(A) An approved backflow device shall be installed on all connections to the public water supply as described in the Plumbing Code, 77 Ill. Adm. Code 890, and the Agency’s regulations, 35 Ill. Adm. Code 680. In addition, an approved backflow prevention device shall be installed on each service line to a consumer’s water system serving premises where, in the judgment of the Superintendent, actual or potential hazards to the public water supply system exist.
(1) An approved backflow prevention device shall be installed on each service line to a consumer’s water system serving premises where the following conditions exist:
(a) Premises having an auxiliary water supply, unless such auxiliary supply is accepted as an additional source by the Superintendent, and the source is approved by the State Environmental Protection Agency;
(b) Premises on which any substance is handled which can create an actual or potential hazard to the public water supply system. This shall include premises having sources or system containing process fluids or waters originating from the public water supply system which are no longer under the sanitary control of the Superintendent;
(c) Premises having internal cross-connections that, in the judgment of the Superintendent, are not correctable or intricate plumbing arrangements which make it impractical to determine whether or not cross-connections exist;
(d) Premises where, because of security requirements or other prohibitions or restrictions, it is impossible or impractical to make a complete cross-connection survey; and
(e) Premises having a repeated history or cross-connections being established or reestablished.
(2) An approved backflow device shall be installed on all connections to the public water supply as described in the Plumbing Code, 77 Ill. Adm. Code 890, and the Agency’s regulations, 35 Ill. Adm. Code 653. In addition, an approved backflow prevention device shall be installed on each service line to a consumer’s water system serving, but not necessarily limited to, the following types of facilities, unless the Superintendent determines that no actual or potential hazard to the public water supply system exists:
(a) Hospitals, mortuaries, clinics, and nursing homes;
(b) Laboratories;
(c) Piers, docks, and waterfront facilities;
(d) Sewage treatment plants, sewage pumping stations, or stormwater pumping stations;
(e) Food or beverages processing plants;
(f) Chemical plants;
(g) Metal plating industries;
(h) Petroleum processing or storage plants;
(i) Radioactive material processing plants or nuclear reactors;
(j) Car washes;
(k) Pesticide or herbicide or extermination plants and trucks; and
(l) Farm service and fertilizer plants and trucks.
(Prior Code, § 38-3-48)
(B) (1) The type of protection required under division (A) above shall depend on the degree of hazard which exists as follows.
(a) An approved fixed proper air gap separation shall be installed where the public water supply system may be contaminated with substances that could cause a severe health hazard.
(b) An approved fixed proper air gap separation or an approved reduced pressure principle backflow prevention assembly shall be installed where the public water supply system may be contaminated with a substance that could cause a system or health hazard.
(c) An approved fixed proper air gap separation or an approved reduced pressure principle backflow prevention assembly or a double check valve assembly shall be installed where the public water supply system may be polluted with substances that could cause a pollution hazard not dangerous to health.
(2) The type of protection required under division (A) above shall be an approved fixed proper air gap separation or an approved reduced pressure principle backflow prevention device.
(3) Where a public water supply or an auxiliary water supply is used for a fire protection system, reduced-pressure principle backflow preventers shall be installed on fire safety systems connected to the public water supply when:
(a) The fire safety system contains antifreeze, fire retardant, or other chemicals;
(b) Water is pumped into the system from another source;
(c) Water flows by gravity from a non-potable source or water can be pumped into the fire safety system from any other source; or
(d) There is a connection whereby another source can be introduced into the fire safety system.
(4) All other fire safety systems connected to the potable water supply shall be protected by a double check valve assembly on metered service lines and a double detector check valve assembly on unmetered service lines.
(Prior Code, § 38-3-49)