Annual Maintenance

Desert Mountain Water LLC 5 Stage RO System















Stage 1 – Sediment Filter
Stage 2 – Carbon Block Filter 
Stage 3 – Carbon Block Filter 2
Stage 4- Membrane (See addition pages for membrane replacement.)
Stage 5 – 10” Final Polishing filter 

Step 1: Perform steps 2 through 5 in the Six Month System Maintenance

Step 2: Remove the RO membrane from its housing and rest in a clean sanitary place. (Refer to “Membrane Replacement” section on page 16 for directions on removing the membrane). Replace cap onto empty membrane housing and re-connect green tubing.

Step 3: Leaving the filters out, replace stage 2 and 3 empty filter housings (hand tight) onto unit. Measure & pour either 1/2 cup of hydrogen peroxide or common household bleach into the 1st filter housing (Stage 1) and hand tighten onto unit.

Step 4: With the RO faucet in the closed position turn on the incoming water supply to the system. Wait 1 minute for the unit to pressurize. Turn on the RO faucet and let the water run for 30
seconds. Turn off the RO faucet and let the unit rest for 2 minutes. Finally, open the RO faucet and let the water run for 5 more minutes.

Step 5: Turn off the incoming water supply to the system. Keep the RO faucet open until the storage tank is completely drained.

Step 6: Open the membrane housing and re-install the RO membrane while making sure not to kink the O-rings. (Refer to “Membrane Replacement” section on page 16 for directions on installing the membrane). Tighten the cap back on the housing and reconnect green tubing.

Step 7: Remove filter housings Stage 1, 2 and 3 and empty of water.

Note: Before re-installing the filter bowls back on to the system , check O-rings to make sure they are still in place and lubricate with water soluble lubricant.

Step 8: Insert the new sediment filter (cloth like appearance) into the 1st filter housing which is the one on the water inlet side (green tubing from the adapt-a-valve) of the RO system and re-install housing.

Step 9: Insert the new Carbon Block filter (White End Caps) into the 2nd and 3rd housing and re-install housing.

Step 10: The final in-line filter is located on the blue tube between the storage tank and the RO faucet. Remove it by loosening the compression fittings on both ends of the filter and replace with
new filter. (Discard used final filter after sanitizing)

Step 11: The arrow on the final filter must be pointing towards the RO faucet / away from the RO storage tank.

Note: This is a good time to check the air pressure in your storage tank. 

Follow Steps 8 through 10 in the Six Month System Maintenance (Page 14) for startup directions.

Start up Instructions

Step 1: Turn on the incoming cold water at the angle stop valve and the Adapt-a-Valve. Check the system for leaks and tighten any fittings as necessary. (Check frequently over the next 24 hours to ensure no leaks are present).

Note: If you have connected your RO system to a refrigerator / ice maker, make sure the ice maker is off (do not allow water to flow to the ice maker) until flushing (Step 4) is complete and the tank has been allowed to fill completely. Connection from the RO to the ice maker system should have an in-line valve installed before the ice maker so it can easily be closed to prevent water
flowing to the ice maker during start up and periodic maintenance. Your storage tank must be allowed to fill up fully in order for the ice maker system to work properly.

Step 2: Open the RO faucet and leave it open until water begins to trickle out (this may take a few minutes and the water will come out slowly).

Step 3: Close the RO faucet allowing the storage tank to fill with water. It may take 3 to 6 hours to fill the tank completely depending on the production capability of the membrane, local water temperature and water pressure.

Note: During the fill period you may hear water trickling which is a normal occurrence.

Step 4: After the storage tank has filled open the RO Faucet to flush the tank completely. You will know that the tank is empty when the flow rate from the RO faucet is down to a trickle. Repeat this step two more times. The fourth tank can be used for drinking.

Note: The flushing process should take about a day to complete.

Note: Flushing of the tank 3 times is only necessary during the initial startup and after replacing the membrane.