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Water service pipe shall conform to NSF 61 and to one of the standards listed in Table 18-29-605.4. All water service pipe or tubing, installed underground and outside of the structure, shall have a minimum working pressure rating of 160 psi (1100 kPa) at 73.45°F (23.03°C). Where the water pressure exceeds 160 psi (1100 kPa), piping material shall have a minimum rated working pressure equal to the highest available pressure. All ductile iron water pipe shall be cement mortar lined in accordance with AWWA C104.
Material | Standard |
Copper or copper-alloy tubing (Type K) | ASTM B 75; ASTM B 88; ASTM B 251; ASTM B 447 |
Ductile iron water pipe | AWWA C151; AWWA C115 |