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IS 8931 : 2021

Copper alloy single taps, combination tap assemblies, stop valves and single lever mixers for water services — Specification (second revision)

Current edition: 2021

Sectional committee: CED 03 · BIS department: Civil Engineering (CED)

What this standard covers

This standard lays down the requirements regarding materials, manufacture, workmanship, construction, dimensions, finish and testing of nickel-chromium plated copper alloy non-rising spindle type single pillar and bib taps, combination tap assemblies, stop valves and single lever mixers suitable for operation from 0.05 MPa to 0.5 MPa pressure at maximum temperature of 65 *C.

Scope, quoted from IS 8931 : 2021. Read the full standard

Requirements and tests, as the standard names them

  • 10.2 Water Tightness Characteristic
  • 10.3 Pressure Resistance Characteristic
  • 10.4 Hydraulic Characteristics (Flow Rate)
  • 10.5 Mechanical Strength Characteristics
  • 10.6 Mechanical Endurance Characteristics

Sub-clause names as printed under the heading “PERFORMANCE REQUIREMENTS” in IS 8931 : 2021. Values and limits are deliberately not reproduced here — read them in the standard itself.

How the standard is organised

  • 4 CLASSIFICATION AND NOMINAL SIZES
  • 5 MATERIAL
  • 6 MANUFACTURE, WORKMANSHIP AND CONSTRUCTION
  • 7 DIMENSIONS
  • 7 WASHER
  • 9 FINISH
  • 10 PERFORMANCE REQUIREMENTS
  • 11 ADDITIONAL REQUIREMENTS FOR WATER EFFICIENCY
  • 12 SAMPLING AND CRITERIA FOR CONFORMITY

Edition history (per the BIS registry)

  • IS 8931 : 2021 — current edition
  • IS 8931 : 1993 — withdrawn by BIS

Where this standard is used on NirmanDost

Plain-language DSR recipes

Find IS 8931 on the official BIS portal All IS codes used on NirmanDost

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Notes

  • Status and titles come from the official BIS published/withdrawn standards registry (standards.bis.gov.in exports, July 2026 snapshot). Editions change — verify on the BIS portal before contractual use.
  • The standard text is copyright BIS. NirmanDost shows registry metadata and links to the official source only — it never rehosts the document.
  • Generated 2026-07-27.