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"All water service pipe or tubing, installed underground and outside of the structure, must have a minimum working pressure rating of _______________. Where the water pressure exceeds _______________, piping material shall have a minimum rated working pressure equal to the highest available pressure. A. 160 psi (1100 kPa) at 73.4ºF (23ºC), 160 psi (1100 kPa) B. 80 psi (550 kPa) at 73.4ºF (23ºC), 80 psi (550 kPa) C. 100 psi (690 kPa) at 73.4ºF (23ºC), 100 psi (690 kPa) D. 120 psi (828 kPa) at 73.4ºF (23ºC), 120 psi (828 kPa)!"
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