What is the standard connection size for this dividing breeching?

The inlet is a 63 mm female instantaneous coupling, and the two outlets are 63 mm male instantaneous couplings (Clause 6.1 and IS 903).

What pressure must the body of the breeching withstand?

The body must withstand a hydrostatic pressure of 2.1 MPa (or 21 kgf/cm²) for 2.5 minutes without leakage or sweating (Clause 8.1).

What are the approved materials for a dividing breeching?

The primary materials specified are Leaded-Tin Bronze (Gunmetal) conforming to Grade LTB 2 of IS 318, or specific Aluminium Alloys conforming to Designation 4450 or 4225 of IS 617 (Clause 3).

How is the breeching tested for valve leakage?

With one outlet blanked off and the corresponding valve closed, a hydraulic pressure of 1.4 MPa is applied to the inlet for 1 minute; there should be no leakage through the closed valve seat (Clause 8.2).

IS 5131

: 2002

Dividing Breeching with Control for Fire Brigade Use -Specification

CurrentFrequently UsedSpecificationBIMFire Safety · Fire Fighting

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This standard specifies the requirements for materials, dimensions, construction, and performance of a dividing breeching with control. This device is used by fire brigades to split a single 63 mm water supply line into two individually controllable 63 mm outlets.

Dividing Breeching with Control for Fire Brigade Use -Specification

Quick Reference Values

Nominal size of inlet and outlets63 mm

Hydrostatic test pressure (body)2.1 MPa (21 kgf/cm²)

Seat water tightness test pressure1.4 MPa (14 kgf/cm²)

Working pressure0.7 MPa (7 kgf/cm²)

Maximum mass (Aluminium alloy version)4.5 kg

Maximum mass (Gunmetal version)9.0 kg

Practical Notes

Ensure the internal rubber sealing washers are in good condition and correctly seated to prevent leakage under high pressure.

The control cocks (valves) should operate smoothly by hand from fully open to fully closed positions without excessive force.

Always specify and procure breechings with the ISI mark to ensure they meet the mandatory performance and safety tests required for firefighting operations.