Installation Instructions - Watts
backflow assembly. 2. Watts Series 957, 957RPDA and LF957RPDA may be in-stalled in either horizontal, “N” pattern, or “Z” pattern position as long as the backflow assembly is installed in accordance with the direction of the flow arrow on the assembly and the local water authority approves the installation. 3.
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media.wattswater.comvalves or a backflow assembly have been operated. Certified tes-ters of backflow assemblies must conduct this confirming test. Figure 4 Relief Valve Discharge Rates 1⁄2" – 1" (15-25mm) 009 45 40 35 30 20 15 10 5 0 0 1020 3040 50 60 7080 90100 150 zone pressure psi Flow Rate gpm 1⁄2" 3⁄4" M2 X 1" M2 11⁄4" – 3" (32-80mm) 009 350 300 ...
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Series 009 - Watts
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