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ACO SuDS Swale Inlet Technical data ACO Water Management: Civils + Infrastructure ACO SuDS Swale Inlet

ACO SuDS Swale Inlet

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Page 1: ACO SuDS Swale Inlet

ACO SuDS Swale Inlet

Technical data

ACO Water Management: Civils + Infrastructure

ACO SuDS Swale Inlet

Page 2: ACO SuDS Swale Inlet


Aesthetically pleasing SuDSinterface

In comparison to traditional in-situstructures and concrete headwalls, the lowprofile unit provides a natural lookinginterface between proprietary and vegetateddrainage solutions, complementing thesurrounding environment.

The consistent product appearance makesthe product ideal for phased or retrofitinstallation, and the 1 in 3 gradient profilecan be used to help construct swales tosatisfy the CIRIA C697 guidance (DesignCriteria for Swales).

Erosion protection

The surface finish and the flared outlet ofthe unit encourages water dispersion andreduces excessive flow velocities - helpingto protect the surrounding environmentfrom erosion and meeting the flow rateguidance in CIRIA C697. The ACO SuDSSwale Inlet will reduce the velocity anddistribute the flow across a footprint up to6 times that of a traditionally constructedpipe outfall.

As part of a system to manage the flowrate and volume of surface water run-off,the ACO SuDS Swale Inlet reduces therisk of localised flooding and easespressure on the drainage network.

Shallow surface water conveyance

The ACO SuDS Swale Inlet can beintegrated into any SuDS drainage schemewhere there is a requirement to managewater on or near the surface, helping tomanage surface water at its source.

Simplified installation

The one piece unit is placed into positionand can be installed using concretebedding or, alternatively secured withspiral ground anchors.

No additional on-site shuttering orformwork is required, removing the needto return to site and ensuring the finalstages of a project can be concludedquickly and without hassle.

Introduction to ACO SuDS Swale Inlet

The ACO SuDS Swale Inlet unit provides an aesthetically pleasing solution when linking proprietaryconveyance drainage systems to vegetated infiltration features such as swales, basins, ponds andwater courses.

ACO SuDS Swale Inlet

The ACO SuDS Swale Inlet ismanufactured from Vienite®, ACO’s highstrength sustainable material which offersgreater durability when compared totraditional materials and structures whichare likely to deteriorate in service. Theproperties of the material allow virtuallyno water absorption giving protectionagainst frost and freeze-thaw cycles, thusmaintaining the long term performance ofthe unit.

ACO SuDS Swale Inlet is available asstandard in three colours to suit projectrequirements: natural, grey and black.

An optional textured finished can also beapplied to the unit if required.

When installed in applications thatrequire a greater degree of protectionsuch as schools or playing fields, anoptional stainless steel grating can beapplied to the upper inlet area to protectpedestrians and maintenance equipment.

The ACO SuDS Swale Inlet simplifiesinspection, with easier identification ofblockages, and maintenance proceduresare straightforward due to the simplified,consistent design of the outlet.

Page 3: ACO SuDS Swale Inlet

4 Aesthetically pleasing interfacebetween proprietary and vegetateddrainage features

4 Consistent appearance complementssurrounding environment

4 Helps protect local area from erosion

4 Reduces excessive velocities andencourages water dispersion

4 Complies with flow rate guidance inCIRIA C697

4 Reduces the risk of localised floodingand pressure on the drainage network

4 Cost effective alternative to traditionalin-situ structures and pre castconcrete headwalls

4 Offers durable, long term performance

4 Simplifies installation and removesunnecessary costs

4 Straightforward inspection andmaintenance


Why choose ACO SuDS Swale Inlet?

Inlet connection: Ø160mm singlewall or Ø150mm twinwall pipe

Fixing points for ground anchors or concrete haunching

Flared outlet aids alignmentand water dispersion

One piece design

Low profile design allowsmaintenance equipmentto safely pass over unit

Surface finish reducesflow velocities

Flat base for level installation

Made fromsustainable,robust, thermallystable materials

1 in 3 profile design satisfies CIRIA C697and can be used for construction of swales

Can reduce the erosion rate toa quarter of that of a standardpipe (CIRIA R116)

Distributes the flow of waterto 6 times the area of astandard pipe

Features overview

Page 4: ACO SuDS Swale Inlet






1 in 3 to suit CIRIA C697

42mm (Ground cover)

Section A-A









Ø150mmTwinwall pipe

Ø160mmsingle wall pipe

Ø160mm - Ø110mm adapterwith Ø110mm single wall pipe

Inlet pipe sizes









Technical data

ACO SuDS Swale Inlet

ACO SuDS Swale InletProductcode







ACO SuDS Swale Inlet - Grey

ACO SuDS Swale Inlet - Natural

ACO SuDS Swale Inlet - Black

Grating kit*

Anchor Kit+







Width overall(mm)


















*Grating kit contains 1 x Grade 304 Stainless Steel mesh grating (mesh size is 42mm), 3 x anchors, 3 x washers and 3 x fixing screws+ Ground Anchor kit contains 2 x ground anchors, 2 x washers and 2 x bolts

NaturalGrey Black

Colour options

Optional extras

An optional textured finish and stainlesssteel grating is available.

Picture shows textured finished appliedto black ACO SuDS Swale Inlet

Page 5: ACO SuDS Swale Inlet

51.0 Ground conditions:

The Customer should ensure that theground conditions are suitable for theproposed installation detail. Engineeringadvice may be necessary.

2.0 Watertight joints:

Where a secure watertight joint isrequired between the pipework and theSuDS Swale Inlet unit, a suitableproprietary sealant should be used.

3.0 Surface protection

The installer should ensure that theadjacent ground level is higher than theSuDS Swale Inlet unit to avoid damage tothe unit during installation or mowingactivities.

4.0 Optional mesh grating and groundanchors

These are available for retrofit and typicalinstallations. The anchors are installed byknocking them into the ground throughthe holes in the units; see detail A.

5.0 Handling

Please ensure suitable safe liftingtechniques are used when positioningand installing the unit.

Installation detail

An electronic version of the ACO SuDS Swale Inlet installation detail isavailable to download from the ACO website. Visit www.aco.co.uk


1 in 3 to suit CIRIA C697




Ø160mm single wall or Ø150mmtwinwall pipe pushed flush into the swale inlet

Pipe cover suitable for site conditionsEngineer to specify

Suitable bedding to achieve a stable footing - specific to site requirementsEngineer to specify

Designed water level to be below the outlet of the swale inlet

Swale inlet positioned horizontally within the swaleThe top face to be flush with the swale

1 in 3 gradient swale designed in accordance with CIRIA C697Deviations from this fall to belocally contoured to suit


SuDS Swale Inlet

Spiral GroundAnchors (option)

mesh grating (option)

Detail A

Page 6: ACO SuDS Swale Inlet


ACO SuDS Swale Inlet

The swale inlet shall be ACO SuDS Swale Inlet as supplied by ACO Technologies plc. All materials and components within the scopeof the system shall be supplied by this manufacturer.

The ACO SuDS Swale Inlet units shall be 1150mm (L) x 580mm (W) x 365mm (D) with a 1 in 3 gradient profile in accordance withCIRIA C697 (Design Criteria for Swales). The ACO SuDS Swale Inlet Unit shall be of one piece construction of Grey/Natural/Blackcoloured Vienite®. Vienite is a polymeric based recycled material, which contains post-consumer waste previously destined for landfillin the UK.

The units shall be installed with the manufacturer’s grating and ground anchor kits as required for the scheme. The ACO SuDS SwaleInlet system shall be installed in accordance with the manufacturer’s printed recommendations, and the works carried out as specifiedon drawings (*) and in accordance with recognised good practice.

† Please delete as applicable.*Please insert drawing number relevant to the project.


PC21233 April 2014

ACO Water Management: Civils + InfrastructureA division of ACO Technologies plc, ACO Business Park, Hitchin Road,Shefford, Bedfordshire SG17 5TETel: 01462 816666 Fax: 01462 815895e-mail: [email protected] website: www.aco.co.uk

Shallow surface water conveyance

The ACO SuDS Swale Inlet can beintegrated into any SuDS drainage schemewhere there is a requirement to managewater on or near the surface. Managingsurface water at the source allied withshallow surface water conveyance canhelp to reduce the risk of flooding andalleviate pressure on the drainage network.

The ACO SuDS Swale Inlet unit providesan aesthetically pleasing solution whenlinking proprietary conveyance drainagesystems to vegetated infiltration featuressuch as swales, basins, ponds and watercourses. This combined solutionencourages plant growth and providesincreased amenity and biodiversity to thesurrounding environment.

Depending on the application, ACOmanufactures a wide range of surfacewater drainage systems which can simplybe connected to the ACO SuDS SwaleInlet. The images below demonstrate howACO surface water conveyance systemscan be applied to landscaped andhighway applications.

Landscaped environment

ACO MultiDrain™ MD connected toan ACO SuDS Swale Inlet toprovide surface water conveyance.

Highway environment

ACO KerbDrain® connected to anACO SuDS Swale Inlet to providesurface water conveyance.