Shaped granite sewer stones for sewer downspouts, connecting chambers, etc. are produced for extreme loads in the most exposed places of urban sewers, precisely tailored, most often from Czech granite, which with a margin meets the requirements of the standards ČSN EN 13383–1, ČSN EN 1469, ČSN EN 1341, ČSN EN 1467, ČSN EN 1468 and previous standards ČSN 721810, ČSN 721820, ČSN 721860 and former industry standards.
Shaped and facing sewer stones must meet the technical requirements of the network administrator, e.g. Municipal Standards for Water Supply and Sewerage Facilities of the City of Prague.
