Every fire sprinkler contractor will abide that a test and drain valve is a pretty handy device when installed in a fire sprinkler system. Its dual-purpose design enables system draining when that's needed while also aiding required testing, as the name implies. Every fire sprinkler contractor will abide that a test and drain valve is a pretty handy device when installed in a fire sprinkler system. Its dual-purpose design enables system draining when that's needed while also aiding required testing, as the name implies.
A Test and Drain is a type of valve with both a test function and express drain function. Kind of a ball valve and Inspector’s Test valve combination, except it is manufactured as one unit making it much more convenient. Its dual-purpose design enables system draining, when required, but also aids in required testing in sprinkler system complying NFPA requirements.
The compact, easy-to-use nature makes Test & Drain valves quite handy for the fire protection industry as they simplify the installation of the system by cutting out extra components. In comparison to a standard ball valve and an Inspector’s Test valve, a Test and Drain means lower cost, fewer parts, easier installation, and thus offer multiple uses.
Test and drain valves serve the installation and maintenance applications of wet pipe fire sprinkler systems. Wet pipe systems are undoubtedly the most reliable name in the fire sprinkler segment. They are used for their simplistic design and consistent functionality. Other systems like dry or deluge have unique benefits but require more equipment, which provides more potential for system failures and shortcomings. Because of this, the majority of test and drains are built to meet the needs of wet fire sprinkler systems. The drain function allows the system to be drained quickly and the test function is beneficial for system testing that evaluates the water supply and ensures it’s readily available at the riser and on the system side of the main check valve. Since a test and drain does have the ability to drain the system, it can serve as the main drain on a wet pipe system. Furthermore, test and drains can replace ball valves on commercial or residential risers. The major benefit to a test and drain is its ability to perform necessary system testing in accordance with NFPA 25. These valves are equipped with a sight glass to provide visual confirmation of water flow through the system.
- A single handle ball valve
- A 5.6K or 8.0K test orifice
- Tamper-resistant sight glass
- A tapped and plugged port for system access
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