TITLE 77: PUBLIC HEALTH
CHAPTER I: DEPARTMENT OF PUBLIC HEALTH
SUBCHAPTER r: WATER AND SEWAGE
PART 890 ILLINOIS PLUMBING CODE
SECTION 890.1140 SPECIAL APPLICATIONS AND INSTALLATIONS
Section 890.1140 Special Applications and Installations
a) An atmospheric vacuum breaker shall be installed between the control valve and the fixture and in such a manner that it will not be subject to water pressure, except the pressure incidental to water flowing to the fixture. An atmospheric vacuum breaker shall be installed on the outlet side of the control valve.
b) Flushometer Valve. Flush valves shall be equipped with vacuum breakers installed on the discharge side of the flushing valve with the critical level at least 4 inches above the overflow rim of the bowl or 4 inches above the top of the urinal. (See Appendix I: Illustration D.)
c) Flushing Tanks. Flushing tanks shall be equipped with anti-siphon ball cocks. The ball cock shall be installed with the critical level of the vacuum breaker at least one inch above the full opening of the overflow pipe. In cases where the ball cock has no hush tube, the bottom of the water supply inlet shall be installed one inch above the top of the overflow pipe. (See Section 890.650(d).)
d) Lawn Sprinklers. Any lawn sprinkler system connected to a potable water supply shall be equipped with a reduced pressure principle backflow preventer assembly (RPZ). The RPZ may be located outside provided it is protected from freezing or is removed at the end of the season, and it conforms with Section 890.1130(g)(1).
e) Valve Outlets for Hose Attachments.
1) All threaded valve outlets shall have backflow protection in accordance with Section 890.1130. All outside threaded valve outlets shall not be subject to freezing.
2) Yard hydrants shall be installed as follows:
A) Potable Water. All hydrants with threaded spigots shall have backflow protection attached to the hydrant spigot (if threaded) and either:
i) Hydrants with buried drain down (weep) holes shall have the drain down (weep) holes protected from ground water backup by proper open site drainage. A backflow preventer shall not be used on the buried drain down (weep) hole to protect the hydrant from ground water backup; or
ii) A yard hydrant that automatically drains back to a sealed container when flow is shut off, such as a canister type hydrant.
B) Non-potable Water
One or more hydrants may be installed for non-potable use if they are isolated from the potable water supply by a properly installed backflow preventer device in accordance with Section 890.1130(f). The hydrants must be clearly identified as non-potable by color (see Section 890.1120) and bear a sign that reads as follows: "This water unsafe for drinking."
3) In a campground licensed in accordance with the Department's rules entitled Youth Camp Code (77 Ill. Adm. Code 810) or Recreational Area Code (77 Ill. Adm. Code 800), backflow protection is not required if the water supply line is directly connected to a recreational vehicle and is under constant pressure.
f) Commercial Laundry Machines. The potable water supply to commercial laundry machines shall be protected against back siphonage by an air gap or backflow protection device. If a vacuum breaker is used, it shall be a minimum of 26 inches above the top of the machine.
g) Commercial Dishwashers. Commercial dishwashers shall be equipped with an approved vacuum breaker located in the rinse water supply line on the discharge side of the final control valve, a minimum distance of 6 inches above the uppermost spray outlets. The cold water or make-up water supply line shall be provided with an air gap or a vacuum breaker located on the discharge side of the final control valve, a minimum distance of 6 inches above the overflow level or flood rim.
h) Aspirators. Water operated aspirators shall meet the following specifications:
1) The water supply line shall be equipped with a shut-off valve.
A) In operating rooms, emergency rooms, recovery rooms, delivery rooms, autopsy rooms, dental offices and laboratories where aspirators are installed for removing blood, pus and/or other fluids, a vacuum breaker shall be installed on the discharge side of the control valve, at ceiling height (a minimum of 7 feet, 6 inches); or a reduced pressure principle backflow preventer assembly shall be used.
B) Water operated aspirators used for dispensing detergent shall be protected against backflow and back siphonage by an atmospheric vacuum breaker or a reduced pressure principle backflow preventer assembly.
2) The aspirator water discharge shall be provided with a 2 inch air gap to the receiving fixture.
i) Manufactured Housing and Mobile Home Units Manufactured Prior to June 15, 1976. At the time of water service connection, backflow protection must be installed between the water service line and any manufactured housing or mobile home unit that was manufactured prior to June 15, 1976. Backflow protection shall be provided by at least a dual check valve backflow preventer assembly (DuC) conforming to ANSI/ASSE 1024-1990. This backflow protection must be installed in all instances where a unit manufactured prior to June 15, 1976 is connected or re-connected to a water service line, e.g., for connection of a relocated unit, or re-connection of a unit that was disconnected to allow repairs to the water line; however, backflow protection is not required for existing units unless a new connection or re-connection to the water service line occurs.
j) Carbonated Beverage Dispensers Water Supply. The water supply to carbonated beverage dispensers shall be protected by one of the following methods:
1) Air gap.
2) ASSE 1022-1996 backflow preventer.
3) ASSE 1032-1980 backflow preventer with vent port added.
(Source: Amended at 28 Ill. Reg. 4215, effective February 18, 2004)