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Compatible Replacement for Purex 07-0654. Cross-References Pleatco ULTRA-A11, Unicel C-7656 and Filbur FC-1245.
SKU XLS-731 4PACK · UPC 810625026022
Confirm your fit
The XLS-731 4-pack is a replacement cartridge set for the Pentair Purex CF-50 and Purex CF-50/150. It replaces Purex 07-0654, along with aftermarket Pleatco ULTRA-A11 / PA55, Unicel C-7656 / C-7455 and Filbur FC-1245 / FC-1240. The same cartridge fits the other filters listed under Compatibility.
Each cartridge is 7" in diameter and 19 5/8" long with a 3" open end cap top and bottom, and carries 55 sq ft of filter media, 220 sq ft across the 4 cartridges in this pack.
We make every cartridge in Austin, Texas, and shipping is free.
Measure your old cartridge cap to cap, then across the widest pleat.
How to measure a cartridge →Measuring your old cartridge
A variance of ⅛" is normal. Anything larger usually means a different housing model — check the number printed on your old cartridge against the compatible parts list before ordering.
Match your filter housing below, click any part number to verify the fit, or paste your existing part number into the search box.
Filter housings and systems this cartridge fits
OEM and competitor cartridge part numbers this product replaces
The Perfect Fit Guarantee applies to the cross-references listed here. Brand names, models and part numbers identify compatibility only. If your housing is not listed, reach out to our team before ordering.
Can't find your part number? Look it up on the full pool filter cartridge cross-reference chart.
Still unsure after reading these? Send us the number stamped on your old cartridge and we will confirm the fit.
It fits the Pentair Purex CF-50 and Purex CF-50/150. The same cartridge also fits the other filters listed under Compatibility. Check the model on your filter tank before you order.
The Excel Filters XLS-731 replaces Purex 07-0654. Aftermarket equivalents: Pleatco ULTRA-A11, Unicel C-7656 and Filbur FC-1245.
7" diameter, 19 5/8" long, 55 ft² of media (end caps — top: 3" Open End, bottom: 3" Open End). Matching measurements alone do not prove a fit: some of our cartridges share a size and differ in filtration area or end caps, so check the part number on your old cartridge too.
No. The XLS-731 is an independently manufactured replacement cartridge, made in the USA by Excel Filters and built to match the Purex 07-0654 specification. Purex is a trademark of its owner, used only to show compatibility.
Most pool and spa cartridges last 1–2 seasons with regular rinsing. Replace it when cleaning no longer restores flow, the pleats fray, or the end caps crack.
XLS-772 • 4-Pack
In stockReplaces: Pentair R173205, Pleatco PA75, Unicel C-7475, Filbur FC-0635
XLS-777 • 4-Pack
In stockReplaces: Hayward CX1260RE, Pleatco PA126, Unicel C-7495, Filbur FC-1296
*Perfect Fit Guarantee applies to the OEM and aftermarket cross-references listed on this page; brand names, models and part numbers identify compatibility only. We ship to the 48 contiguous United States only; free standard shipping applies to those orders with no order minimum, and expedited service is priced at checkout. Every cartridge carries a 6-month limited warranty against defects in materials and manufacturing, separate from our 30-day return policy.
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