• When filling a top fill tank with permanently mounted piping, the outlet pipe must be properly air gapped.

• When a top fill tank without permanently mounted piping is filled through a hose, the hose outlet must be equipped with a permanent air gap fitting.

• Bottom fill tanks must be equipped with a reduced pressure assembly backflow preventer (RPA) with inlet and outlet shut-off valves. A qualified tester must test this RPA valve each month. Test results must be sent to the Distribution Water Quality & New Services Department, no later than the 1st working day of each month or the permit will be canceled.

• APPROVED AIR GAP SEPARATION

An approved air gap is a physical separation between the free flowing discharge end of a potable water supply pipeline, and the overflow rim of an open or non-pressure receiving vessel. These separations must be vertically orientated a distance of at least twice the diameter of the fill pipe, but never less that one inch.

• If splashing is a problem, attach tubular screens or cut the supply line outlet at an angle. If the supply line is cut at an angle, measure the air gap distance from the bottom of the angle.