Pentair · Filters
Pentair System 3 modular media (SM series) parts
OEM part numbers for the Pentair System 3 modular media cartridge filters (S7M120, S7M400, S8M150, S8M500), from Pentair's 2021 filter parts catalog.
Upfront pricing · many common repairs and installations have a set price, given before any work starts
Choose a part from the list below to see its part number and details.
Parts list
No diagram for this model yet. Every part number below is checked against Pentair’s own documentation. Choose a part from the list to see its details.
Pick a part
Tap any number on the drawing to see its OEM part number, which models it fits and what commonly goes wrong with it.
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Parts list
| Ref. | Part | Part no. |
|---|---|---|
| 1 | 33600-0023T | |
| 2 | 154689Z | |
| 3 | 35202-0959 | |
| 4 | 24900-0504 | |
| 5 | 35505-1423 | |
| 6a | 25022-0201S | |
| 6b | 25022-0224S | |
| 6c | 25022-0203S | |
| 6d | 25022-0225S | |
| 7a | 25021-0200S | |
| 7b | 25021-0223S | |
| 7c | 25021-0202S | |
| 7d | 25021-0224S | |
| 8 | WC8-126Z | |
| 9 | 25021-0003 | |
| 10 | 25021-0101 | |
| 11 | 35505-1428 | |
| 12 | 35505-1429 | |
| 13 | 25021-0100 | |
| 14 | 35505-1425 | |
| 15 | 35505-1424 | |
| 16 | 24900-0509 | |
| 17 | 27001-0022 | |
| 18 | 24900-0503 | |
| 19 | 24752-0050 | |
| 20 | 24850-0200 | |
| 21 | 24850-0010 | |
| 22a | 24850-0102S | |
| 22b | 24851-0103S | |
| 23a | 24850-0008 | |
| 23b | 24850-0009 | |
| 24a | 24851-9000 | |
| 24b | 24851-9001 | |
| 25 | 24850-0105 | |
| 26a | 170145 | |
| 26b | 170146 | |
| 26c | 170147 | |
| 26d | 170148 | |
| n1 | 24850-0016 | |
| n2 | U212-252DS | |
| n3 | U11-196PSZ | |
| n4 | U11-200PSZ | |
| n5 | U9-362 | |
| n6 | 25021-0021 |
About the Pentair System 3 modular media (SM series)
Pentair's 2021 parts catalog lists the System 3 SM series modular media filters S7M120, S7M400 (21 in. filters) and S8M150, S8M500 (25 in. filters). The large and small cartridges and the inner/outer cartridge pack are specific to each model; the tank halves and cord ring depend on the 21 in. or 25 in. tank; the valve and gauge assembly, bulkhead parts, O-rings and clamps are shared.
The S7M120 uses 7 clamps and clamp bolts, the S8M150 uses 8.
Repair or replace?
Most of these parts are replaceable on their own, which is why it matters which one has actually failed before anything is ordered. Whether a repair or a new pump makes more sense depends on what failed and the condition of the rest of the pump. Pool Filter Repair & Installation · Pool Equipment Replacement & Upgrades
Already know which part you need? Many common repairs and installations have a set price, given before any work starts. Not sure what’s wrong? The Pool Problem Finder starts from what your equipment is doing.
Set prices for common jobs
- Filter installation$225 labor
- Filter cleaning$140 labor
Labor prices don’t include the pump, filter or parts, which are quoted with the job. You hear the full price before any work starts.
Source
Part numbers and reference numbers: Pentair, Pool Filter Replacement Parts Catalog, accessed 2026-10-22. Pentair and System 3 modular media (SM series) are trademarks of their owner and are used here only to identify the equipment. Mobile Pool Repair is not affiliated with or endorsed by Pentair.
Pentair System 3 modular media (SM series) trouble?
Pool Filter Repair & Installation at your equipment pad in Queen Creek, Gilbert and Chandler and across the East Valley. Call, or text a photo of the label and the pad.