Backflow Installation Drawings

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Reduced Pressure Backflow Preventers
0.75-2" (GSO-12)
3-8" (GSO-15)
Add-on Meter and Backflow (GSO-17)

Double Check Valves (Approved Fire Lines Only)
3/4-1" (GSO-11)
1.5-2" (GSO-13)           
3-8" (GSO-14)

Water Tanker Truck Connection (GSO-19)