Mermade 30" x 36" Centre Bottom Outlet, Leaf Only

The Mer-Made 30" × 36" Center Bottom Outlet — Leaf Only (cataloged as the Bare Leaf, Skeleton, or Core Assembly) consists of the fully assembled rigid structural perimeter frame, internal high-flow drainage grid, and center-bottom discharge hub, excluding the fabric filter jacket (cover) and compression felt sealing collar/gasket.

This configuration is engineered for commercial vacuum DE filter vaults, institutional natatoriums, water parks, and municipal surge-tank filtration arrays measuring 30" wide horizontally across the base by 36" high vertically. It is specified when existing fabric jackets are being reused or sourced from bulk stock, or when replacing cracked, bowed, or calcified PVC frames while maintaining the existing 15.0 sq. ft. per-leaf filtration capacity.

Technical Specifications & Scope of Delivery

• Internal open-matrix polypropylene or ABS vertical/diagonal drainage grid core

• Molded, chemical-resistant center-bottom discharge hub with integrated stop shoulder | | Excluded Components | • Fabric filter bag / cloth jacket (Cover Only)

• Top closure hardware, laces, or Velcro flap

• High-density felt compression collar (Part # FELTCOLLAR) |

Structural Design & Internal Core Mechanics

• Converging Flow Drainage Matrix: A high-rigidity, open-profile polypropylene or ABS drainage core with structural cross-ribs engineered to resist negative vacuum collapse under draw up to 15" Hg. The internal drainage channels converge bilaterally from the upper 36" corners down toward the central bottom outlet port.

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

• Molded Center Discharge Hub: Injection-molded, chemical-resistant Schedule 80 PVC spud thermo-welded directly to the center of the 30" bottom rail. An integrated locating stop shoulder establishes uniform seating depth in the floor manifold receiver and ensures proper compression on the sealing gasket.

Physical Dimensions & Weight Estimates

• Individual Bare Leaf Net Weight: Approximately 11.0 to 13.0 lbs (5.0 to 5.9 kg).

• Single Boxed Leaf Shipping Weight: Approximately 16.5 to 20.0 lbs (7.5 to 9.1 kg) in heavy-duty corrugated cartons with perimeter edge protectors.

• Master Pallet Lot (10 to 20 Bare Frames): Approximately 175 to 310 lbs (79 to 141 kg) strapped to a standard 40" × 48" wooden skid.

Field Clothing & Installation Steps

1. Inspect Core Surface: Check the outer channel borders and bare grid faces for sharp burrs, rough weld beads, or cracks that could puncture a replacement fabric jacket during installation.

2. Slide the Cover: Slide the replacement fabric envelope down over the 36" height of the frame along the 30" width, guiding the reinforced center opening over the protruding bottom discharge spud.

3. Seat the Spud Cutout: Pull the reinforced collar of the cover snugly around the base of the outlet hub until seated flush against the molded locating shoulder without bunching or twisting.

4. Tension & Close: Pull the fabric upward evenly across the 30" × 36" face to eliminate wrinkles or bagging, then fasten the top closure flap (Velcro seam, clamp bar, or laces) across the 30" upper rail.

5. Mount Gasket & Seat: Slide a fresh high-density felt compression collar (Part # FELTCOLLAR) over the center spud against the locating shoulder. Guide the spud into the floor manifold receiver socket, apply firm downward pressure to compress the seal, and secure the overhead hold-down beam.