About Pool Filter Lab

Pool Filter Lab is an independent reference for identifying pool and spa filter cartridges. It connects part numbers across manufacturer catalogs and lets a pool owner check the dimensions, end caps and equipment fitment behind a cross-reference.

Why it exists

Cartridge information is often published in long PDF catalogs, cross-reference charts and equipment tables. A search result may reveal a part number without showing why it maps to another number or whether the source dimensions agree.

Pool Filter Lab makes those relationships searchable while keeping the underlying uncertainty visible. A cartridge page shows aliases, physical specifications, fitment records, source tiers and conflict flags. The methodology explains how those fields are built.

What it is

Pool Filter Lab is:

• A structured index of supplied manufacturer catalog data
• A way to move from a printed number to possible equivalents
• A size-based aid when the number on a wet cartridge is unreadable
• A record of source disagreements that deserve a closer fit check

The site is written for the moment when the old cartridge is out of the tank and still available to measure.

What it is not

Pool Filter Lab is not a store, manufacturer, testing laboratory or installer. It does not certify performance, guarantee fit or replace the equipment maker’s service and safety instructions.

Pool Filter Lab is not affiliated with Unicel, Pleatco, Filbur, OnCore or any equipment manufacturer. Brand names, model names and part numbers are used nominatively to identify products and describe catalog cross-references.

How to use the site

Search the complete printed number first. Then compare the candidate page with the old cartridge and housing. If the number is missing, follow the measurement guide and use the size finder.

Read conflict flags rather than skipping them. A cross-reference narrows the search; the physical dimensions, end caps and confirmed equipment model finish the check.

Questions about financial relationships are covered in the disclosure. Suspected data errors belong in corrections.