Hydrostatic Test

Published: May 21, 2017 | Last updated: July 5, 2023

What Does Hydrostatic Test Mean?

A hydrostatic test is defined as a pressure test carried out in sewer lines and water mains to check for leaks and efficiency. Trenchless technology is used to repair or rehabilitate pipes that are found to be leaking. Leaks are a common problem in old buildings with cast iron sewer pipelines which deteriorate over time due to corrosion or develop cracks which then begin to leak.

Trenchlesspedia Explains Hydrostatic Test

Hydrostatic testing is carried out on a system upon installation or to determine if there is a problem in the pipeline. The procedure begins as the main line sewer cleanout is first blocked by inflating a plug to restrict the flow within the pipe. The sewer lines, or water main, are then filled with water up to the slab level. Once the lines are filled, the water level is observed for approximately 20 minutes. If the system fails to fill to the slab level, or the water level starts dropping, it indicates a leak in the sewer line. Once the leak is confirmed, leak detection equipment is required to locate the leak. Trenchless rehabilitation methods are used to repair or replace these pipes with minimal surface disruption.

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