(A) All proposed installations of fire suppression systems shall be reviewed by the Superintendent to determine the appropriate type of backflow prevention device(s) required.
(B) All proposed fire suppression systems requiring an antifreeze solution shall use a pharmaceutical-grade antifreeze. The consumer shall provide to the Superintendent a certification identifying the type of pharmaceutical-grade antifreeze which will be used. A double check valve backflow prevention device shall be installed in an approved manner.
(C) A double check valve of an approved type shall be installed on all proposed fire suppression systems not utilizing antifreeze, but this may be done only when there are no other cross-connections.
(D) All existing fire suppression systems shall meet the requirements of divisions (B) and (C) above, whichever applies. An inspection by a certified fire suppression specialist shall be done to determine whether pharmaceutical-grade antifreeze has been utilized. This shall be done at the expense of the consumer. If it cannot be certified that only pharmaceutical-grade antifreeze has been used, then a reduced pressure principle backflow prevention device shall be installed as approved by the Superintendent. This also shall be done at the expense of the consumer.
(E) In the event cross-connections, such as those found in using auxiliary water supply systems or in providing other water additives such as foaming agents, are necessary for the proper operation of the fire suppression system, then a reduced pressure zone backflow prevention device shall be installed in an approved manner.
(Prior Code, § 6-133) Penalty, see § 51.999