What is the minimum working pressure specified for a sewer jetting machine?

A minimum working pressure of 8.5 MPa (or 85 kg/cm²) is required as per Table 1.

What type of pump is specified by this standard?

The standard specifies a positive displacement reciprocating plunger pump (Clause 5.3).

Is there a minimum water tank capacity mentioned?

No, the capacity of the tank is to be agreed upon between the purchaser and the supplier (Clause 5.2.1), though typical capacities range from 4000 to 8000 litres.

What are the key safety requirements for the machine?

Key safety features include a pressure relief valve, an unloader valve, an emergency engine stop control, and proper guarding for all rotating parts (Clause 7).

IS 11387

: 1985

Requirements for high-pressure jetting machine for sewer cleaning

CurrentSpecializedSpecificationWater Resources · Public Health Engineering

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This standard specifies the requirements for materials, construction, components, and performance of high-pressure water jetting machines used for cleaning sewer lines. It covers key components like the water tank, high-pressure pump, engine, and hoses. The code also outlines safety features and testing procedures to ensure the machine's effectiveness and operational reliability.

Requirements for high-pressure jetting machine for sewer cleaning

Quick Reference Values

Minimum Working Pressure8.5 MPa (85 kg/cm²)

Minimum Water Flow Rate (Typical)125 litres/min

Pump Type SpecifiedPositive displacement reciprocating plunger pump

Minimum High Pressure Hose Length120 m

Minimum Engine Power (Typical)40 kW

Hose Inner Diameter20 mm or 25 mm

Practical Notes

Ensure the chosen machine meets the minimum pressure (8.5 MPa) and flow rate for the intended application, as specified in Table 1.

The water tank capacity is not fixed by the standard; it must be agreed upon between the purchaser and supplier based on the vehicle chassis and operational needs.

Verify that all safety features, especially the pressure relief valve and emergency stops (Clause 7), are present and functional before deploying the machine.