

• Individual Complete Leaf Net Weight: Approximately 18.0 to 21.5 lbs (8.2 to 9.8 kg).

• Single Boxed Leaf Shipping Weight: Approximately 26.5 to 31.5 lbs (12.0 to 14.3 kg) in oversized, double-wall corrugated cartons with perimeter edge and corner protectors.

• Commercial Grid Lot (10 to 20 Leaves): Approximately 280 to 480 lbs (127 to 218 kg) freight-strapped and banded to an extended 34" × 66" wooden pallet.

Field Installation & Manifold Seating Guidelines

1. Clean Floor Manifold Receivers: Flush and wire-brush the floor header receiver bushings to clear accumulated calcified DE powder, mineral scaling, 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 5-foot leaf vertically into the vault using two installers (or overhead hoist equipment), 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 beam across the 30" top rail, verify vertical plumb across adjacent leaves to maintain uniform bank clearance (preventing DE cake bridging across the full 60" vertical run), and tighten the hold-down tie rods.