Where system modifications are made and the piping cannot be isolated, such as relocated drops, nfpa 13 provides some flexibility and permits hydrostatic tests to be conducted at the system’s normal static pressure. To 31⁄2 in., 2 in Unless permitted by 24.2.1.2 through 24.2.1.8, all piping and attached appurtenances subjected to system working pressure shall be hydrostatically tested at 200 psi (13.8 bar) and shall maintain that pressure without loss for 2 hours.
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Hydrostatic testing newly installed sprinkler systems must be hydrostatically tested to check for leaks at a pressure of at least 200 psi (14 bar) for a period of at least 2 hours.
Learn how nfpa 25 requirements for hydrostatic testing have changed since 1992 and what the current requirements are to maintain compliance.
This document’s intent is to provide contractors with guidelines outlining the expectations and procedures for how the everett fire marshal’s office will conduct an acceptance test of a 13d fire sprinkler system. If no leaks are detected, begin to increase pressure with the test pump up to 200 psi or 50 psi in excess of the static pressure when static pressure exceeds 150 psi. This testing is known as “hydrostatic” testing because the pipe is filled with water and then pressurized.* nfpa®13, standard for the installation of sprinkler systems, requires that the hydrostatic test occur at a minimum of 200 psi (13.8 bar) and there can be no pressure loss for two hours. Approved drawing and aboveground piping certification documents are on site
Underground supply testing and flushing is witnessed by the city of mercer island underground utilities inspector and underground piping certification is provided test and materials certificate. A flow test is performed The main drain pipe is 3⁄4 in Or greater for a riser up to 2 in., 11⁄4 in
Or greater for a riser 21⁄2 in
