1) Shut off the source water supply to the RO system.
2) Open the RO faucet and depressurize the RO system and storage tank.
3) Remove pre-filter cartridges, post-filter cartridges, and RO membrane. Discard or prepare for cleaning. If
the RO membrane element is to be reused, disinfectant solution should be introduced into the permeate tube
outlet sufficient to remove biofilm in this vulnerable area, before reinserting the membrane into the housing.
Use 1/4 teaspoon (1 ml) of unscented 5.25% sodium hypochlorite liquid household bleach.
4) Wash the internal housing areas with warm soapy water using a clean brush (do not scratch the surface of the
housings). Be sure to clean o-ring grooves thoroughly. Remove the existing o-ring. Discard o-ring or
prepare for cleaning.
5) Rinse off all housing pieces with clean water to remove soap.
6) Replace o-rings, and lubricate with a water soluable lubricant.
KY Jelly
®
or other non petroleum water
based lubricants may be used.
.
7) Pour about 1/4 teaspoon (1 ml) of unscented 5.25% sodium hypochlorite liquid household bleach into each of
the clean housings and replace housings on the RO system.
8) Disconnect RO storage tank from the system.
9) RO storage tank cleaning procedure:
•
Tank sanitizer feeder or small filter housing with fittings and tubing
•
Disinfectant solution
•
Pressure gauge and air pump
a)
The tank should be empty. Check the air pre-charge pressure with an accurate gauge
(low pressure type 0-12 lbs.). The average tank pressure should be 5-7psi (when the tank is empty).
b)
Fill the tank sanitizer feeder with the recommended disinfectant dosage, and connect the feeder to the
water supply and RO storage tank.
c)
Turn on water supply and force water and disinfectant solution into the RO storage tank. The storage
tank should feel heavy when filled.
d)
The disinfectant solution should remain in the tank a minimum of 10 minutes. If the tank has not
been sanitized in over a year, leave the solution in for 20 to 30 minutes. Turn off the water supply
valve and the RO storage tank valve. Disconnect the sanitizer feeder, and connect the RO storage tank
to the RO unit (the tank ball valve should remain closed).
CLEANING PROCEDURES
Recommended items:
13
