"Sovent" is an engineered drainage plumbing system that does not meet conventional code requirements as found in the uniform plumbing code, 1988 edition, as adopted by section 18.56.010 of this chapter, or its successor section. The system is based on the combined hydraulic/pneumatic flow and performance characteristics of drainage plumbing products, and will be allowed for use in the city under the following provisions:
A. Certification: The proprietor(s) of the engineered system shall certify that the plans meet the design requirements and shall also certify at the completion of the installation that they have inspected the system and that the system complies with the approved plans;
B. Submittal Of Calculations: Submit hydraulic and pneumatic calculations for the proposed system before a permit is obtained;
C. Offsets: A double offset shall be installed in the stack on floor levels where no fixture or branch connections are made;
D. Deaerator Fitting: A deaerator fitting shall be located as close as possible to the base of the stack. No branch or fixture connections are permitted on this system downstream from the deaerator fitting. A full size bottom pressure relief line shall connect the deaerator fitting to the building drain at least ten (10) pipe diameters downstream from the base of the stack through a wye fitting rolled above the centerline. The full size bottom pressure relief line shall be provided with an accessible upper terminal cleanout;
E. Prohibited Attachments: Pumpout, blowout, garbage disposal, clothes washing machine, or outlets from grease traps are prohibited in this system;
F. Cleanouts: Accessible cleanouts shall be provided in all horizontal drains. Cleanouts shall be provided for each aggregate change of direction exceeding one hundred thirty five degrees (135°);
G. Conventional Plumbing: Vents from conventional plumbing and pressure equalizing line vents from a sovent system shall not connect to the sovent stack below other drainage fittings;
H. Future Alterations: No alteration may be made without prior written permission from the division of building and housing services, and no provisions for future openings will be permitted on this system. This system shall be properly identified on each installation site. All buildings of B-2 occupancies with more than eight thousand (8,000) square feet per floor shall provide at least one 4-inch waste stack and one 4-inch vent stack for any alteration or additions. (Amended during 1/88 supplement: prior code § 5-14-11)