Specifications include, but are not limited to: 1. The resilient seat gate valves shall fully comply with the latest revision of AWWA C509, and shall also be UL listed and FM approved. The valves shall be tested and certified to ANSI/*NTSF 61.2. The valve shall have a 250 psig working pressure.3. The valve type shall be NRS (non-rising stem) for all buried applications and OS&Y (outside screw & yoke) for all above ground applications.4. The valve shall have an arrow cast on the operating nut or hand wheel showing opening direction. The valves shall open right.5. The NRS valves shall be provided with a 2" square operating nut and OS & Y valves shall be provided with a hand-wheel. The bolt that attaches the operating nut to the stem shall be recessed into the operating nut so as not to interfere with operation.