4" Voda Filter — DXF-Native Simulation

Design Rainfall

Intensity 75 mm/hr

Selangor 100-yr ARI 5-min ≈ 305 mm/hr

Roof area 46.5 m²

≈ 500 sq.ft · clay tile · 28° pitch

Runoff coeff. C 0.90

Wire Mesh Specifications

Inner Mesh Filtration

MaterialSS 304 Mesh count60 # Wire gauge37 SWG Wire Ø0.173 mm Pitch0.423 mm Open area35 %

Aperture 0.25 mm (250 µm)

Outer Mesh Structural

MaterialSS 304 Mesh count5 # Wire Ø~1.6 mm Pitch5.08 mm Open area47 % Aperture~3.48 mm

Filter Geometry (from DXF)

Body OD / ID117 / 105 mm

Top EPDM throatØ 77 mm

Top EPDM slant45° × 13 mm

Mesh OD × L88 × 82 mm

Bottom EPDM H68.67 mm

SS rings (×2)5 mm each

Harvest outletØ 67.5 mm

Central voidØ 67.5 mm

Visualisation

Velocity field Particle trails Dimension labels

Rain (inlet)

Inside mesh column

Through mesh → harvest

Bypass → central void → waste

Live Output

Scenario inflow

52L/min

medium rain · 75 mm/hr

Harvest → tank

—L/min

Waste → drain

—L/min

Filter efficiency

—%

Equivalent Units

Inflow

—L/s · —m³/hr

Harvest yield

—L/s · —m³/hr

Filtration Cut-off

Particles > 250 µm

Trapped on inner mesh

Catches sand, silt, larger particulates. Bacteria (~1 µm) and dissolved minerals pass through.

Particle Tally

Released

→ Harvest

→ Waste

Capture — Medium Rain

Scenario medium rain
75 mm/hr · 52 L/min inflow
Capture η 84 – 91 %
(higher in light rain, lower in heavy storms — contact-time effect)