Hydrostatic tests help building owners, inspectors, and installers confirm that fire sprinkler or standpipe systems will work well under pressure. A proper hydrostatic test starts with a pump that can generate the correct pressure. When selecting a hydrostatic testing pump, remember the following three tips. They will ensure your pump works correctly every time you use it.

Selecting the Right Pump

Hydrostatic testing is a plumbing leak detection method that involves filling and pressurizing pipes with water and observing the results. The test helps ensure a system is structurally sound and can withstand the pressure during operation. A successful hydrostatic test pump depends on accurate testing methods and the right pump. Hydro-test pumps are designed to generate a certain level of pressure that can be monitored and measured using specialized gauges. The manufacturer specifies the pump’s maximum test range, as in its technical specifications.

A key feature of any hydro test pump is a shut-off switch that can close the water flow when the test is complete or when a problem occurs. Most models also include supply and outlet hoses designed to withstand high-pressure levels. During the test, these hoses connect the test pump to the fire sprinkler or standpipe system. The pumps also feature pressure gauges that are easy to read and accurate.

Performing the Test

The hydrostatic test differs slightly depending on the type of vessel under inspection. Still, the basic goal is to examine the strength of the container to identify leaks or weak spots. The container is filled with water at a level up to 1.5 times its designed pressure limit, and the test technician monitors the test and records pressure regularly on a chart recorder (or digitally) throughout the test.

The testing process requires that all the pipes and fittings be properly installed and sealed, so if the pump isn’t functioning properly or there’s an obstruction in the hose or filter, it can dramatically affect the hydrostatic test results. A home plumbing system can also be tricky to test because the lines go in different directions under your house. It’s important to have a qualified professional conduct the test and isolate small sections of your drain line system for testing purposes.

Choosing the Right Fluid

Performing hydrostatic plumbing tests on your home is an effective way to find hidden leaks under your slab foundation. But your test results depend on a few factors, including the pump you pressurize the system. During hydrostatic testing, the piping is filled with water and then pressurized to 1.5X its maximum allowable working pressure. Then, the system is monitored for any visible or measurable leaks during a set amount of time.

Air must be removed from the system before the test begins, as air entrapment can lead to inaccurate pressure readings and even damage the vessel or system under testing. Proper venting techniques must be used to ensure the appropriate air removal.

It is a common test to verify the integrity of meter skids, compressed gas cylinders, boilers, tubing and pipelines. It’s also a crucial process for DOT-required containers to test their ability to hold and maintain pressure.

Recording the Results

Having the right equipment and following proper test procedures is essential for a successful hydrostatic test. Keeping a close eye on the pressure gauge and stopping the test if the pressure reaches dangerous levels or if leaks appear is also crucial.

Another variation on hydrostatic testing is the water jacket test, where the vessel under test is placed inside a water-filled container. It mitigates risks by reducing the force exerted on the ship. The volume of the vessel is then measured both when under pressure and when depressurized. The ship is deemed unfit if the permanent expansion exceeds the under-pressure expansion.

Hydrostatic tests help builders, inspectors, and installers confirm that piping systems will hold up to their intended use. Proper pump operation ensures accurate results, allowing inspection professionals to focus on the bigger picture and achieve operational efficiencies. For example, using the right hydrostatic tester during home plumbing inspections can help identify leaky pipes so they can be fixed before a house purchase.