US Petrolon Industrial, Inc. (USPI) High Pressure Refrigeration Inline Filtration Unit. Model: S1000AMM. Designed to be used inline with NH3 Ammonia, R-22 Freon, R-570, etc. screw and reciprocating compressors. Removes both solids and moisture from compressor fluids. Installs with two isolation ball valves. Helps restore oil to cleaner levels which extends the compressor life. The single unit is designed for reservoirs 1-120 gallons. Weight varies: 85-185 lbs. Dimensions: 24 in. W x 17 in. D x 41.5 in H. (ACN3)