The GRAF MAKO (Mako Shark / EcoProtect) is a hydrodynamic separator for stormwater pretreatment. A tangential inlet creates rotational flow so solids drop into a hydraulically isolated sludge trap and floatables stay at the surface. Treated water rises the outer ring, collects over a serrated weir, and exits with no inlet or outlet height difference.

The Australian catalogue covers about 1,200 m² to 35,000 m² connected catchment (30 to 875 L/s treatment flow) in Class D / SLW 60 concrete shafts. Cover and accessories are not included. Specify Vario connection angles, internal bypass, microplastic deflector or a flow regulator on project enquiry.

Key features

No height difference between inlet and outlet; the system cannot clog
Greater than 94% TSS removal (particle size d50 = 122 μm)
Greater than 98% mineral-oil hydrocarbon and light-liquid retention (DIN EN 858-1)
Greater than 99% microplastic removal with optional deflector
IKT-tested AFS63 retention on 750, 1000, 1500, 2000, 2500 and 3000 diameters
Online installation: scour-tested at twice treatment flow, no extra bypass chamber required
Class D / SLW 60 concrete shaft with surface access for inspection, suction and flushing
AU sizes from about 1,200 m² (30 L/s) to 35,000 m² (875 L/s)

Operating principle

The teacup effect drives denser particles toward the centre while oil collects above the weir. Flow breakers isolate sludge so it is not remobilised in a storm.

Tangential inlet into the separator
Teacup effect: solids settle, floatables stay at the surface
Isolated sludge trap with flow breakers and grating
Even rise along the outer ring
Serrated weir into the annular chamber, preventing short-circuit flow
Outlet with no elevation difference; cannot clog

Variants

Standard MAKO: physical TSS removal in a standard manhole or custom vault
MAKO Vario: factory inlet and outlet at any angle for existing pipe alignments
MAKO Bypass: project-specific internal bypass, adjustable 15 or 25 L/(s·ha) overflow
Microplastic deflector: removable screens behind the weir for tyre wear, pellets and sports-surface fibres
Optional flow regulator to limit downstream discharge from the same chamber

Maintenance

Large central sludge chamber and three accessible sediment chambers
Central access from above; full visual inspection of the system
Suction and flushing from outside with a standard vacuum truck
No confined-space entry, no biofilm deposits and no camera inspection required

Standards and testing

NJCAT verified and NJDEP certified for TSS removal
DWA-A 102 / DWA-A 102-2 design reliability for discharge to surface water
DIN EN 858-1 light liquid retention greater than 98%
SQIDEP (Australia), BWCoP (UK) and VSA (Switzerland)
IKT-tested AFS63: 750 49.9%, 1000 47.4%, 1500 48.0%, 2000 48.7%, 2500 47.3%, 3000 47.51%

Treatment systems

Size a treatment train