I'm not using an AAV for this. Thanks for the feedback.
It takes a certain mentality to install a piece of plastic and rubber seal to prevent flammable and carcinogenic fumes from entering a structure.
Imagine if a bug gets trapped in the rubber or the rubber cracks there goes the "protection"
I am fortunate to have had an account that owned a building built in 1865 the existing cast iron is still in good condition and the venting is all original
I am curious how for over a century plumbers were able to vent all the fixtures regardless of location and did not rely on cheater vents
Basic Principles
Principle No. 1: All premises intended for human habitation, occupancy or use shall be provided with a supply of pure and wholesome water, neither connected with unsafe water supplies nor subject to the hazards of backflow or back siphonage.
Principle No. 2: Plumbing fixtures, devices, and appurtenances shall be supplied with water in sufficient volume and at pressures adequate to enable them to function satisfactorily and without undue noise under all normal conditions of use.
Principle No. 3: Plumbing shall be designed and adjusted to use the minimum quantity of water consistent with proper performance and cleaning.
Principle No. 4: Devices for heating and storing water shall be so designed and installed as to prevent dangers from explosion through overheating.
Principle No. 5: Every building having plumbing fixtures installed and intended for human habitation, occupancy, or use on premises abutting on a street, alley or easement in which there is a public sewer shall have a connection with the sewer.
Principle No. 6: Each family dwelling unit on premises abutting on a sewer or with a private sewage-disposal system shall have, at least, one water closet and one kitchen-type sink. It is further recommended that a lavatory and bathtub or shower shall be installed to meet the basic requirements of sanction and personal hygiene.
All other structures for human occupancy or use on premises abutting on a sewer or with a private sewage-disposal system shall have adequate sanitary facilities but in no case less than one water closet and one other fixture for cleaning purposes.
Principle No. 7: Plumbing fixtures shall be made of smooth nonabsorbent material, shall be free from concealed fouling surfaces, and shall be located in ventilated enclosures.
Principle No. 8: The drainage system shall be designed, constructed and maintained so as to guard against fouling, deposit of solids and clogging, and with adequate cleanouts so arranged that the pipes may be readily cleaned.
Principle No. 9: The piping of the plumbing system shall be of durable material, free from defective workmanship, and so designed and constructed as to give satisfactory service for its reasonable expected life.
Principle No. 10: Each fixture directly connected to the drainage system shall be equipped with a water-seal trap.
Principle No. 11: The drainage system shall be designed to provide an adequate circulation of air in all pipes with no danger of siphonage, aspiration or forcing of trap seals under conditions of ordinary use.
Principle No. 12: Each vent terminal shall extend to the outer air and be so installed as to minimize the possibilities of clogging and the return of foul air to the building.
Principle No. 13: The plumbing system shall be subjected to such tests as will effectively disclose all leaks and defects in the work.
Principle No. 14: No substance which will clog the pipes, produce explosive mixtures, destroy the pipes or their joints, or interfere unduly with the sewage-disposal process shall be allowed to enter the building drainage system.
Principle No. 15: Proper protection shall be provided to prevent contamination of food, water, sterile goods and similar materials by backflow of sewage. When necessary, the fixture, device or appliance shall be connected indirectly with the building drainage system.
Principle No. 16: No water closet shall be located in a room or compartment which is not properly lighted and ventilated.
Principle No. 17: If water closets or other plumbing fixtures are installed in buildings where there is no sewer within a reasonable distance, suitable provision shall be made for disposing of the building sewage by some accepted method of sewage treatment and disposal.
Principle No. 18: Where a plumbing drainage system may be subjected to backflow of sewage, suitable provision shall be made to prevent its overflow in the building.
Principle No. 19: Plumbing systems shall be maintained in a sanitary and serviceable condition.
Principle No. 20: All plumbing fixtures shall be so installed with regard to spacing as to be reasonably accessible for their intended use.
Principle No. 21: Plumbing shall be installed with due regard to preservation of the strength of structural members and prevention of damage to walls and other surfaces through fixture usage.
Principle No. 22: Sewage or other waste from a plumbing system which may be deleterious to surface or subsurface waters shall not be discharged into the ground or into any waterway unless it has first been rendered innocuous through subjection to some acceptable form of treatment.
These basic principles provided engineering guidelines regarding the intent of the plumbing code.
