Cartridge before-and-after service record
Research-based decision aid · Allison Landzt, Editor · October 23, 2026
Full guide and manufacturer sources ·
Print one record per service event. No input fields; no data is sent or stored. Use portrait orientation and disable browser headers/footers.
Never open a pressurized filter. A zero gauge reading alone is not permission to open it. Use accessible records or a qualified professional's report. Do not operate unsafe equipment to complete this sheet. Not an opening, chemical-cleaning or restart procedure.
1. Match the equipment and evidence
| Record field | Evidence / answer / attached record |
|---|---|
| Tank full model / revision; element identifier | |
| Applicable equipment and element manual / revision / pages | |
| Service date / qualified provider / approved method reference | |
| Original NEW-element pressure / date / RPM / system conditions | |
| Gauge reliability / confirmed by whom | |
| BEFORE service: pressure / RPM / observed flow / date | |
| AFTER service: pressure / RPM / observed flow / date | |
| Comparable system conditions? Differences / debris or algae events | |
| Media / core / end-cap condition (safe inspection or report) | |
| Band-only observations, recorded separately | |
| Prior service dates / comparable intervals / changed conditions | |
| Exact-manual replacement criterion AND timing / professional assessment |
2. Diagnose before purchase
Decision: service review / system or gauge diagnosis / confirmed replacement / unresolved
Missing evidence / responsible provider / follow-up: __________________________________
If replacement supported: confirmed SKU / compatibility / quantity: _____________________
No universal pressure or age cutoff. A cleaning trigger is not automatically a replacement verdict. Compare readings at comparable RPM and system conditions; do not adjust equipment merely to fill this sheet. Keep the original new-element baseline distinct from an older element's after-cleaning reading. A single tank gauge is not a direct differential-pressure measurement.
Assess the whole element. Unicel says broken or missing bands alone need not require replacement, while describing loose bands as a possible wear indication. Record torn media, core and end-cap damage separately. One shortened service interval is not proof of expiry. New media does not repair unsafe equipment or certify swimming safety. Hold unresolved purchases.
Original editorial aid, not hands-on testing. Source context and exact-model qualifications: deckanddeep.com/pool-pumps/clean-or-replace-pool-filter-cartridge/ — Pentair Clean and Clear Plus 2025 guide; Hayward SwimClear ISC2031 REV B; Unicel Maintenance & FAQ. No product or affiliate links.