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IS 7231 : 2021

Plastic flushing cisterns for water closets and urinals - Specification (third revision)

Current edition: 2021

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

What this standard covers

This standard covers requirements for manually operated dual-flush plastic flushing cisterns of capacities 6/3 litres, 4.8/2.8 litres and 4/2 litres for water closets (WC) including squatting pans and urinals, together with flush pipe details. 1.2 This standard does not cover ceramic (vitreous China) flushing cisterns and close-coupled cisterns, which are covered in IS 774 and IS 2556 (Part...

Scope, quoted from IS 7231 : 2021. Read the full standard

Requirements and tests, as the standard names them

  • 7.1 Flushing Arrangement
  • 7.2 Working Water Level
  • 7.4 Reduced Water Level
  • 7.5 Discharge Capacity
  • 7.6 Discharge Rate
  • 8.1 Distortion Resistance Test
  • 8.2 Dead Load Test
  • 8.3 Front Thrust Test
  • 8.4 Impact Test
  • 9.1 Test for Discharge Capacity
  • 9.2 Test for Discharge Rate
  • 9.3 Endurance Test

Sub-clause names as printed under the headings “OPERATIONAL AND PERFORMANCE”, “SPECIAL REQUIREMENTS”, “TESTING PROCEDURE” in IS 7231 : 2021. Values and limits are deliberately not reproduced here — read them in the standard itself.

How the standard is organised

  • 4 MATERIALS
  • 5 CONSTRUCTION
  • 6 FINISH
  • 7 OPERATIONAL AND PERFORMANCE
  • 8 SPECIAL REQUIREMENTS
  • 9 TESTING PROCEDURE
  • 11 SUPPLY CONDITIONS
  • 12 OPERATING INSTRUCTIONS
  • 13 ADDITIONAL REQUIREMENTS FOR WATER EFFICIENCY

Edition history (per the BIS registry)

  • IS 7231 : 2021 — current edition
  • IS 7231 : 1994 — withdrawn by BIS

Where this standard is used on NirmanDost

Plain-language DSR recipes

Find IS 7231 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  • Status and titles come from the official BIS published/withdrawn standards registry (standards.bis.gov.in exports, July 2026 snapshot).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.