327 IAC 8-10-5 Secondary sources of supply; installation of air gaps or other devices

Sec. 5. (a) Customers shall construct an air gap, or install a reduced pressure principle backflow preventer or double check valve assembly, in accordance with section 7 of this rule, on the customer service line to: (1) tanks used only to store water from the PWS for fire suppression that are constructed to maintain the bacteriological quality of the water, in compliance with 327 IAC 8-2.7; or (2) secondary sources of supply that: (A) use well water as the only private source of supply; (B) are constructed to maintain the bacteriological quality of the water, in compliance with 327 IAC 8-2.7; and (C) produce, without treatment, water meeting the drinking water quality standards enumerated in 327 IAC 8-2.7. (b) Customers shall construct an air gap, or install a double check valve assembly or reduced pressure principle backflow preventer, in accordance with section 7 of this rule, for a fire sprinkler system, to prevent stagnant water from backflowing into the drinking water supply. For a fire sprinkler system with a chemical additive, customers shall install a reduced pressure principle backflow preventer to prevent the chemical additive backflowing into the drinking water supply. (c) A secondary source of supply of a type other than those enumerated in subsections (a) and (b) must not be physically connected on the customer service line to or into the facility.