Conical O-ring for the quartz sleeve — also called a quartz tube — on older Katadyn ultraviolet disinfection systems. The conical form is the point to check before ordering: it seats on a tapered face rather than in a square groove, so a standard round-section O-ring of the same nominal size will not seal in this position. It sits on the boundary between the treated water and the dry lamp compartment and is a single-use item. Reference number 1198-0309.
| Product type | O-ring |
| Component type | Quartz sleeve O-ring |
| Profile | Conical (tapered seat) |
| Fits | Older Katadyn UV disinfection systems |
| Important | Not interchangeable with a standard round-section O-ring |
| Service note | Single use; renew whenever the sleeve is withdrawn |
| Condition | New replacement part |
| Reference number | 1198-0309 |
| HS code | 7020.00 |
| Part number | 1198-0309 |
| MOQ | 1 |
Part is for listed systems. For other UV systems, provide serial number to confirm compatibility.