TM 55-1930-209-14&P-19 Table 3-3.  Preventive Maintenance Checks and Services for ROWPU System (Continued) B - Before D - Daily Q -  Quarterly D - During W - Weekly S -  Semiannually A - After M - Monthly A -  Annually INTERVAL ITEM PROCEDURES EQUIPMENT ITEM TO BE CHECK FOR AND HAVE IS NOT READY/ NO. INSPECTED REPAIRED OR ADJUSTED AVAILABLE IF B   D   A   D  W  M   Q   S   A AS NECESSARY * * b.  Check fuse on metering pump.  Replace if Fuse blown. necessary. * * c.  Make sure coagulant and inhibitor drums Drums empty. each contain at least 2 to 3 gal of liquid. If level is low, disconnect metering pump hoses and replace drums as follows: WARNING Avoid exposure to coagulant and inhibitor. Wear safety goggles or face shield and rub- ber gloves when working around chemicals. If chemical Is swallowed, do not Induce vomiting.  Drink water and seek medical attention.  If chemical gets In eyes, flush with water and seek medical attention.  If chemical contacts skin, wash with soapy water. NOTE Pump section hose enters drum through the larger of two plastic lungs which are screwed into the drum. 1)  Remove suction hose, with suction foot valve and weight attached, from empty drum. NOTE Drum breather (vent) hose enters drum through smaller plastic lung and hangs over side. 2)  Remove breather hose. 3)  Remove empty drums and replace with full drum. CAUTION Carefully read labels on drums to insure that proper drum is being connected. Change 1      3-7