§ 50.40 SPECIFICATIONS; TABLES.

   (A)   Table specifying minimum air gaps for generally used plumbing fixtures.

	Minimum Air Gap
Fixture	When Not Affected by Near Wall (Inches)*	When Affected by Near Wall (Inches)**
Drinking water fountains, single orifice 0.437-inch diameter or multiple orifices having total area of 0.150 square inch (area of 0.437-inch diameter)	1	1.5
Effective openings greater than one inch	(See notes to table)***	(See notes to table)****
Lavatories and other fixtures with effective openings not greater than one-half inch diameter	1	1.5
Over-rim bath fillers and other fixtures with effective openings not greater than one-inch diameter	2	3
Sinks, laundry trays, goose-neck bath faucets, and other fixtures with effective openings not greater than three-fourths inch diameter	1.5	2.25
Notes to table: *      Side walls, ribs, or similar obstructions do not affect air gaps when spaced from inside edge of spout opening a distance greater than three times the diameter of the effective opening for a single wall, or a distance greater than four times the diameter of the effective opening for two intersecting walls. **      Vertical walls, ribs, or similar obstructions extending from the water surface to or above the horizontal plane of the spout opening require a greater air gap when spaced closer to the nearest inside edge of spout opening than specified in Note 1 above. The effect of three or more such vertical walls or ribs has not been determined. In such cases, the air gap shall be measured from the top of the wall. ***      Two times the diameter of effective opening. ****   Three times the diameter of effective opening.

 

   (B)   Table specifying the maximum capacity of the water supply line to the tank.

Maximum Capacity of Water Supply Line to Tank	Diameter of Overflow Pipe (Inches ID)
0-50 gpm	2
50-100 gpm	2.5
100-200 gpm	3
200-400 gpm	4
400-700 gpm	5
700-1,000 gpm	6
Over 1,000 gpm	8

 

(Prior Code, § 8-4-6) (Ord. 428, passed 7-1982) Penalty, see § 50.99