IS 2556:2020 Part 6 is the Indian Standard (BIS) for vitreous sanitary appliances (vitreous china) - sinks and tubs. This standard lays down the material, dimensional, constructional, and finish requirements for vitreous china sinks (including laboratory and kitchen sinks) and wash tubs. It ensures uniform manufacturing standards, proper fitment of drainage accessories, and functional durability.
Specifies requirements for vitreous china sinks and tubs.
Overview
- Status
- Current
- Usage level
- Specialized
- 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
! Always read this standard in conjunction with IS 2556 (Part 1) which dictates the general material and testing requirements for all vitreous sanitary appliances.
! Verify the waste hole and overflow dimensions carefully on site, as variations in ceramic shrinkage can occasionally cause fitting issues with standard metallic waste couplings.
! BIM modelers should account for the standard tolerances specified, as sanitary fixtures require adequate clearance for installation and sealing.
Frequently referenced clauses
vitreous chinaceramics
International Equivalents
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International Comparison — Coming Soon
We're adding equivalent international standards for this code.
Key Values4
Quick Reference Values
waste hole diameter65 mm
tolerance dimension under 75mm± 3 mm
tolerance dimension 75mm and above± 4 percent
minimum thickness of vitreous china6 mm
Tables & Referenced Sections
Key Tables
Table 1 - Dimensions of Laboratory Sinks
Table 2 - Dimensions of Wash Tubs
Key Clauses
Clause 4 - Dimensions and Tolerances
Clause 5 - Construction and Design
Clause 6 - Finish and Glazing
Clause 7 - Sampling and Criteria for Conformity
Frequently Asked Questions3
What material requirements apply to the sinks and tubs covered here?+
They must be manufactured from vitreous china conforming to the general quality and testing requirements specified in IS 2556 (Part 1).
Are the dimensions specified exact?+
No, vitreous china shrinks during the firing process. Permissible tolerances (typically ± 4% for dimensions 75mm and above) must be accommodated.
Does this standard cover stainless steel kitchen sinks?+
No, this part exclusively covers sinks and tubs made from vitreous china (ceramics). Stainless steel sinks are covered under different IS codes.
QA/QC Inspection Templates
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QA/QC templates coming soon for this code.