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Compatible Replacement for Hayward CX550RE. Cross-References Pleatco PA55, Unicel C-7455 and Filbur FC-1245.
SKU XLS-731 1PACK · UPC 810625026374
Confirm your fit
The XLS-731 is a replacement cartridge for the Hayward EasyClear C550, Pentair Purex CF-50, American Commander 50 and Purex CF-50/150, plus 2 more filters listed under Compatibility. It replaces Hayward CX550RE / CX500RE, Pentair R173409 / R173203 and Purex 07-0654, along with aftermarket Pleatco ULTRA-A11 / PA55, Unicel C-7656 / C-7455 and Filbur FC-1245 / FC-1240.
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.
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.
Find the part number printed on your old cartridge in the Compatibility tab. If you cannot read it, measure the outside diameter and the length, check both end caps, and compare them with the Specifications tab. A difference of about 1/8 inch is normal; more than that usually means a different filter model. Matching measurements alone do not prove a fit: some of our cartridges share a size and differ in filtration area or end caps.
It replaces CX550RE, ULTRA-A11, C-7656, FC-1245, R173409, 07-0654, CX500RE and R173203. The Compatibility tab lists the rest.
It fits the Hayward EasyClear C550, Hayward Star-Clear C500, Pentair Purex CF-50 and American Commander 50. The Compatibility tab lists the others. Check the model on your filter tank before you order.
No. Excel Filters makes this cartridge in Austin, Texas. It is not made, sold or endorsed by Hayward; we use the name only to show which filters it fits.
Most pool and spa cartridges last one to two seasons, depending on how much the water is used and its chemistry. Rinse the cartridge monthly during heavy use, and replace it when cleaning no longer brings the flow back or the pleats show wear.
First check the part number on your old cartridge against the Compatibility tab: most fit problems come from ordering for a different filter model. If you still have a question, call us at (888) 532-2801 and we will help you find the right cartridge, before or after you order. Returns follow our standard return policy.
XLS-731 • 4-Pack
In stockReplaces: Hayward CX550RE, Pleatco PA55, Unicel C-7455, Filbur FC-1245
XLS-772 • 4-Pack
In stockReplaces: Pentair R173205, Pleatco PA75, Unicel C-7475, Filbur FC-0635
*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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