BS Cast-in-place
Filter Plate

A monolithic reinforced concrete filter plate poured in place in the filter tank, with the filter nozzle sockets set out in the formwork and embedded during the pour — one continuous filter floor for water and air distribution, with no joints between separate plates.

Request a Quote Technical Details

Cast-in-placeMethod

MonolithicStructure

EmbeddedNozzle sockets

On requestPlate thickness

BS cast-in-place filter plate with embedded filter nozzle sockets

Method

Cast-in-place concrete

Nozzle sockets

Embedded during casting

Joints between plates

None

Plate thickness

On request

Nozzle grid

On request

Why this filter plate

One slab, no joints,
aligned nozzles

Cast-in-place construction removes the inter-plate joints and the plate-by-plate levelling that assembled precast filter bottoms require — the two details that need the most attention on an air-scour filter floor.

Monolithic filter bottom

The plate is poured as one continuous slab in the filter tank, so the nozzle deck has no joints between plates to seal and no individual plates to level and re-level after backwash.

Embedded nozzle sockets

Sockets are set out and fixed to the formwork before the pour, so they are cast in at the design grid spacing and at a common level; nozzles are fitted into the cast-in sockets after curing and can be replaced one by one.

Built for air-scour duty

The slab is reinforced for water backwash and air-scour loads and cast continuous around the tank perimeter, so the filter bottom works as a single structural element instead of separate plates that can lift or rock.

Specifications

Technical parameters

Product type	Cast-in-place (monolithic) concrete filter plate with embedded filter nozzle sockets
Construction	Formwork, reinforcement and nozzle sockets installed in the filter tank, then concrete poured in place and cured
Plate thickness	On request — confirmed against the tank and design load
Concrete grade	On request
Reinforcement	On request
Nozzle socket type	On request
Nozzle grid / spacing	On request
Tank plan dimensions	On request — cast to your filter tank drawing
Perimeter joint / waterstop	On request
Surface finish & level tolerance	On request
Filter nozzles	Supplied separately — ABS tower or mushroom type, long and short handle
MOQ / price	On request — confirm drawing, quantity & destination

Applications

Where it fits

Rapid gravity filtersV-type filter bottomsBiological aerated filters (BAF)Denitrification filtersActivated carbon contactorsIron & manganese removal filtersWaterworks filter upgradingMunicipal & industrial tertiary filtrationSeawater pre-treatment filters

Product gallery

See the plate up close

Cast-in-place filter plate surface with embedded filter nozzle sockets

Filter plate detail showing the nozzle socket arrangement

Close-up of a cast-in nozzle socket opening in the filter plate

Top-down view of the cast-in-place filter plate nozzle deck

Finished cast-in-place filter plates stacked in the plant area

Casting preparation with reinforcement and preset filter nozzle sockets

Steel formwork and casting face for a cast-in-place filter plate

Cast-in-place filter plate bottom installed in a filter tank

Filter nozzles fitted into a cast-in-place filter plate

Cast-in-place filter plate surface used for water and air distribution

Batch of cast-in-place filter plates in the factory yard with workers

Stock of finished cast-in-place filter plates

Send your tank drawing and nozzle grid

Send the filter tank plan, nozzle type and grid spacing, plate thickness and design load — we will confirm the casting arrangement, the nozzles to match and the export packing.

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

BS Cast-in-place
Filter Plate