WP4V RO System Maintenance
In this page you will find:
- Filter Change Procedure
- Membrane Replacement Procedure
- Start Up Instructions
- Checking the Air Pressure in Your Tank
Note: The filter wrench pictured (P/N: 164003) may be purchased from Watts Premier to aid with twisting off filter housings (not required)
Open the RO Faucet and allow water to drain from the tank until it is completely empty.
Note: Water may be saved in a container for drinking or to rinse system parts.
Let system sit for a few minutes after tank is empty to depressurize before attempting to remove filter housings.
For more leverage you may leave the RO module attached to wall of cabinet. If you are unable to access the module while it is mounted, remove it prior to changing filters. Starting with the closest housing
(Stage 1), remove it by turning it clockwise (left), empty water, then discard filter. Continue on to the 2nd housing (Stage 2) and 3rd housing (Stage 3).
Clean the filter housings (bowls) with a mild soap solution and rinse with water. Check O-rings and lubricate with water soluble lubricant. KY Jelly® or other water based lubricants may be used. Petroleum based lubricants (such as Vaseline®) must not be used.
Before re-installing the filter bowls back on to the system, check O-rings to make sure they are still in place.
Insert the new sediment filter (cloth like appearance) into the 1st filter housing which is the one closest to the side with tubing connections
and re-install housing.
Insert the new Carbon Block filter (White End Caps) into the middle housing and re-install housings.
Open the RO faucet and leave it open until water begins to trickle out (it will come out slowly).
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
Note: ** To reset the electronic monitor during replacement of filters, slide out the battery from the base of the faucet, wait one minute and reinsert.
- Stage 1 - Sediment Filter (P/N: 104017)
- Stage 2 - Carbon Block Filter (P/N: 101009-White end caps)
- Stage 4 - VOC Carbon Block Filter (P/N: 101013 - Blue end caps)
- 1/2 Cup of hydrogen peroxide or common household bleach
Note: Sanitizing of unit is recommended.
Perform steps 1 through 3 in the 6 Month System Maintenance .
Note: If not sanitizing the system skip to step 8.
For more leverage you may leave the RO module attached to wall of cabinet. If you are unable to access the module while it hangs, remove it prior to changing filters. Starting with the closest housing (Stage 1), remove it by turning it clockwise, empty water, then discard filter. Continue on to the 2nd (Stage 2) and 3rd (Stage 4) housings.
Note: If not sanitizing the system skip to step 9.
Open the horizontal membrane housing and remove the RO membrane. Rest the membrane in a clean, sanitary place. Replace the empty membrane housing onto the unit.
Leaving the filters out, replace stage 2 and 4 empty filter housings (hand tight) onto unit. Measure & pour either 1/2 cup of hydrogen peroxide or 2 tablespoons of common household bleach into the 1st filter housing (Stage 1) and hand tighten on to unit
Turn on incoming water supply to the system at the adapt-a-valve. 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.
Turn off the incoming water supply to the system at the adapt-a-valve. Keep the RO faucet open until the storage tank is completely drained
Open the membrane vessel and insert the RO membrane back into the manifold while making sure not to kink the O-rings. Tighten the membrane housing back on the RO unit (Refer to “Membrane Replacement” below for details).
Remove filter housings Stage 1, 2 and 4 and empty of water
Insert the new sediment filter (cloth like appearance) into the 1st filter housing which is the one closest to the side with tubing connections and re-install housing
Insert the new Carbon Block filter (White End Caps) into the middle housing and re-install housing.
Insert the new VOC Carbon Block filter (Blue End Caps) into the 3rd filter housing which is the one farthest from the side with tubing connections and re-install housing.
Tip: 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 for startup directions.
Membranes have a life expectancy between 2 and 5 years, depending on the incoming water conditions and the amount the RO system is used. This reverse osmosis membrane is critical for effective reduction of total dissolved solids (TDS). The product water should be tested periodically to verify that the system is performing satisfactorily. Normally, a membrane would be replaced during a semiannual or annual filter change. However, if at any time you notice a reduction in water production or an unpleasant taste in the reverse osmosis water, it could be time to replace the membrane. Watts Premier recommends replacing the membrane when TDS reduction falls below 75%.
A water sample may be sent to Watts Premier for a free diagnosis of your membranes performance. To send a water sample, use two (2) clean containers and fill ½ cup of tap water in one container and ½ cup of reverse osmosis water in 2nd container. Clearly label each sample. Send the samples to the address listed on the cover of this manual attention “Water Samples”. Watts Premier will test the water and mail or call you with the results.
Item Needed: One Membrane - 24 GPD Membrane (P/N: 560014) OR 36 GPD (P/N 560016) OR 50 GPD (P/N 560018) OR 75 GPD (P/N 560020). - Verify what capacity membrane is currently installed in your system (There is a sticker on the membrane filter) **
**You can also use a membrane that is rate for a different GPD (gallon per day) rating. Make sure to change the flow restrictor to match the new membrane size.
Turn off the incoming water supply to the RO by turning the needle valve on the adapt-a-valve clockwise until it stops. (Follow the green tube away from the RO system to find the adapt-a-valve.)
Open the RO Faucet and allow water to drain from the tank until it is completely empty
Remove the horizontal membrane housing on top of the unit by turning it counter clockwise to loosen.
Pull firmly on the yellow RO membrane to remove it from the housing and discard
Lubricate the O-rings on the new membrane with a water soluble lubricant such as KY Jelly ®. Insert the end with the two black O-rings into the cap. Twist the membrane as you push it firmly into the manifold.
Caution: Before re-installing the membrane housing back on to the system, check O-ring on the housing to make it is still in place and lubricate with water soluble lubricant.
Replace the membrane housing onto the cap by turning clockwise. Tighten securely
Follow Start up instructions below.
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
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.
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).
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
After the storage tank has filled (the water trickling has stopped), 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.
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.
Important: Check air pressure only when tank is empty of water!
Check air pressure in the storage tank when you notice a decrease in available water from the RO system. Air can be added with a bicycle pump using the schrader valve that is located on the lower side of the tank behind the blue plastic cap
Turn off the incoming water supply to the RO.
Open the RO Faucet and allow water to drain from the tank until it is completely empty.
Tip: When water from the RO faucet slows to a trickle, with the faucet still in the open position, you may add air to the tank to purge any left over water, this will ensure that the tank is completely empty.
Once all water in the tank is purged, check air pressure using an air pressure gauge, it should read between 5 - 7 PSI. (Digital air pressure gauge is recommended)
Follow startup procedure