What is the standard working pressure for these connectors?

The nominal working pressure is 1.0 MPa (10 bar) as per Clause 7.1.

What information must be marked on the hose?

The hose must be marked with the manufacturer's name or trademark, nominal bore, and the BIS Standard Mark (ISI mark) as per Clause 9.

What is the burst pressure requirement?

The connector must withstand a minimum burst pressure of 2.5 MPa without rupturing, as specified in Table 2.

Are these connectors suitable for hot water?

Yes, they are suitable for temperatures up to 90°C as per the thermal cycling test in Table 2.

IS 15320

: 2003

Flexible Connections for Plumbing Systems - Specification

CurrentFrequently UsedSpecificationBIMMEP · Plumbing Fixtures and Valves

Download PDF BIS Portal Google

This standard specifies requirements for materials, dimensions, construction, and performance testing of flexible connections for plumbing. It covers braided hoses used to connect water supply lines to fixtures like taps, mixers, and WC cisterns in residential and commercial buildings.

Specifies requirements for flexible hose connections used in plumbing systems for sanitary appliances and taps.

Quick Reference Values

Nominal working pressure1.0 MPa (10 bar)

Maximum working temperature90 °C

Hydrostatic pressure test requirement1.5 MPa for 2 min without leakage

Minimum burst pressure requirement2.5 MPa

Common nominal bore sizes8 mm, 10 mm, 13 mm

Water tightness pressure test1.5 MPa

Practical Notes

Avoid twisting the hose or creating sharp bends during installation to prevent damage to the inner tube and restriction of flow.

Ensure end fittings are tightened by hand first and then given a final quarter-turn with an appropriate wrench to avoid over-tightening and damaging the seal.

Always check for the BIS Standard Mark (ISI mark) on the product and its packaging for quality assurance and compliance.