If provided, a water tank vent shall terminate in a downward direction and shall be covered with:
- (1) 16 mesh to 25.4 mm (16 mesh to 1 inch) screen or equivalent when the vent is in a protected area; or
- (2) A protective filter when the vent is in an area that is not protected from windblown dirt and debris.
Added at 23 Ok Reg 2358, eff 6-25-06