IS 5513 specifies vitreous china wash basins and pedestals. ISI mark is mandatory for sanitaryware sold in India. The standard covers wall-hung, pedestal, counter-top, and semi-recessed types. Water absorption must be <0.5% (vitreous grade).
Specification for vitreous china wash basins and pedestals for domestic and commercial use covering types, dimensions, quality, and testing requirements.
Key Values
Water absorption max0.5%
Standard basin width550mm typical
Standard basin depth430mm typical
Practical Notes
! ISI mark is mandatory for vitreous china sanitaryware sold in India.
! Water absorption <0.5% is the defining property of vitreous china — higher absorption means it is 'stoneware' not 'vitreous'.
! Check for crazing (fine cracks in glaze) — indicates firing defect and will worsen over time with staining.
! For commercial projects, specify Grade A (no visible defects from 1m). Grade B is acceptable for concealed areas.