Fixtures shall be set level and in proper alignment with reference to adjacent walls. No water closet or bidet shall be set closer than inches mm from its center to a side wall or obstruction nor closer than inches mm center to center to a similar fixture..The General Assembly’s Illinois Administrative Code database includes only those rulemakings that have been permanently adopted. This menu will point out the Sections on which an emergency rule valid for a maximum of days, usually until replaced by a permanent rulemaking exists..MINNESOTA PLUMBING CODE SANITARY DRAINAGE TABLE . DRAINAGE FIXTURE UNIT VALUES DFU For SI units inch = mm Notes Indirect waste receptors shall be sized based on the total drainage capacity of the fixtures that drain therein to, in accordance with Table . b ..An island fixture vent, sometimes colloquially called a “Chicago Loop” is an alternate way of venting the trap installed on an under counter island sink or other similar applications where a conventional vertical vent stack or .