Part 890: ILLINOIS PLUMBING CODE

Section 890.780 Garbage Can Washers a) Water Supply Connection. The water supply to garbage can washers shall be connected through an air gap or by means of proper backflow protection in accordance with Sections 890.1130 and 890.1140. b) Discharge. Garbage can washers shall not d…

Section 890.790 Laundry Trays/Sinks and Drains a) Waste openings. Each compartment of a laundry tray shall be provided with a waste opening at least 1½ inches in diameter and with a stopper or strainer. b) Commercial Laundry Drains. Commercial laundry machines shall discharge ind…

Section 890.800 Special Fixtures and/or Items Designed for a Particular Purpose a) Emergency showers and eye wash stations within a building shall be provided with potable water and a trapped and vented receptor and shall comply with ANSI Z358.1. b) Emergency eye wash stations sh…

Section 890.810 Minimum Number of Plumbing Fixtures a) Minimum Number of Fixtures Required. Plumbing fixtures shall be provided, for each building type and occupant load, in the minimum numbers shown in Appendix A.Table B, Minimum Number of Plumbing Fixtures, except as noted in f…

Section 890.820 Outside Kiosks Serving Food a) General Plumbing. All plumbing shall be sized, installed and maintained in accordance with applicable provisions of this Part. b) General Restrooms. Restrooms for employees shall be provided and accessible to employees at all times. …

Section 890.910 Hangers, Anchors and Supports a) General. Hangers, anchors and supports shall be of material and strength to support the piping and its contents and maintain its proper alignment. Hangers, anchors and supports shall be securely attached to the building constructio…

Section 890.920 Vertical Piping a) Attachment. Vertical piping shall be secured at intervals to keep the pipe in alignment and carry the weight of the pipe at its maximum capacity. Stacks shall be supported at their base and, if over two (2) stories in height, shall be supported …

Section 890.930 Horizontal Piping a) Support. Horizontal piping shall be supported at sufficiently close intervals to keep the piping in alignment and prevent sagging. b) Cast Iron Soil Pipe. Where joints occur, suspended cast iron pipe shall be supported within 18 inches of each…

Section 890.APPENDIX A Plumbing Materials, Equipment, Use Restrictions and Applicable Standards Abbreviations used in Appendix A.Table A refer to the following agencies or organizations: 1) ANSI – American National Standards Institute; 1819 L Street, N.W., 11th Floor, Washington …

Section 890.TABLE A Approved Materials and Standards All materials shall meet at least one of the approved standards listed. Approved Building Drainage/Vent Pipe 1) Acrylonitrite Butadiene Styrene (ABS) Pipe ASTM D 2661-2011 ASTM F 628-2012 CSA B181.1-2011 in B1800 Joints ASTM D …

Section 890.TABLE B Minimum Number of Plumbing Fixtures Type of Building All Facilities for Employee Use Single Dwelling or Unit of Multiple Dwelling; Condo. or Apartment; or Hotel/Motel Unit Male Female Water closets (Fixtures per person) For 1-5 Total Employees See Section 890.…

Section 890.TABLE C Minimum Air Gaps for Plumbing Fixtures Minimum Air Gap (Inches) When Not Affected by Near Wall1 When Affected by Near Wall2 Lavoratories and other fixtures with effective opening not greater than ½ inch diameter. 1 1½ Drinking water fountains, single orifice n…

Section 890.TABLE D Minimum Water Distribution Pipe Size Type of Fixture or Device (See Footnotes 1 & 2) Pipe Size (inches) Bathtubs ½ Combination sink and tray ½ Drinking fountain ⅜ Dishwasher (domestic) ½ Dishwasher (commercial) ¾ Kitchen sink (residential) ½ Kitchen sink (comm…

Section 890.TABLE E Drainage Fixture Units (D.F.U.) Per Fixture Group Type of Fixture D.F.U./Fixture (Load) Minimum Size of Trap2 (inches) Bathroom groups: 1 tank water closet, 1 lavatory with 1¼ inch trap and 1 bathtub1 or shower stall 7 1¼ 1 water closet with flush valve, 1 lav…

Section 890.TABLE F Fixtures Not Listed in Table E Fixture Drain or Trap Size Drainage Fixture Unit Valve (D.F.U.) 1¼ inches and smaller 1 1½ inches 2 2 inches 3 2½ inches 4 3 inches 5 4 inches 6

Section 890.TABLE G Building Drains Diameter of Pipe (inches) Maximum Number of Drainage Fixture Units (D.F.U.) That May be Connected to Any Portion of the Building Drain Grade per Foot 1/16 Inch ⅛ Inch ¼ Inch ½ Inch 4 − 180 216 250 5 − 390 480 575 6 − 700 840 1,000 8 1,400 1,600…

Section 890.TABLE H Horizontal Fixture Branches and Stacks Maximum Number of Drainage Fixture Units (D.F.U.) That May be Connected to: More than 3 Stories in Height Diameter of Pipe (inches) Any Horizontal Fixture Branch One Stack of 3 Stories in Height or 3 Intervals Total for S…

Section 890.TABLE I Allowed Distance from Fixture Trap to Vent Size of Fixture Drains (Inches) Maximum Allowed Distance from Trap to Vent 1¼ 2 ft. 6 in. 1½ 3 ft. 6 in. 2 4 ft. 0 in. 3 5 ft. 0 in. 4 and larger 6 ft. 0 in.

Section 890.TABLE J Size of Vent Stacks Number of Bathroom Groups Diameter of Vent Stacks (Inches) 1 or 2 2 3 to 9 3 10 to 16 4

Section 890.TABLE K Size and Length of Vents Size of Soil or Waste Stack Fixture Units Connected Diameter of Vent Required (Inches) 1¼ 1½ 2 2½ 3 4 5 6 8 Maximum Length of Vent (Feet) 1¼ 2 30 1½ 8 50 150 1½ 10 30 100 2 12 30 75 200 2 20 26 50 150 2½ 42 30 100 300 3 10 30 100 200 6…

Section 890.TABLE L Horizontal Circuit and Loop Vent Sizing Table Line Soil or waste pipe diam. (in.) Fixture Units (max. number Diameter of circuit or loop vent (in.) 1½ 2 2½ 3 4 5 Maximum Horizontal Length (ft.) 1 1½ 10 20 2 2 12 15 40 3 2 20 10 30 4 3 10 20 40 100 5 3 30 40 10…

Section 890.TABLE M Load Values Assigned to Fixtures Fixture Occupancy Type of Supply Control Load Values in Water (Supply Fixture Units) Cold Hot Total Water Closet Public/Private Flush Valve 10 – 10 Water Closet Public/Private Flush Tank 3 – 3 Urinal Public 1" Flush Valve 10 – …

Section 890.TABLE N Water Supply Fixture Units (WSFU) for a Supply System with Flush Tanks Water Closets WSFU Demand (GPM) Pipe Size (Inches) Pressure Loss (PSI/100' of Pipe) Velocity (Ft./Sec.) Meter Size (Inches) 2 2 ½" 4.2 2.7 ⅝" 4 3 ½" 8.7 4.2 ⅝" 6 5 ½" 22.5 7.0 ⅝" 8 6.5 ¾" 6…

Section 890.TABLE O Water Supply Fixture Units (WSFU) for a Supply System with Flushometer Water Closets WSFU Demand (GPM) Pipe Size (Inches) Pressure Loss (PSI/100' of Pipe) Velocity (Ft./Sec.) Meter Size (Inches) 10 27 1¼" 8.3 6.8 ¾" 12 28.6 1¼" 9.2 7.2 ¾" 14 30.2 1¼" 10 7.9 ¾"…

Section 890.TABLE P Demand at Individual Water Outlets Demand at Individual Water Outlets Type of Outlet Demand (g.p.m.) Ordinary Lavatory Faucet 2.0 Self Closing Lavatory Faucet 2.5 Sink Faucet, ⅜" or ½" 4.5 Sink Faucet, ¾" 6.0 Bath Faucet, ½" 5.0 Shower Head, ½" 5.0 Laundry Fau…

Section 890.TABLE Q Allowance in Equivalent Length of Pipe for Friction Loss in Valves and Fittings The following applies to all types of material approved for potable water distribution: Equivalent Feet of Pipe for Various Pipe Sizes Valve or Fitting ½" ¾" 1" 1¼" 1½" 2" 2½" 3" 4…

Section 890.ILLUSTRATION A Air Gap Drawing #1 (Referenced in Section 890.120, Definition of "Air Gap.")

Section 890.ILLUSTRATION AA Sleeves (Referenced in Section 890.180(c) and (d)) (Source: Amended at 38 Ill. Reg. 9940, effective April 24, 2014)

Section 890.ILLUSTRATION B Air Gap Drawing #2 (Referenced in Section 890.120, Definition of "Air Gap.")

Section 890.ILLUSTRATION BB Buried Piping Parallel to Footing (Referenced in Section 890.180(e) and (f)) (Source: Added at 38 Ill. Reg. 9940, effective April 24, 2014)

Section 890.ILLUSTRATION C Battery of Fixtures (Referenced in Section 890.120, Definition of "Battery of Fixtures.") (Source: Amended at 38 Ill. Reg. 9940, effective April 24, 2014)

Section 890.ILLUSTRATION CC Individual Dry Vent (Referenced in Section 890.120, Definition of "Individual Dry Vent.") (Source: Added at 38 Ill. Reg. 9940, effective April 24, 2014)

Section 890.ILLUSTRATION D Branch (Referenced in Section 890.120, Definition of "Branch.")

Section 890.ILLUSTRATION E Branch Vent (Referenced in Section 890.120, Definition of “Branch Vent.”)

Section 890.ILLUSTRATION F Building Drain (Referenced in Section 890.120, Definition of "Building Drain.")

Section 890.ILLUSTRATION G Building Sub-Drain (Referenced in Section 890.120, Definition of "Building Sub-Drain.") (Source: Amended at 38 Ill. Reg. 9940, effective April 24, 2014)

Section 890.ILLUSTRATION H Circuit Vent (Referenced in Section 890.120, Definition of "Circuit Vent.") (Source: Amended at 38 Ill. Reg. 9940, effective April 24, 2014)

Section 890.ILLUSTRATION I Common Vent (Referenced in Section 890.120, Definition of "Common Vent.") (Source: Amended at 38 Ill. Reg. 9940, effective April 24, 2014)

Section 890.ILLUSTRATION J Continuous Vent (Referenced in Section 890.120, Definition of "Continuous Vent.")

Section 890.ILLUSTRATION K Dead End (Referenced in Section 890.120, Definition of "Dead End.")

Section 890.ILLUSTRATION L Drain (Referenced in Section 890.120, Definition of "Drain.")

Section 890.ILLUSTRATION M Fixture Drain (Referenced in Section 890.120, Definition of "Fixture Drain.")

Section 890.ILLUSTRATION O Grade (Referenced in Section 890.120, Definition of "Grade.")

Section 890.ILLUSTRATION P Horizontal Branch (Referenced in Section 890.120, Definition of "Horizontal Branch.")

Section 890.ILLUSTRATION Q Main Vent (Referenced in Section 890.120, Definition of "Main Vent.") (Source: Amended at 38 Ill. Reg. 9940, effective April 24, 2014)

Section 890.ILLUSTRATION S Relief Vent (Referenced in Section 890.120, Definition of "Relief Vent.")

Section 890.ILLUSTRATION U Revent Pipe (Referenced in Section 890.120, Definition of "Revent Pipe.")