Construction of nonpotable water systems or systems carrying any other nonpotable substance must be such as to prevent backflow or backsiphonage into a potable water system.
02-331 C.M.R. ch. 8, § 8
Construction of nonpotable water systems or systems carrying any other nonpotable substance must be such as to prevent backflow or backsiphonage into a potable water system.
02-331 C.M.R. ch. 8, § 8