Culligan
Filter Set With Membrane for Culligan AC-50 Reverse Osmosis System
$59.99
This complete filter set restores your Culligan AC-50 reverse osmosis system with three filtration stages plus a 50 GPD membrane. Includes sediment prefilter, carbon block, GE Desal TFM-50A membrane, and K2333-KK inline post filter.
SPECIFICATIONS
Filter Set Components & Technical Details
| Compatible System | Culligan AC-50 Reverse Osmosis System |
| Number of Components | 4 pieces (3 filters + 1 membrane) |
| Membrane Type | GE Desal TFM-50A, 50 GPD thin film composite |
| Sediment Filter | Stage 1 particulate removal cartridge |
| Carbon Block Filter | Stage 2 chlorine and chemical reduction |
| Post Filter | K2333-KK inline carbon filter, 3/8" QC (standard) |
| Post Filter Note | Some AC-50 units require 1/4" QC version |
| Replacement Interval | Filters 6-12 months, membrane 24-36 months |
INSTALLATION & USE
How to Replace Your AC-50 Filters
- Turn off water supply and depressurize the system by opening the faucet until water stops flowing
- Remove old sediment and carbon block filters from housings, then install new cartridges and hand-tighten housings
- Replace the membrane in the RO housing by unscrewing the cap, removing the old TFM-50A, and inserting the new GE Desal membrane
- Replace the inline post filter by disconnecting quick-connect fittings and snapping the new K2333-KK filter into place
- Turn water supply back on, check for leaks, and flush system for 10 minutes before use
COMPATIBILITY
System Compatibility & Sizing
This filter set is designed specifically for Culligan AC-50 reverse osmosis systems. Most AC-50 models use the 3/8 inch quick-connect inline post filter included in this set. A small number of AC-50 units were manufactured with 1/4 inch quick-connect fittings instead. If you have a 1/4 inch QC system, contact us before ordering so we can substitute the correct inline filter size. All other components are universal across all AC-50 configurations.
🔧 Pro tip: Before ordering, check your current inline post filter where it connects to the faucet line. If the quick-connect fitting is smaller than a pencil diameter, you have the 1/4 inch version and should call to confirm which filter you need.
