Section 604.1315  Vents

a)         Finished water storage structures must be vented as follows:

1)         the overflow pipe must not be considered a vent; and

2)         open construction between the sidewall and roof is not permissible.

b)         Vents must:

1)         prevent the entrance of surface water and rainwater;

2)         exclude birds and animals;

3)         exclude insects and dust to the extent practicable;

4)         on ground level structures, open downward with the opening at least 24 inches above the roof or sod and be covered with 24 mesh non-corrodible screen; and

5)         on elevated tanks and standpipes:

A)        open downward; and

B)        be fitted with either four mesh non-corrodible screen, or with finer mesh non-corrodible screen in combination with an automatically resetting pressure-vacuum relief mechanism, as required by the Agency.