💧 Air Bleed Filter, Pentair Sta-Rite DES/DEP/DEPB/HRP/HRS
Made by StaRite/Pentair, manufacturer part number WC8-126Z. 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 | StaRite/Pentair |
| Manufacturer part number | WC8-126Z |
| Catalog description | Air Bleed Filter, Pentair Sta-Rite DES/DEP/DEPB/HRP/HRS |
✅ Listed for
- StaRite System 3 S7M120/M400 & S8M150/M500 Cartridge Filter
- StaRite DES36 DES36-01 DES36-01B DE Grid Assy
- StaRite DES51 DES51-01 DES51-01B DE Grid Assy
- StaRite DES60 DES60-01 DES60-01B DE Grid Assy
- StaRite DEP25 DE Grid Assy
- StaRite DEP36 36-01 36-01B 36 36-1N DE Grid Assy
- StaRite DEP51 51-01 51-01B 51 51-1N DE Grid Assy
- StaRite DEP83 83-01 83-01B 83 83-1 83-1N DE Grid Assy
- StaRite High Rate HRP20-01B 24-01B 30-01B Sand Filter
- StaRite High Rate HRPB20 HRPB24 HRPB30 Sand Filter
- StaRite High Rate HRS16-01 20-01 24-01 Sand Filter
- StaRite System 3 S7S50 & S8S70 Sand Filter
🔄 Cross-reference part numbers
These part numbers are listed as alternatives for this part.
| Brand | Part number |
|---|---|
| StaRite/Pentair | 25021-0004 |
| StaRite/Pentair | WC8-35 |
Exploded parts diagrams: This part is shown as item #5 on the Cartridge Filter, StaRite Posi-Flo, TX & TXR; item #15 on the Cartridge Filter,Pentair/StaRite Posi-Flo II,PTM50/70/100; item #10 on the DE Filter, StaRite/Swimquip, DEP Vertical DEP36/51/83/-01B; item #10 on the DE Filter, StaRite/Swimquip, DEPB Vert DEPB36-DEPB83-1N; item #14 on the DE Filter, StaRite/Swimquip, DES Vertical DES25-01-DES60-01; item #9 on the DE Grid Assy, StaRite, DES25, DES25-01, DES25-01B; and 11 other assemblies exploded parts diagrams.
🔧 Cartridge Filter, StaRite Posi-Flo, TX & TXR – exploded parts diagram

The numbered parts below make up this assembly. Parts we stock are linked – click any to view.
| No. | Part |
|---|---|
| – | Tool, Socket, Quad-Side A/Solar Side B |
| – | Tool, Clamp Knob Socket, 4-Lobe, w/1/4" Socket Bit Adapter |
| 18e | 16-102-W001K18E |
| 18d | 16-102-W001K18D |
| 18c | 16-102-W001K18C |
| 18b | 16-102-W001K18B |
| 18a | 16-102-W001K18A |
| 17 | Clamp Ring Nut, Pentair Sta-Rite, Brass |
| 16 | 16-102-W001K16 |
| 15 | Clamp Ring, Pentair Sta-Rite PosiFlo TX |
| 14 | O-Ring, Sta-Rite Posi-Flo, Upper Tank Body, O-443 |
| 13 | 17-102-1001 |
| 12 | 16-102-W001K12 |
| 11 | 16-102-W001K11 |
| 10 | Clamp Ring, Pentair Sta-Rite PosiFlo TX, with out Nut |
| 9 | Clamp Ring Nut, Pentair Sta-Rite, Plastic |
| 8 | O-Ring, 9-1/2" ID, 1/4" Cross Section, Generic |
| 7 | 16-102-W001K7 |
| 6 | 16-102-W001K6 |
| 5 | Air Bleed Filter, Pentair Sta-Rite DES/DEP/DEPB/HRP/HRS ◀ this part |
| 4 | Strap, Pentair Sta-Rite PosiFlo TX |
| 3 | 16-102-W001K3 |
| 2 | Pressure Gauge Screen, Pentair Sta-Rite |
| 1 | 16-102-W001K1 |
🔧 Exploded diagram and parts
This part belongs to the Cartridge Filter, StaRite Posi-Flo, TX & TXR assembly. Everything listed below is something we stock for it, and the numbers match the diagram.
| No. | Part | Our part number | Availability | Price | ||
|---|---|---|---|---|---|---|
| 9 | ![]() |
Clamp Ring Nut, Pentair Sta-Rite, Plastic | WC36-22 | Available to order | $11.25 | |
| 10 | ![]() |
Clamp Ring, Pentair Sta-Rite PosiFlo TX, with out Nut | WC19-43 | 3 in stock | $83.63 | Add to cart |
Complete tools
| Part | Our part number | Availability | Price | ||
|---|---|---|---|---|---|
![]() |
Tool, Clamp Knob Socket, 4-Lobe, w/1/4" Socket Bit Adapter | MT-501 | 1 in stock | $35.79 | Add to cart |
Parts that go with this
| Part | Our part number | Availability | Price | ||
|---|---|---|---|---|---|
![]() |
Center Rod, Pentair Sta-Rite S7D75/S8D110/DES/DEP | 23900-0039Z | Available to order | $57.91 |














