TM 55-1930-209-14&P-19 Table 3-1.  ROWPU System Components (Continued) Component Quantity Function Location Temperature gauge 1 per Monitors incoming sea- Aft of pretreatment T1 ROWPU water temperature skid between RO18 and F1 Product water 1 per Measures flow of Aft of RO block flowmeter F2 ROWPU product water to assembly storage tanks Sight glass 1 per Indicates presence of Brine discharge flow indicator ROWPU water flow from RO block line Media filter 3 per Filters water from Between pretreat- ROWPU seawater pump before ment skid cartridge entering cartridge filter assembly and HP filter assembly pump skid Cartridge filter 1 per Filters water from Mounted on pre- assembly ROWPU media filters before treatment skid it enters HP pump HP pump 1 per Boosts pressure of Aft of media assembly ROWPU chemically treated filters and RO seawater to high block assembly level required for RO block processing RO block assembly 1 per Processes chemically Inboard of media ROWPU treated seawater filters from HP pump Hydrakleen-20 1 per Cleans RO membrane Inboard of Hydrapol (55 gallon ROWPU elements 50 drum cleaning agent drum) Chemical metering 2 per Adds measured amounts of On top of pretreat- pumps ROWPU chemicals (coagulant aid ment skid and inhibitor) to feedwater Hydrapol-50 1 per Added to seawater as Forward of pre- (55 gallon ROWPU a coagulant aid before treatment skid coagulant drum) entering media filters Hydrapol-100 1 per Added to seawater as Outboard of Hydrapol (55 gallon ROWPU a scale inhibitor before 50 drum inhibitor drum) entering cartridge filter assembly Change 1      3-2