Oregon Revised Statutes Public Health and Safety § 447.140

(1) All waste water and sewage from plumbing fixtures shall be discharged into a sewer system or alternate sewage disposal system approved by the Environmental Quality Commission or Department of Environmental Quality under ORS chapters 468, 468A and 468B.

(2) No plumbing fixture, device or equipment shall be installed, maintained or offered for sale which will provide a cross-connection between the distributing system of water for drinking and domestic purposes and any other water supply, or a drainage system, soil or waste pipe so as to permit or make possible the backflow of contaminated water, sewage or waste into the water supply system.

(3) No flush valve, vacuum breaker or syphon preventer shall be offered for sale or installed that has not been approved by the Department of Consumer and Business Services with the approval of the State Plumbing Board.

(4) The use or installation of water-operated sump pumps or sewage ejectors, if connected to the potable water supply, is prohibited.

(5) No pan, plunger, offset washout, washout, long hopper, frost proof or other water closets having invisible seals or unventilated spaces, or walls not thoroughly washed at each flushing, shall be installed or sold for use in any building.

(6) No plumbing fixture, appurtenance or device, the installation of which would be in violation of the state plumbing specialty code and the rules of the department approved by the board shall be sold, offered for sale or installed.