What is the maximum flow rate for a 3-star rated shower?

4.5 Litres per minute at a test pressure of 3 bar (Table 1).

What is the water consumption for a 3-star rated dual-flush WC?

3.0 Litres for a full flush and 1.5 Litres for a half flush (Table 2).

What does the star rating on a plumbing fixture mean?

It indicates the level of water efficiency. A higher star rating (e.g., 3-star) signifies lower water consumption and greater water savings.

Is this standard mandatory?

It is a voluntary standard, but is often a requirement for green building projects and may be specified by local authorities to promote water conservation.

IS 16183

: 2014

Water efficient plumbing products - Specification

CurrentFrequently UsedSpecificationBIMMEP · Green Building and Sustainability

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This standard specifies the requirements for water-efficient plumbing products like taps, showers, water closets, and urinals. It establishes a star rating system (1, 2, and 3 stars) based on water consumption to promote water conservation in buildings. The standard covers performance criteria, testing methods, and marking for these green plumbing fixtures.

Specifies performance requirements for various water-efficient plumbing products to minimize water consumption in buildings.

Quick Reference Values

Maximum flow rate for 3-star Tap3.8 L/min

Maximum flow rate for 3-star Shower4.5 L/min

Maximum water consumption for 3-star Dual Flush WC (Full/Half)3.0 / 1.5 L

Maximum water consumption for 3-star Urinal0.5 L/flush

Standard test pressure for flow rate measurement3.0 bar

Practical Notes

This standard is crucial for projects aiming for green building certifications like IGBC or GRIHA, where water efficiency points are significant.

Always verify the product has the BIS Standard Mark and the star rating marked on it for compliance.

The specified flow rates are at a test pressure of 3 bar; actual performance may vary with site water pressure.