Cross-Reference：FL-820S FL820S LF3681 B329 P550965
| Outer Diameter | 3.66 inch (93 mm) |
| Thread Size | M22 x 1.5 |
| Length | 3.58 inch (91 mm) |
| Gasket OD | 2.80 inch (71 mm) |
| Gasket ID | 2.40 inch (61 mm) |
| Efficiency 99% | 40 micron |
| Efficiency Test Std | ISO 16889 |
| Anti-Drainback Valve | Yes |
| Bypass Valve | Yes |
| Bypass Valve Setting LR | 12 psi (0.8 bar) |
| Bypass Valve Setting HR | 17 psi (1.2 bar) |
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