This standard prescribes the requirements for dimensions, physical properties, and testing of burnt clay bricks intended for use in the construction of sewers, manholes, and related drainage structures.
sewer bricks - Specification
Quick Reference Values
Standard dimensions190 x 90 x 90 mm or 190 x 90 x 40 mm
Minimum average compressive strength17.5 N/mm²
Maximum water absorption10% by weight
Efflorescence requirementNot more than 'Slight'
Practical Notes
Sewer bricks must have lower water absorption and higher density than standard building bricks to resist the corrosive nature of sewage.
Ensure frogs (if present) are filled completely with mortar to prevent localized accumulation of sewer gases or liquids.