An inspection event number refers to the number allocated to an inspection event for a sewer line or a sewer system. With the advent of trenchless technology for rehabilitating sewer systems, it has become easier to access pipelines located in remote corners.
Inspection of sewer lines is carried out using video inspection methods such as closed-circuit television camera (CCTV), push rod cameras and axial cameras.
市政污水管道系统的检查out by government-authorized sewer inspectors. Each inspection is allocated a number in order to facilitate identification of a particular system in case of repairs to be carried out at a later date. It also prevents re-inspection of already inspected pipelines thus saving time and cost by preventing rework.
There are various requirements laid down by municipal authorities requiring video inspection of sewer and laterals prior to issuance of a building permit.
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