💧 Manual Air Relief Valve, Pentair PacFab Purex, with Clamp
Made by Purex/Pentair, manufacturer part number 261003. It is listed for the equipment shown below, so check the model on your own unit against that list. If your old part carries one of the cross-reference numbers further down, this is listed as its alternative.
📏 Specifications
| Specification | Value |
|---|---|
| Brand | Purex/Pentair |
| Manufacturer part number | 261003 |
| Catalog description | Manual Air Relief Valve, Pentair PacFab Purex, with Clamp |
✅ Listed for
- Pentair/Purex SM/SMBW 4000 4024-4060 DE Filter
🔄 Cross-reference part numbers
These part numbers are listed as alternatives for this part.
| Brand | Part number |
|---|---|
| Purex/Pentair | 273550 |
California Residents WARNING: Cancer and Reproductive Harm
Exploded parts diagrams: This part is shown as item #39 on the Cartridge Filter, Pentair PacFab Sea Horse SS Tank; item #45 on the Cartridge Filter, Pentair PacFab, Sea Horse, FSH FG Tank; item #1b on the DE Filter, Pentair/PacFab, FNS Polymeric FNS24,36,48,60; item #1B on the DE Filter, Pentair/PacFab, Nautilus NS24,36,48,60,72; item #1b on the DE Filter, Pentair/PacFab, Nautilus Plus NS24,36,48,60,72 exploded parts diagrams.
🔧 Cartridge Filter, Pentair PacFab Sea Horse SS Tank – exploded parts diagram

The numbered parts below make up this assembly. Parts we stock are linked – click any to view.
| No. | Part |
|---|---|
| 39 | Manual Air Relief Valve, Pentair PacFab Purex, with Clamp ◀ this part |
| 38 | 16-110-W019K38 |
| 36 | Spacer, Pentair PacFab NS/Sea Horse/FNS, blk |
| 34 | 16-110-W019K34 |
| 33 | 14-110-1833 |
| 32 | Clamp Ring Spring, Pentair/PacFab NS |
| 31 | 14-110-1832 |
| 30 | Clamp Ring Nut, Pentair PacFab NS, |
| 29 | 16-110-W019K29 |
| 28 | Internal Spacer, Pentair PacFab |
| 27 | 16-110-W019K27 |
| 26 | Tank Base, Pentair PacFab Sea Horse/Nautilus |
| 25 | Pipe Assembly, Pentair PacFab NS, Lower, with Drain |
| 24 | Cartridge Support, Pentair PacFab Sea Horse 400 |
| 23 | 16-110-W019K23 |
| 22 | 16-110-W019K22 |
| 21 | O-Ring, 2-3/8" ID, 3/16" Cross Section, Generic |
| 20 | 16-110-W019K20 |
| 19 | O-Ring, Pent PacFab Sea Horse/FNS/Nautilus, Bulkhead, O-409 |
| 18 | External Spacer, Pentair PacFab NS/Sea Horse/FNS |
| 17 | 16-110-W019K17 |
| 16 | 17-110-1599 |
| 15 | Clamp Ring, Pentair PacFab NS |
| 14 | O-Ring, Pent/PacFab, Sea Horse/Nautilus, 18"Tank Body, O-184 |
| 13 | 16-110-W019K13 |
| 12 | O-Ring, Buna-N, 2-3/16" ID, 3/32" CrossSection, Generic |
| 11 | Retaining Ring, Pentair PacFab NS, 18" |
| 10 | Manifold, Pentair PacFab Sea Horse |
| 9 | 16-110-W019K9 |
| 8 | Bleed Tube, Pentair PacFab Sea Horse |
| 7 | Air Relief Strainer, Pentair PacFab |
| 6 | Top Spacer, Pentair PacFab |
| 4 | 16-110-W019K4 |
| 3 | 17-110-1581 |
| 2 | O-Ring, 5/16" ID, 3/32" Cross Section, Generic |
| 1 | 16-110-W019K1 |
🔧 Exploded diagram and parts
This part belongs to the Cartridge Filter, Pentair PacFab Sea Horse SS Tank assembly. Everything listed below is something we stock for it, and the numbers match the diagram.
Parts that go with this
| Part | Our part number | Availability | Price | ||
|---|---|---|---|---|---|
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Silicone Based Lubricant 1oz 00150 | 00150 | 343 in stock | $5.26 | Add to cart |

































