Filter bags are one of the most cross-shoppable products in industrial filtration: sizes are standardized across the industry, media designations are nearly universal, and Universal Filters manufactures functional equivalents to the bags sold under most major brands. Send us any part number — through the quote form or at 800-554-8555 — and we’ll cross it, usually the same business day.
Why Cross-Referencing Works: The Universal Size Standard
Whatever the brand on the box, bag sizes follow one industry standard. A size 2 bag from any manufacturer fits any size 2 housing:
| Industry size | Dimensions | Fits housings from |
|---|---|---|
| Size #1 | 7″ × 16.5″ | Eaton, Pall/FSI, Rosedale, Strainrite, Parker, Hayward, and others |
| Size #2 | 7″ × 32″ | |
| Size #3 | 4″ × 8″ | |
| Size #4 | 4″ × 14″ |
Larger sizes (through 8.5″ × 32″) follow the same logic. The main compatibility variable is the top style — steel ring, plastic snap-seal flange, Parker-style C-band, or Cuno-style 9″ ring — and we build all of them.
Media Codes Translate Directly
| Code you’ll see | What it is | Universal Filters equivalent |
|---|---|---|
| PE / PES | Polyester felt | PE felt bags, 1–200 µm |
| PO / PP / POG | Polypropylene felt (glazed = G) | PO/PG felt bags, 1–200 µm |
| NMO | Nylon monofilament mesh | NMO mesh bags, 35–800 µm |
| PEMU / PEM | Polyester multifilament mesh | PEMU mesh bags |
| Welded / seamless | Ultrasonically welded construction | Welded bags |
| Oil sorbent / oil absorbing | Hydrocarbon-removal bags | Oil Magnet® bags |
Brand Guides & Part Number Decoders
Each guide below includes a full part-number decoder — the code tables to read a competitor’s bag label field by field — plus worked examples and honest fit notes:
- Eaton filter bag cross reference & part number decoder (incl. Hayflow, Duragaf, Sentinel lines)
- Pall / FSI part number decoder (BPONG, BPENG, POMF, BOS & more)
- Rosedale part number decoder (PE-25-P2S, RPO tops, sizes 7/8/9/12)
- Strainrite part number decoder (SP/AP codes, Sure-Weld, SPMF/HPM lines)
- Parker part number decoder (Fulflo C/G styles, Quik-Seal & flex band tops)
- Cuno / 3M part number decoder (NB Series, 9″ Cuno-style PC bags)
- Bags for Hayward housings
Reading one of our part numbers? See the Universal Filters part number decoder.
How to Get a Cross-Quote
- Find the part number on your current bag, its box, or your last invoice.
- Send it via the quote form (a photo of the bag’s tag works too).
- We confirm the spec — size, media, micron, top style — and quote our equivalent.
All brand names are trademarks of their respective owners. Universal Filters is not affiliated with or endorsed by these companies; we manufacture compatible replacement filter bags to equivalent specifications.