SpectraPure DWS Series, Instructions Manual

SpectraPure

®

SpectraPure

®

Inc.

480.894.5437   Call us toll-free  1.800.685.2783    

2167 East Fifth St,    Tempe, Arizona   85281

20

SANITIZING THE RO SYSTEM (once a year)                                                                                           

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 drinking water system is turned off, and the dispenser faucet is open. This will completely 

drain the pressure tank.

2.  Next, remove the 1/4" black tubing from the feed port of the membrane and lift membrane housing from clips. (See 

“RO Membrane Replacement” on previous page.)

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, GAC post carbon filter (DWS-90 and DWS-PP-90) and inline post carbon (MPDW-90) 

filters.

7.  Put 1.5 - 2.0 oz. of household bleach in the leftmost filter housing and fill it halfway with tap water. Put all filter 

housings back on the bracket, keeping the one with the bleach on the left side.

8.  Close the dispenser faucet (put lever in DOWN position). 
9.  Open feed supply valve 1/4 turn from closed position.

10.  Allow 15 minutes for the bleach solution to flow through the system. Open the 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 is dispensed. 

11.  Let the system sit for 2 hours. This will sterilize the faucet and the line going to the faucet.
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, close the ball valve on the tank, and open the faucet to relieve system pressure.
16.  Remove filter housings and membrane housings from the system, 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.

18.  Reinstall the housings back on the system.
19.  Close the faucet, open the ball valve on the tank, and open the feed valve.

CAUTION: 

Be sure to check the system for leaks before allowing it to run unattended.