GE Osmonics F-801 Operation And Maintenance Manual page 50

4. Carefully remove the housing (bottom part) from its head. Empty the water and
used pre-filter cartridge.
5. Inspect the central core of the used pre-filter for dirt or rust. If discoloration is
present in the cartridge interior, the filter has been in service too long and
should be replaced sooner, or at a delta pressure lower than 8 PSI.
6. Check the O-ring in the groove of the filter housing. Replace the O-ring (GE
Osmonics p/n 40694) if it appears worn or damaged.
7. Clean and rinse the pre-filter housing.
a. Optional; a 1% bleach solution may be used to sanitize the housing, rinse
thoroughly.
8. Insert the new pre-filter cartridge into the housing. Ensure that the pre-filter is
firmly in place.
9. Re-install the housing, tighten clockwise.
10. Turn ON the feed water and check for leaks. This will also purge the air from
the pre-filter housing.
11. If there are no leaks, the RO system is ready for use.
12552e – 27 Feb 04
F-801 Internal RO System by GE Osmonics
4- 10 Routine Maintenance