5 Ways Remote Operating Vehicles Are Changing Water Tank Inspections

1. There is no down time for water availability

In a typical drain down inspection, a water tank is taken out of service while the inspection team enters the bowl. This requires wasting water which would otherwise be used by local residents. It also requires providing residents an alternative means of water (continuous pumping or temporary water source), and requires the tank to be disinfected for AWWA compliance prior to returning to service. With an ROV, the water tank can remain in service.

2. They help conserve water

Tank inspection with a dive crew often involves removing some of the water for sediment removal or complete water removal for a drain down inspection. Removing water is costly and time consuming. ROVs can operate inside a tank, regardless of how much or how little water is left in it.

3. ROVs are cost effective

As mentioned above, there is no need to hire a costly dive team, or remove tank water. On a typical elevated water storage tank evaluation, savings can be up to 50 percent when using an ROV instead of a dive team. When your consultant owns its own ROV equipment, the cost savings can be substantial.

4. ROV inspections are more timely

For cities with multiple tanks, using an ROV creates the opportunity to inspect up to three tanks in one day. Using a dive team means only one inspection per day. In addition, waiting for dive team takes time, but so does waiting for their reports. A typical wait for reports once a dive team completes an inspection is up to 30 days. After that, the consultant combines its findings and the dive team report before submitting to a client. Using an ROV streamlines the reporting process as it’s done by one entity.

“With the ROV we can come in and do a complete inspection in a couple of hours,” says Zienty. “Before, the process would take nearly a full day. We can also turn around a report within a couple of days.”

5. They allow for peace of mind

A good consulting team operating an ROV is made up of NACE International (NACE) and American Welding Society (AWS) certified personnel trained in providing water tower inspection services.