Effluent Collection

Stainless Steel
Collection Trough

A sheet-metal trough that takes clarified water off a settling tank, clarifier or filter cell evenly across its full width. Supplied in stainless steel 304 in two working forms — a V-notch weir crest for uniform overflow, or a perforated wall for filter-floor collection — folded and welded to your basin drawing.

Request a Quote Technical Details

V-notch · perforatedWorking forms

Stainless steel 304Material

Made to orderLength

On requestPrice

Stainless steel collection troughs with V-notch weir crests and stiffener ribs

Product

Effluent collection trough

Material

Stainless steel 304

Crest

V-notch weir

Fabrication

Made to drawing

Price

On request

Why this collection trough

Even take-off,
level crest

Collection is a hydraulic problem, not a metalwork problem. The trough has to sit at one level along its whole length, present the same opening to the water everywhere, and carry the flow away without backing up — otherwise the basin short-circuits and the far end does the settling.

One level across the basin

The trough is set to a single crest level along its full length, so the overflow is taken evenly instead of concentrating near the outlet. Adjustable brackets and slotted supports let the crest be trimmed on site once the basin is filled.

Weir crest or perforated wall

For settling tanks and clarifiers the crest carries a row of V-notches, which keep the overflow steady and measurable over a range of flows. For filter cells the wall is perforated instead, so filtrate, backwash water or wash air is collected through the openings along the trough.

Stainless steel, folded and welded

Stainless steel 304 needs no coating, resists the corrosion of treated and backwash water, and is stiff enough to span a basin without sagging. Stiffeners, end plates and support brackets are welded in place, and the whole trough is fabricated to your dimensions rather than cut down from a stock size.

Specifications

Technical parameters

Parameter	Value
Product	Collection trough (effluent collection channel) for settling tanks, clarifiers and filter cells
Working forms	V-notch (triangular) weir trough · perforated trough
Material	Stainless steel 304; an ABS version is produced for the same duty
Fabrication	Folded sheet, welded, with welded stiffeners; end plates, branch outlets and support brackets on request
Cross-section	On request — set by the basin width, the design flow and the outlet arrangement
Length	On request — made to the tank drawing; long runs are supplied in bolted or welded sections
Plate thickness	On request
Notch pitch, depth & angle	On request — set by the weir loading and the head available over the crest
Perforation diameter & pitch	On request — set by the design flow through the trough
Support & fixing	Brackets, embedded plates, support legs or stool supports — to the basin drawing, on request
Surface finish	Mill / pickled finish as standard; other finishes on request
MOQ / price	On request — confirm the basin drawing, material, quantity & destination

Dimensions, plate thickness, notch or hole layout and support details are project-specific: they are confirmed against your basin drawing before the order is released, and are therefore quoted On request rather than fixed on this page.

Applications

Where it fits

Settling tanksPrimary & secondary clarifiersLamella (inclined tube) basinsMunicipal water treatment plantsFilter cells & backwash collectionDenitrification filtersTertiary treatmentIndustrial wastewaterEffluent overflow weirsBasin and tank retrofits

Product gallery

See the trough up close

Four stainless steel collection troughs with V-notch weir crests on a white background

Single stainless steel collection trough with a V-notch weir plate and stiffeners

Stainless steel collection trough product view showing the weir crest and end plate

Stainless steel collection trough photographed for the product catalogue

Collection trough with a V-notch weir installed in a settling basin

Rows of V-notch collection troughs installed across a large tank group

Perforated collection troughs laid in rows across a basin under construction

Stainless steel collection troughs installed under a shade net at a treatment plant

Stainless steel collection trough folded and welded in the fabrication workshop

Finished stainless steel collection troughs on the workshop floor

Stainless steel collection troughs stacked at the factory

Detail of the perforated wall and stiffeners of a stainless steel collection trough

More filter-floor equipment

Flap Filter Bread Pipe

U-section filter pipe

Concrete Filter Plate

Precast nozzle deck

Denitrification Filter Brick

Air & water distribution block

ABS Filter Nozzle

Plate-mounted distribution

Send us your basin drawing

Basin length and width, the design flow or weir loading, the water level you want to hold and the outlet position are enough for us to confirm the section, notch or hole layout, material and export packing — and to quote.

Request a QuoteNo obligation · response within 24h (working days)

Stainless SteelCollection Trough

Even take-off,level crest