This TGI Pure replacement O-ring (model FH-ORING-3BB) ensures a proper seal for Watts Intelifil GTS Big Blue filter housings with its precision 5.5-inch diameter and 1/8-inch cross-section. Engineered specifically for models GTS-221 through GTS-228, this component prevents leaks and maintains system integrity during filter changes.
SPECIFICATIONS
Technical Details
| Manufacturer | Watts (TGI Pure) |
| Model Number | FH-ORING-3BB |
| O-Ring Diameter | 5.5 inches |
| Cross-Section | 1/8 inch |
| Application | Big Blue housing seal |
| Housing Series | Intelifil GTS Big Blue |
| Compatible Models | GTS-221, GTS-222, GTS-223, GTS-224, GTS-225, GTS-226, GTS-227, GTS-228 |
| Material | Rubber |
INSTALLATION & USE
Replacing Your Housing O-Ring
- Turn off water supply and relieve system pressure before unscrewing the housing sump from your GTS Big Blue filter housing.
- Remove the old O-ring from the groove in the housing cap, cleaning any debris or residue from the channel with a clean cloth.
- Place the new FH-ORING-3BB O-ring into the groove, ensuring it sits evenly without twists or kinks around the entire circumference.
- Lightly lubricate the O-ring with food-grade silicone grease before threading the sump back onto the housing cap hand-tight.
- Restore water pressure slowly and inspect the connection for any signs of leakage before returning the system to full operation.
COMPATIBILITY
Verified Housing Fit
This O-ring is designed exclusively for Watts Intelifil GTS Big Blue housings models GTS-221, GTS-222, GTS-223, GTS-224, GTS-225, GTS-226, GTS-227, and GTS-228. It will not fit the GTS-251 or GTS-252 models, which require a different O-ring size. Always verify your housing model number before ordering to ensure proper fit and seal performance.
🔧 Pro tip: Replace your housing O-ring every 2-3 filter changes or annually, whichever comes first. Even if the old O-ring looks fine, rubber degrades over time and a new seal costs far less than water damage from a slow leak.
