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2 . 18 PRESSURE SUSTAINING VALVES <br /> A back pressure valve shall be provided and mounted immediately before the discharge point. The <br /> sustaining valve shall be fabricated from PVC or CPVC , match piping, with a Teflon diaphragm seal . The <br /> valve shall be manufactured by Prominent, or equal . <br /> PART 3 - EXECUTION <br /> 3 .01 EXAMINATION <br /> A. Verify that building service connection and municipal utility water main size, location and <br /> invert are as indicated . <br /> 3 .02 PREPARATION <br /> A. Where applicable, ream pipe and tube ends and remove burrs . <br /> B . Remove scale and dirt, on inside and outside, before assembly. <br /> C . Prepare pipe connections to equipment with flanges or unions . <br /> 3 .03 PRESSURE TESTING AND DISINFECTION <br /> A. Flush, test, and disinfect system in accordance with Section 02670. <br /> END OF SECTION <br /> (Remainder of Page Intentionally Left Blank) <br /> I <br /> 044572017 <br /> 15100- 10 <br />