IS 2556:2020 Part 1 is the Indian Standard (BIS) for vitreous sanitary appliances (vitreous china) - general requirements. This standard lays down the general requirements for material, manufacture, glazing, permissible defects, dimensional tolerances, and physical performance characteristics of vitreous china sanitary appliances.
Covers general requirements, dimensions, and testing of vitreous china sanitary appliances.
Overview
- Status
- Current
- Usage level
- Frequently Used
- Domain
- MEP — Plumbing Fixtures and Valves
- Type
- Specification
Also on InfraLens for IS 2556
BIM-relevant code. See the BIM Hub for ISO 19650, IFC, and LOD/LOIN frameworks used alongside it.
Practical Notes
! This is a general standard (Part 1) and must always be read in conjunction with the specific product standard (Parts 2 to 17) for exact dimensions and shapes of individual appliances.
! Visual inspection for surface blemishes (such as spots, pinholes, or blisters) should be conducted under daylight or equivalent lighting from a distance of 600 mm.
! Strict adherence to the 0.5% maximum water absorption limit is critical to prevent the sanitary ware from absorbing sewage water, which leads to odor and hygiene issues.
Frequently referenced clauses
vitreous chinaceramicssanitary wareglaze
International Equivalents
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International Comparison — Coming Soon
We're adding equivalent international standards for this code.
Key Values7
Quick Reference Values
water absorption max0.5 % by mass
modulus of rupture min60 MPa
crazing test steam pressure0.34 MPa
crazing test duration10 hours
tolerance up to 44mm± 2 mm
tolerance above 44mm± 5 %
visual inspection distance600 mm
Tables & Referenced Sections
Key Tables
Table 1 - Permissible Defects and Blemishes
Table 2 - Dimensional Tolerances
Key Clauses
Clause 4 - Material and Manufacture
Clause 5 - Glazing
Clause 6 - Defects and Blemishes
Clause 7 - Tolerances
Clause 8 - Performance Requirements (Water Absorption, Crazing, Modulus of Rupture)
Frequently Asked Questions4
What is the maximum permissible water absorption for vitreous china sanitary appliances?+
The water absorption shall not exceed 0.5 percent of the dry weight of the test piece.
What are the standard dimensional tolerances for these appliances?+
Unless specified otherwise in specific parts, tolerances are ±2 mm for dimensions up to 44 mm, and ±5 percent for dimensions above 44 mm.
What is the minimum modulus of rupture required?+
The modulus of rupture of the vitreous china material must not be less than 60 MPa.
How is the crazing test performed?+
The sample is subjected to an autoclave test at a steam pressure of 0.34 MPa for 10 hours and then immersed in a dye solution to check for surface cracks (crazing).
QA/QC Inspection Templates
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QA/QC templates coming soon for this code.