(a)

1. (1) A flow meter shall be installed after the filter system but before the drip dispersal field.
2. (2) The flow meter shall incorporate not only a rate-of-flow gauge but also a “total gallons pumped” register.
3. (3) The flow-rate gauge and “total gallons pumped” register may be separate devices.

4. (4) The flow meter shall be installed in a protective box that will be of sufficient size:

   1. (A) For servicing the meter; and
   2. (B) To allow easy access for reading the meter.
5. (5) The flow meter shall be sized for the dispersal flow as well as the additional field flushing volume.

(b)

1. (1) Pressure gauges shall be located:

   1. (A) Before the filter;
   2. (B) After the filter; and
   3. (C) On the dispersal field return line.
2. (2) Pressure gauges shall be enclosed in the headworks box that allows easy access for observation.

3. (3) The gauges shall be:

   1. (A) Liquid-filled; and
   2. (B) A minimum of three inches (3”) in diameter.
4. (4) The pressure range of the gauge shall be sufficient for the maximum pressure that will be expected in the system.