IS 2556:2020 Part 3 is the Indian Standard (BIS) for vitreous sanitary appliances (vitreous china) - water closets (european type). This standard specifies the material, dimensional, constructional, and performance testing requirements for floor-mounted and wall-hung European type vitreous china water closets.
Covers requirements for vitreous china European type water closets.
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
! Trap seal depth must be carefully checked on site (minimum 50 mm) to prevent the ingress of foul odors from the drainage system.
! Wall-hung WCs require compatible concealed cisterns and sturdy mounting frames (chair brackets) capable of withstanding point loads (usually tested to 400 kg as per Part 1).
! Always verify the S-trap or P-trap outlet diameter and orientation before casting slabs or core cutting to ensure proper alignment with soil pipes.
Frequently referenced clauses
vitreous chinaceramic
International Equivalents
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International Comparison — Coming Soon
We're adding equivalent international standards for this code.
Key Values5
Quick Reference Values
standard full flush volume6 Litres
standard half flush volume3 Litres
minimum water seal depth50 mm
general tolerance for dimensions above 75mm± 5%
standard height of floor mounted WC bowl390 mm to 400 mm
Tables & Referenced Sections
Key Tables
Table 1 - Dimensions of Floor Mounted European Water Closets
Table 2 - Dimensions of Wall Hung European Water Closets
Key Clauses
Clause 4 - Manufacture and Finish
Clause 5 - Dimensions and Tolerances
Clause 6 - Construction
Clause 7 - Performance and Testing
Frequently Asked Questions3
Does this standard cover the plastic toilet seat and cover?+
No, plastic toilet seats and covers are specified separately under IS 2548.
What is the minimum water seal depth required for EWCs?+
A minimum water seal depth of 50 mm is required.
What are the common flushing tests required by this standard?+
Performance is verified using standardized flushing tests including the toilet paper test, sawdust test, and plastic ball test.
QA/QC Inspection Templates
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QA/QC templates coming soon for this code.