Water supply piping schematic showing multiple distribution lines ranging from two inches to four inches in diameter. A one-and-a-half-inch branch line connects to the two-inch main, incorporating isolation valves and a dual check valve or backflow preventer assembly. Each pipe run is labeled with specific sizing and identification numbers for coordination.
3/4" NS 1 1/2" NO. 1 4" NO. 2 4" NO. 3 WATER SUPPLY 1 2" NO. 2 2" NO. 1
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