TM 10-6640-238-13 4-91 5. Remove Faucet Assembly.  See Figure 4-30. a. Set switch on pump controller to OFF.  Open faucet to relieve water pressure. b. With sink removed from countertop, loosen and remove reducer fitting (8) from faucet (9). c. Remove faucet mounting nut (10) and washer (11). d. Carefully pull faucet (9) from countertop.  Place faucet and attached fittings on a working surface. INSTALL 1. Install Water Filter.  See Figure 4-28. a. Install water filter (3) to support bracket (10) and secure with two screws (8) and washers (9). b. Secure water filter (3) to piping by connecting two unions (7). c. Install filter element (6) into filter bowl (5). d. Secure filter bowl (5) using cover nut (4). e. Open prefilter valve (1) and postfilter valve (2) on each side of water filter (3). 2. Install Water Pressure Switch.  See Figure 4-29. a. Ensure water pressure range adjustable screw is set to 20 psi. b. Screw water pressure switch (1) to water piping and tighten union (3). c. Position electrical leads in water pressure switch (1) and install lock nut on conduit (2). d. Connect water pressure switch (1) electrical leads. e. Install cover onto water pressure switch (1). 3. Install Eyewash.  See Figure 4-30. a. Apply teflon tape on male fittings.  Be sure to wrap teflon tape in same direction of pipe thread. b. Connect hose (2) to eyewash (3) and tighten retaining nut (1). 4. Install Faucet Assembly.  See Figure 4-30. a. Apply teflon tape on male fittings.  Be sure to wrap teflon tape in same direction of pipe thread. b. Install faucet (9) in opening on countertop and secure with washer (11) and faucet mounting nut (10). c. Tighten reducer fitting (8) onto faucet (9). 5. Install Sink Drain.  See Figure 4-30. a. Apply teflon tape on male fittings.  Be sure to wrap teflon tape in same direction of pipe thread. b. Connect sink drain tailpiece (7) to sink (6). c. Install sink (6) into opening on countertop and snap down into place. d. Connect union (4) at top of sink trap (5). TEST Test Water System. Test water system in accordance with operating procedures listed in paragraph 2-6j. ADJUST Adjust water pressure switch (as shown on inside of cover) to turn water pump on at 10 psi and off at 20 psi.