Exploded parts diagram: This part is shown as item #15 on the Pentair PacFab 1-1/2″ Brass Backwash Valve exploded parts diagram.
🔧 Pentair PacFab 1-1/2" Brass Backwash Valve – exploded parts diagram

The numbered parts below make up this assembly. Parts we stock are linked – click any to view.
| No. | Part |
|---|---|
| 18 | 26-110-W045K18 |
| 17 | Shaft, Pentair PacFab 1-1/2" Backwash Valve |
| 16 | E-Clip, PacFab 2" Slide Valve, Stainless Steel, Generic |
| 15 | O-Ring, Pent PacFab Brass Backwash Valve,1-1/2" Piston,O-211 ◀ this part |
| 14 | Plug, Pentair PacFab 1-1/2" and 2" Backwash Valves |
| 13 | Washer, Pentair PacFab 1-1/2" Backwash Valve |
| 12 | 27-110-1588 |
| 11 | O-Ring, 3/8" ID, 3/32" Cross Section, Generic |
| 10 | 27-110-1586 |
| 9 | Screw,Pent PacFab 1-1/2" & 2" Backwash Valve, 10-24 x 1-1/2" |
| 8 | 27-110-1294 |
| 7 | Screw,Pent PacFab 1-1/2" & 2" Backwash Valve,1-1/4-20 x 1/4" |
| 6 | 27-110-1584 |
| 5 | Nut, Pentair PacFab 1-1/2" and 2" Backwash Valve, 1/4-20 |
| 4 | Nut, Pentair PacFab 1-1/2" and 2" Backwash Valve, 10-24 |
| 3 | Gasket, Pentair PacFab 1-1/2" and 2" Backwash Valve, Cap |
| 2 | 27-110-1550 |












