Investigation and assessment of drain and sewer systems outside buildings - Visual inspection coding system1 Scope This European Standard is applicable to the investigation and assessment of drain and sewer systems outside buildings. It is applicable to drain and sewer systems, which operate essentially under gravity, from the point where the wastewater leaves a building or roof drainage system, or enters a road gully, to the point where it is discharged into a treatment works or receiving water. Drains and sewers below buildings are included provided that

BS EN 50121-3-1 provides compatibility tests that are specified according to the kind of signalling and communication systems employed

Safety assurance services

Using BS EN 1395-6 is a step towards providing your customers with high-quality finishes on products

2 Ropes of reference number less than 14

The performance levels and categories can be applied to safety-related parts of control systems

BS EN 62148-5 specifies the optical and electrical interface of fibre optic devices

ISO 9241-6

for use in aircraft electrical systems

BS 5597 discusses standards for non-refillable plastics aerosol dispensers

so that it can be used for its intended purpose

by referencing only their black box generation and use

Manufacturers of water storage cisterns