TM 5-4610-223-12 Table 2-2.  Feed and Flow Indicators and Pressure Gages Startup Normal Symbol Location Function Type and size Position Operating position PG-1 Aspirator Indicates discharge Dial pressure indicator. 0-30 5-7 psi manifold. pressure from raw water aspirator manifold. PG-2 Mounted on Indicates influent Dial, pressure indicator. 0-100 psi 0-65 psi recirculation filter pump pressure. filter line between filter and flow con- troller valve, PG-3 Mounted on re- Indicates effluent Dial, pressure 0-100 psi 0-65 psi circulation filter pump pressure. filter line from filter to flow controller valve. FLI-4 Mounted in raw Determines rate of Flow indicator. 0-50 gpm 50-gpm water line. raw water Influent flow. FEI-5 Mounted on left Regulates rate of feed Feed indicator. 0-100% 30 ppm side of slurry for diatomaceous capacity. feeder tank, earth slurry. FEI-6 Mounted on right Regulates rate of feed Feed indicator. 0-100% 50 ppm side of slurry for limestone slurry. capacity. tank. FEI-7 Chemical solution Regulates rate of feed Feed indicator. 1/2 to 2 1/2  30 ppm feeder. for ferric chloride gph solution. FEI-8 Chemical solution Regulates rate of feed Feed indicator. 1/2 to 2 1/2  6 ppm feeder. for calcium hypo- gph chloriate solution. 2-6