(b) Backflow prevention.*

1. (1) Except as specified in subdivisions (b)(2) and (3) of this section, a direct connection may not exist between the sewage system and a drain originating from equipment in which food, portable equipment, or utensils are placed. ^P
2. (2) Subdivision (b)(1) of this section does not apply to floor drains that originate in refrigerated spaces that are constructed as an integral part of the building.
3. (3) If allowed by law, a warewashing machine may have a direct connection between its waste outlet and a floor drain when the machine is located within one and one-half meters (1.5 m) (five feet (5’)) of a trapped floor drain and the machine outlet is connected to the inlet side of a properly vented floor drain trap.
4. (4) If allowed by law, a warewashing or culinary sink may have a direct connection.

(e) Removing mobile food establishment, seasonal, pushcart, and coffee kiosk wastes.

1. (1) Sewage and other liquid wastes shall be removed from a mobile food establishment, pushcart, or coffee kiosk food establishment at an approved waste servicing area or by a sewage transport vehicle in such a way that a public health hazard or nuisance is not created. ^Pf
2. (2) These food establishments in subdivision (e)(1) of this section must have a written agreement with the approved waste disposal site. ^Pf