Do I need a hydraulic certificate to maintain the water pipes in the property?

There is no simple hydraulic certificate in the employment certificate, and this certificate has never been issued.

The relevant post certificates include plumber's certificate and welder's certificate, and only plumbers can be found in mechanic's certificate.

Therefore, there is no certificate requirement for water conservancy projects in general property recruitment and maintenance hours. Of course, those who hold the certificate of plumber, technician or mechanic may be promoted to higher management positions.