Start with the printed cartridge number and the housing or system model. Similar length, diameter, micron wording, or end-cap appearance does not prove a replacement is interchangeable.
Identification checklist
- Record the complete cartridge label, including prefixes, suffixes and stated pack quantity.
- Record the documented housing or system model before comparing a cartridge.
- Use only dimensions, configuration and micron information stated by the manufacturer or source record.
- Confirm whether the listed offer is a single, case, or other stated selling unit.
Example part identifiers
These examples identify documented parts, not universal fitment.
- PP-BB-10-1 — Harmsco PP-BB-10-1 PolyPleat Water Filter (1 Micron Absolute) - Case of 8
- PP-BB-20-1 — Harmsco PP-BB-20-1 PolyPleat Water Filter (1 Micron Absolute) - Case of 4
- PP-BB-20-1 — Harmsco PP-BB-20-1 PolyPleat Water Filter (1 Micron Absolute)
Related parts and help
Browse filter cartridges · Part references · Ask for fitment help
Sources reviewed
Review date: 2026-10-02. October 2026 supplier assortment records; Pentair Pentek S1 cartridge specification sheet. Manufacturer documentation controls technical claims and fitment.