Part 890: ILLINOIS PLUMBING CODE

Section 890.1040 Air Gaps The air gap between an indirect waste and the drainage system shall be at least two (2) times the diameter of the fixture drain or drainage pipe served, but shall never be less than one (1) inch. For requirements in excess of this minimum, see Appendix A…

Section 890.1050 Receptors a) Installation. Receptors serving indirect waste pipes shall be trapped and vented and shall not be installed in any concealed, inaccessible or unventilated space, and shall be sized to prevent overflow. b) Strainers and Baskets. A receptor shall be eq…

Section 890.1060 Special Wastes and Chemical Wastes a) Acid Wastes. Acid and chemical waste piping and fittings, including the trap, shall be of material that will not be damaged by the waste being discharged. b) Neutralizing Device. Corrosive liquids, spent acids, or other harmf…

Section 890.110 Applicability a) The rules in this Part govern the design and installation of new plumbing or plumbing systems and the alteration of plumbing systems. They apply to all new construction and any remodeling or renovation that alters, renovates or replaces existing p…

Section 890.1110 Quality of Water Supply All premises intended for human habitation or occupancy shall be provided with a potable water supply. The potable water supply shall not be connected to non-potable water and shall be protected from backflow and back siphonage. (See Appen…

Section 890.1120 Color Code Identification of Piping. All piping conveying non-potable water shall be permanently identified by a continuous purple coloring so that the piping is readily distinguishable from piping carrying potable water. (See the color codes of ANSI/NEMA Z535.1 …

Section 890.1130 Protection of Potable Water a) Cross-Connection (Submergence). Potable water supply piping and water discharge outlets shall not be submerged in any sewage or toxic substance. Potable water supply piping or water discharge outlets that are submerged in other subs…

Section 890.1140 Special Applications and Installations a) Atmospheric Vacuum Breaker. An atmospheric vacuum breaker shall be installed between the control valve and the fixture in a manner that it will not be subject to water pressure, except the pressure incidental to water flo…

Section 890.1150 Water Service Pipe Installation a) Underground Water Service. Water service pipe shall be installed outside the foundation wall in accordance with either subsection (a)(1) or (2) and shall comply with both subsections (a)(3) and (4). 1) Water service and building…

Section 890.1160 Potable Water Pumping and Storage Equipment a) Pumps and Other Appliances. Potable water pumps, tanks, filters, and all other appliances and devices shall be protected against contamination. b) Water Supply Tanks. Potable water supply tanks shall be properly cove…

Section 890.1170 Potable Water Supply Tanks and Auxiliary Pressure Tanks a) Water Pressure. When the water pressure from the public water supply main is insufficient during periods of peak flow or due to the building height to supply all fixtures in accordance with Section 890.12…

Section 890.1180 Flushing/Disinfection of Potable Water System New or repaired potable water systems shall be flushed or disinfected prior to use as follows: a) Chlorinated Water Supply. If the potable water supply serving the water supply system is chlorinated, e.g., a community…

Section 890.1190 Water Supply Control Valves and Meter a) A full-port shut-off valve shall be located near the curb or property line and immediately inside the building, on the inlet and outlet side of the water meter. When located underground, this valve shall be in a stop box o…

Section 890.120 Definitions For the purpose of administering and enforcing this Part, the following terms, which consist of words or expressions that have a precise meaning in plumbing, shall have the meaning indicated. Refer to Appendix A for standards applicable to plumbing app…

Section 890.1200 Water Service Sizing a) Water Service Pipe Sizing. The water service pipe from the street main (including the tap) to the water distribution system for the building shall be sized in accordance with Appendix A, Tables M, N, O, P and Q. Water service pipe and fitt…

Section 890.1210 Design of a Building Water Distribution System a) Design and Installation. The design and installation of the hot and cold water building distribution systems shall provide a volume of water at the required rates and pressures to ensure the safe, efficient and sa…

Section 890.1220 Hot Water Supply and Distribution a) All water heaters shall comply with Appendix A.Table A (Approved Standards for Plumbing Appliances/Appurtenances/Devices) and ASHRAE 90 Standards. Hot water storage tanks shall meet construction requirements of ASME, AGA or UL…

Section 890.1230 Safety Devices a) All equipment used for heating water or storing hot water shall be provided, at the time of installation of the equipment, with the required relief valve or valves to protect against excessive or unsafe temperature and pressure. This shall be ac…

Section 890.1240 Miscellaneous Drain Cock. All storage tanks shall be equipped with drain cocks.

Section 890.130 Incorporated and Referenced Materials a) The following State and federal statutes and State administrative rules are referenced in this Part: 1) Illinois Plumbing License Law [225 ILCS 320] 2) Private Sewage Disposal Licensing Act [225 ILCS 225] 3) Illinois Ground…

Section 890.1310 Materials a) General. All materials used for drainage systems and clear water vacuum waste systems shall comply with Appendix A.Table A (Approved Building Drainage/Vent Pipe). b) Corrosive Waste. If corrosive waste is discharged to the drainage system, or if soil…

Section 890.1320 Drainage System Installation a) Drain – Underground. A building drainage system installed in the ground shall be of cast iron, copper Type "K", or non-metallic Schedule 40 or heavier. Drains shall be installed on a continuous bed of undisturbed earth or granular …

Section 890.1330 Drainage Fixture Units (DFUs) a) Values for Fixtures. Drainage fixture units (DFUs) (see Appendix A.Table E) designate the relative load of different kinds of fixtures that shall be used to calculate the total load carried by a soil or waste pipe, and shall be us…

Section 890.1340 Determination of Sizes for Drainage System a) Maximum Fixture Unit Load. The maximum number of DFUs that may be connected to a given size of building drain, horizontal branch, or vertical soil or waste stack is established in Appendix A.Tables G and H. Exception:…

Section 890.1350 Offsets in Drainage Piping a) Offsets of 45 Degrees or Less. An offset in a vertical soil or waste stack with a change of direction of 45 degrees or less from the vertical shall be sized as a straight vertical stack. If a horizontal soil or waste branch connects …

Section 890.1360 Sanitary Wastes below Sewer a) Sanitary Wastes below Sewer 1) Sanitary wastes that cannot be discharged by gravity flow shall be discharged into a gas-tight, covered and vented sump from which the waste shall be lifted and discharged into a sanitary waste drain b…

Section 890.1370 Floor Drains a) Required. Any building or structure in which plumbing fixtures or piping is installed in or under a concrete floor to accommodate fixtures on the level of the concrete floor shall have at least one trapped and vented floor drain. Additional floor …

Section 890.1380 Storm Water Drainage within a Building Any piping installed within a building for the purpose of carrying storm water from a roof and connected to a building drain or building sewer shall comply with the requirements of Appendix A.Table A (Approved Building Drain…

Section 890.140 Compliance with this Part a) Existing Buildings. In existing buildings, including historic buildings, or premises in which plumbing installations are to be altered, renovated or replaced, materials and methods shall meet or exceed the provisions of this Part. b) V…

Section 890.1410 Materials a) All piping and fittings used in the vent system shall conform to requirements of Appendix A, Table A, "Approved Building Drainage/Vent Pipe" and "Approved Standards for Fittings". b) A system carrying corrosive waste shall be of approved materials as…

Section 890.1420 Stack Vents, Vent Stacks, Main Vents a) Design. A properly designed and installed venting system, in conjunction with the soil or waste system, is essential to protect trap seals and prevent siphonage, aspiration, or back pressure. The venting system shall be des…

Section 890.1430 Vent Terminals a) Vent Terminals. Vents shall terminate independently above the roof to the outside atmosphere or shall be connected to another vent at least 6 inches above the flood‑level rim of the highest fixture served by the vent. (See Appendix K.Illustratio…

Section 890.1450 Vent Grades and Connections a) Grade. All vent and branch vent pipes shall be installed so as to drain back to the soil or waste pipe. (See Appendix K.Illustration F.) b) Vertical Rise. Where vent pipes connect to a horizontal soil or waste pipe, the vent shall b…

Section 890.1470 Fixture Trap Vents a) Distance of Trap From Vent. Each fixture trap shall have a protecting vent located so that the developed length in the fixture drain from the trap weir to the vent fitting is within the requirements in Appendix A.Table I. (See Appendix K.Ill…

Section 890.1480 Types of Fixture Trap Vents a) Individual Dry Vent is a single fixture trap vent only and shall not be installed as part of a wet vent. b) Common Vent. A vertical common vent may be used for two fixture traps if both traps connect with a vertical waste at the sam…

Section 890.150 Workmanship a) All plumbing work performed shall comply with the provisions of this Part. b) In the process of installing or repairing any part of a plumbing system, the floors, walls, ceilings, tile work, or any other part of the building or premises which must b…

Section 890.1500 Installation of Wet Venting a) The following shall not be used to wet vent another fixture trap: water closets, washing machine connections, blowout urinals, or dishwashers. b) Two lavatories with 1¼-inch traps shall be considered a single fixture for the purpose…

Section 890.1520 Circuit and Loop Venting a) Battery Venting. A soil or waste branch to which two but not more than eight of the same type of floor outlets or fixtures, such as eight water closets, eight pedestal urinals, eight shower stalls or eight floor drains are connected in…

Section 890.1530 Pneumatic Ejectors An air pressure relief vent from a pneumatic ejector shall not be connected to the regular venting system but shall be connected separately to the outside atmosphere terminating as required in Section 890.1430 for vent extensions through roofs.…

Section 890.1540 Relief Vents Stacks with More Than Ten (10) Branch Intervals. Soil and waste stacks in buildings having more than ten (10) branch intervals shall be provided with a relief vent at each tenth interval, beginning with the top floor, or may be installed mid-way betw…

Section 890.1550 Offsets at an Angle Less Than 45 Degrees from the Horizontal in Buildings of Five or More Stories a) Offset Vents. Offsets less than 45 degrees from the horizontal in a soil or waste stack, except as provided in Section 890.1350, shall comply with subsections (b)…

Section 890.1570 Vent Headers Connection of Vents. Stack vents and vent stacks may be connected into a common vent header at the top of the stacks and then be extended through the roof to the outside atmosphere at one point. This header shall be sized as provided in Appendix A, T…

Section 890.1580 Size and Length of Vents a) Size of Water Closet Vents. A water closet shall have at least a 2-inch vent. b) Size of Individual Vents. The diameter of an individual vent shall be at least 1¼ inches or at least half the diameter of the drain to which it connects, …

Section 890.1590 Combination Waste and Vent (Floor and Hub Drains Only) A combination waste and vent system consisting of floor and hub drains may be installed when structural conditions preclude conventional plumbing. Appurtenances delivering large quantities or surges of water …

Section 890.160 Used Plumbing Material, Equipment, Fixtures a) Previously used plumbing material, equipment and/or fixtures may be re-used for plumbing installations only if it complies with this Part at the time of the new installation. b) Used pipe or fittings shall not be inst…

Section 890.1600 Special Venting for Island Fixtures a) Traps for island sinks and similar equipment shall be roughed in above the floor and shall be vented by extending the vent as high as possible, but at least the drainboard height, and then returning it downward and connectin…

Section 890.170 Sewer and/or Water Required a) Each building which is intended for human habitation or occupancy shall have a connection to a public water system, a semi-private water system, or a private water supply constructed in accordance with the requirements of the Illinoi…