The Pura UV 151121 O-Ring is the factory replacement seal for UV-1 sump housings, ensuring a watertight connection between the sump and cap assembly. This precision-molded component prevents leaks and maintains proper pressure in your Pura UV disinfection system.
SPECIFICATIONS
Technical Details
| Manufacturer | Hydrotech (Pura UV) |
| Part Number | 151121 |
| Compatible System | Pura UV-1 Sump |
| Material | Durable elastomer compound |
| Function | Sump seal and pressure gasket |
| Replacement Cycle | Every lamp change or annually |
| Temperature Range | 40°F to 100°F operating |
| Application | UV water disinfection systems |
INSTALLATION & USE
Replacing the Sump O-Ring
- Shut off water supply and depressurize the UV system before disconnecting the sump from the cap assembly
- Remove the old O-ring from the groove in the sump rim, clean the seating surface thoroughly with a lint-free cloth to remove any debris or mineral buildup
- Lightly lubricate the new 151121 O-ring with food-grade silicone grease and seat it evenly in the groove, ensuring no twists or pinches
- Reattach the sump to the cap assembly and hand-tighten firmly, then restore water pressure and check for leaks around the seal
COMPATIBILITY
System Fit
This Pura UV 151121 O-Ring is engineered specifically for the UV-1 sump housing used in Pura and Hydrotech ultraviolet disinfection systems. It is not interchangeable with other UV system models or generic O-rings due to precise diameter and cross-section requirements. Always verify your sump model before ordering replacement seals to ensure proper fit and leak-free operation.
🔧 Replace the O-ring every time you change the UV lamp or at least once per year. Even if it looks fine, elastomer seals lose resilience over time and can cause slow leaks that damage electronics or reduce disinfection performance.
