The Althon 225mm Swale Inlet Headwall is a swale and pond fibre reinforced precast concrete open inlet allowing surface water runoff to enter SUDS features, or to act as an outlet or overflow. This swale inlet is designed for pipework up to and including 225mm.

The profile of the inlet 1:3 (18 Degrees) is the same as the surrounding ground in accordance with guidelines for the construction and adoption of swales and ponds. There is a recess formed in either side to key the unit into the slope of the swale or pond and prevent it slipping.

Our  225mm swale inlet connects to pipework with a 225mm twinwall stub cast into the unit. The unit is fitted with a hinged 25mm grille which is available in mild steel galvanised after manufacture as standard or stainless steel to order. The grilles are fixed to the inlet with 4 No anti-tamper bolts, when the bottom two bolts are removed the grating hinges for ease of maintenance. The grating is located in an 8mm deep recess in the face of the unit to protect it from damage during routine maintenance of the surrounding area.

The 225mm Swale Inlet can be factory fitted with a 225mm inline non – return valve such as a Wastop if required

If you require any assistance or more information please contact us by phone on 01603 488700 or by email

Althon Swale Inlet Headwall-225 line drawing
Product Name
Max Pipe Opening PCC
Max Pipe Opening Plastic / C'ware
Backwall Height
Approx Headwall Weight (kg)
Althon Swale Inlet Headwall-225

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    Althon Swale Inlet Headwall-225

    SWALE-POND INLET 225MM + Wastop Dn225

    Althon Swale Inlet Headwall-225 + Toe

    SWALE-POND INLET 225MM + Toe + Wastop Dn225


    Datasheet and Installation Instructions for Althon Swale Inlet Headwall-225

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