SpectraPure
®
SpectraPure
®
Inc.
480.894.5437 Call us toll-free 1.800.685.2783
2167 East Fifth St, Tempe, Arizona 85281
12
MAINTENANCE PROCEDURES
SANITIZING THE RO/DI SYSTEM WITH DWK
Sanitizing is recommended at least once every year or if water smells (or tastes) bad even after a post carbon filter
replacement. A convenient time for sanitization is during a filter changeout. IT IS IMPORTANT THAT YOU HAVE CLEAN
HANDS WHILE HANDLING INNER PARTS OF THE SYSTEM.
1. Be sure water supply to the RO/DI system is turned off, and the dispenser faucet is open. This will completely
drain the pressure tank. Block the water flow to drain by doubling-over the yellow tubing and secure with wire
or a “Ty-Rap”.
2. Next, remove the 1/4" black tubing from the feed port of the membrane and lift membrane housing from clips.
3. Remove the membrane housing cap by unscrewing it counterclockwise. Grasp the membrane stem with a pair
of pliers and pull the membrane from the housing.
4. Screw the cap back on to the membrane housing making sure that the o-rings are in place.
5. Reconnect the 1/4" black tubing to the feed port of the membrane.
6. Remove sediment, carbon block, deionization cartridge and in-line post carbon filter.
7. Put 1.5 - 2.0 oz. of household bleach in the left filter housing and fill it halfway with tap water. Now, put all filter
housings back on the bracket, keeping the one with the bleach on the left side.
8. Next, close the dispenser faucet (put lever in DOWN position).
9. Open feed supply valve 1/4 turn from closed position. Open the dispenser faucet.
10. Allow 15 minutes for the bleach solution to flow through the system. Then, open dispenser faucet and keep
the lever in the UP position until some bleach solution is dispensed through the faucet. IMMEDIATELY close the
faucet as soon as the bleach solution appears. This will sterilize the faucet and the line going to the faucet.
11. Let the system sit for 2 hours.
12. Open the dispenser faucet to drain bleach solution from the pressure tank as completely as possible and then
close the faucet.
13. Open the feed supply valve fully.
14. Allow the tank to fill until pressure gauge reaches 40 psi. Then open the dispenser faucet and flush system until
all bleach solution has been dispensed from the system.
15. Close the feed supply valve.
16. Remove filter housings and membrane housings from the system and then rinse them with tap water and drain
them completely.
17. Put new replacement filters (sediment filter, carbon block filter and inline post carbon filter) into the filter housings
and put the membrane back into the membrane housing. You can use the same deionization cartridge if the DI
cartridge has not been exhausted.
Open the feed supply valve and check for leaks. This completes the procedure.
RECHARGING THE BLADDER TANK
If the storage capacity of the tank is diminished significantly it is likely that the tank has lost its air charge. Recharging
the bladder tank will restore its capacity.
1. Be sure water supply to the RO/DI system is turned off, and the dispenser faucet is open (lever in up position).
2. Leave the faucet in the open position unil the procedure is completed.
3. Drain as much water as possible from the tank. If there is no air charge remaining, very little water will come out.
4. Connect an air pump to the “schrader” (tire) valve on the pressure tank and start pumping air into the tank.
5. Expel all the water from the tank.
6. Continue pumping air into the tank until the pressure reads NO MORE than 7 PSI.
7. This completes the procedure. Turn system back on.
NOTE: Should this procedure fail to restore the capacity of the tank, it is very likely that the bladder in the tank is
ruptured and the tank needs replacement.
