PS40-TM Low Pressure Test Module The PS40-TM is the industry’s FIRST AND ONLY completely pre-assembled low pressure test module for dry pipe and pre-action systems. The PS40-TM provides a fast and foolproof way to confirm the system meets the requirement of NFPA 72, 2007, 220.127.116.11 and to perform the test required by NFPA 25, 2007, 18.104.22.168.6. The PS40-TM also eliminates any possibility of accidentally tripping the dry pipe valve during testing. Closing the BVL bleeder valve isolates the PS40 Supervisory Pressure Switch and pressure gauge from the air source while exhausting the supervisory air pressure between the bleeder valve and the PS40. This can save hours of time waiting for pressure to bleed down then build back up, as is the case in the old conventional testing method.
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