What is the maximum working pressure these plastic taps are designed for?

The maximum nominal working pressure is 0.6 MPa (or 6 kgf/cm²), as specified in the scope (Clause 1.1).

What is the difference between Class 1 and Class 2 taps?

Class 1 is suitable for both hot and cold water services, while Class 2 is intended for cold water services only (Clause 4.3).

How many on/off cycles must a bib tap withstand to pass the endurance test?

A bib tap or pillar tap must successfully complete 200,000 cycles in the endurance test as per Table 2.

What thread standard is used for these plastic taps?

Pipe threads must conform to IS 554, with common nominal sizes being 15 mm (1/2") and 20 mm (3/4") (Clause 6.2 and Table 1).

IS 9763

: 2000

Plastics Bib Taps, Pillar Taps, Angle Valves and Stop Valves for Hot and Cold Water Services

CurrentFrequently UsedSpecificationBIMMEP · Sanitary Appliances and Water Fittings

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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

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

Endurance Test Cycles (Stop Valves)20,000 cycles

Thermal Shock Test Temperature (Class 1)90 ± 2 °C

Maximum Hot Water Temperature (Class 1)90 °C

Maximum Cold Water Temperature (Class 2)45 °C

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.