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IS 9763:2000 is the Indian Standard (BIS) for plastics bib taps, pillar taps, angle valves and stop valves for hot and cold water services. This standard specifies the requirements for materials, dimensions, construction, and performance of plastics bib taps, pillar taps, angle valves, and stop valves for hot (Class 1) and cold (Class 2) water services. It aims to ensure durability, leak-proof performance, and interchangeability for fittings used up to a maximum working pressure of 0.6 MPa.
Plastics Bib Taps, Pillar Taps, Angle Valves and Stop Valves for Hot and Cold Water Services
BIM-relevant code. See the BIM Hub for ISO 19650, IFC, and LOD/LOIN frameworks used alongside it.
Practical Notes
! Always verify the 'Class' marking: Class 1 for hot & cold water, Class 2 for cold water only. Using a Class 2 tap in a hot water line will lead to failure.
! Plastic threads can be easily damaged by over-tightening. Use PTFE tape and hand-tighten first, followed by a maximum of one to two turns with a wrench.
! For outdoor installations, select products made from UV-stabilized materials or provide adequate shielding from direct sunlight to prevent degradation and brittleness over time.
Suitability of non-metallic materials and products for use in contact with water intended for human consumption with regard to their effect on the quality of the water - Part 1: Specification
Specifies material safety in contact with drinking water, a requirement covered within IS 9763 but not a full product performance standard.
Key Differences
≠Endurance (lifecycle) requirements are significantly different. IS 9763 requires up to 200,000 cycles, whereas ASME A112.18.1 mandates 500,000 cycles for kitchen/lavatory faucets, and AS/NZS 3718 requires 50,000 cycles.
≠IS 9763 is more prescriptive regarding material types (e.g., ABS, PP-H, PP-R), referencing specific Indian Standards. In contrast, standards like ASME A112.18.1 are more performance-based, allowing any material that meets specified performance and non-toxicity tests (like NSF/ANSI 61).
≠The thermal stability test in IS 9763 requires 500 cycles of alternating hot (85°C) and cold (15°C) water, while the equivalent test in AS/NZS 3718 is ten times more stringent at 5,000 cycles.
≠IS 9763 defines two classes (Class 1 and Class 2) with different pressure ratings and endurance requirements within the same standard, a classification not typically found in the international equivalents.
Key Similarities
≈All standards have a similar fundamental scope, covering taps and valves intended for sanitary use with hot and cold potable water services.
≈Core performance tests are conceptually identical, including hydrostatic pressure tests for body integrity, leak tests for sealing components, and operational torque tests to ensure ease of use.
≈All standards include mandatory requirements to ensure materials in contact with water are non-toxic and do not adversely affect water quality, although the test methods and referenced standards (e.g., IS 9845 vs NSF 61) differ.
≈Each standard specifies criteria for flow rate performance to ensure functional water delivery, though the reference pressures and specific rates vary.
Parameter Comparison
Parameter
IS Value
International
Source
Hydrostatic Pressure Test
1.0 MPa (Class 1) / 1.5 MPa (Class 2) for 1 min
1500 kPa (1.5 MPa) for 60 s
AS/NZS 3718:2021
Endurance (Lifecycle) Test
100,000 (Class 1) / 200,000 (Class 2) cycles
500,000 cycles (for faucet control mechanism)
ASME A112.18.1-2018
Endurance (Lifecycle) Test - Alternative
100,000 (Class 1) / 200,000 (Class 2) cycles
50,000 cycles
AS/NZS 3718:2021
Thermal Stability / Shock Test
500 cycles (alternating 85°C and 15°C water)
5,000 cycles (alternating hot and cold water)
AS/NZS 3718:2021
Operating Torque
Max 2.5 Nm
Varies by handle type, e.g. ≤ 4.5 Nm for cross handle, ≤ 1.5 Nm for lever (for opening/closing)
EN 200:2008
Minimum Flow Rate (Low Pressure)
0.1 L/s (6 L/min) at 0.05 MPa (0.5 bar) for DN 15/20
≥ 0.1 L/s (6 L/min) at 0.1 MPa (1.0 bar) for Flow Rate Group Z
EN 200:2008
⚠ Verify details from original standards before use
Key Values7
Quick Reference Values
Maximum Nominal Working Pressure0.6 MPa (6 kgf/cm²)
Hydrostatic Test Pressure (Leakage Test)1.0 MPa (10 kgf/cm²)
Endurance Test Cycles (Bib/Pillar Taps)200,000 cycles