18-29-1002.1.3 Animal facilities and barn drainage.

   All wastes from barns, stables, animal facilities or yards for animals shall be intercepted before entering the sewer by an interceptor or catch-basin, which shall be trapped and covered with a tight iron cover, and such catch-basins, if within buildings, shall be provided with a vent not less than 3 inches (75 mm) in diameter carried through the roof. All floor drains and wash racks shall be provided with deep seal traps and heavy strainers.

18-29-1002.1.4 Basement floor drains.

   Basement floor drains shall connect into a trap so located and constructed that it can be readily cleaned and of a size to serve the purpose for which it is intended but in no case less than 2 inches (51 mm) in diameter. The drain inlet shall be accessibly located.

(Amend Coun. J. 10-14-21, p. 37722, Art. X, § 2)

18-29-1002.1.5 Backwater valves.

   See Section 18-29-715, Backwater Valves.

18-29-1002.2 Design of traps.

   Fixture traps shall be self-scouring. Fixture traps shall not have interior partitions, except where such traps are integral with the fixture or where such traps are constructed of an approved material that is resistant to corrosion and degradation. Slip joints shall be made with an approved elastomeric gasket and shall only be installed on the trap inlet, trap outlet and within the trap seal.

18-29-1002.3 Prohibited traps.

   The following types of traps are prohibited:

   1.   Traps that depend on moving parts to maintain the seal;

   2.   Bell traps;

   3.   Crown-vent traps;

   4.   Separate fixture traps that depend on interior partitions for the seal, except those traps constructed of an approved material that is resistant to corrosion and degradation;

   5.   "S" traps;

   6.   Drum traps;

   7.   Building (house) traps in sanitary sewers.

18-29-1002.4 Trap seals.

   Each fixture shall have a liquid seal of not less than 2 inches (50 mm) and not more than 4 inches (100 mm), or deeper for special designs relating to accessible fixtures. Where a trap seal is subject to loss by evaporation, a deep-seal trap consisting of a 4-inch (100 mm) seal is required, or other means shall be provided to prevent loss of trap seal. Other means shall include: automatic trap seal primers conforming to ASSE 1018 or ASSE 1044, or vegetable or mineral oil added to the trap.

18-29-1002.5 Size of fixture traps.

   Fixture trap size shall be not less than the size indicated in Table 18-29-709.1. A trap shall not be larger than the drainage pipe into which the trap discharges.

18-29-1002.6 Deliberately omitted.