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4-Pack Excel Filters XLS-731 replacement filter cartridges for Hayward EasyClear C550
An Excel Filters pleated replacement pool filter cartridge standing upright against a black background
4-Pack Excel Filters XLS-731 replacement filter cartridges for Hayward EasyClear C550 — view 2
Excel Filters sizing chart for Hayward housings Super StarClear 3000, SwimClear C3020/C3025/C3030, StarClear C500 and EasyClear C550, comparing XLS-709, XLS-710 and XLS-731 by square footage, height and alternate part numbers
Cutaway diagram of an Excel Filters cartridge labelling its Cleanguard ultra-efficient media, optimal-flow engineered core, secure fit banding and durable end caps
Six-step illustrated guide to cleaning a pool filter cartridge: switch off the pump and release pressure, remove the cartridge, rinse it with a garden hose, flip it over and repeat, refit it in the housing, then enjoy the pool
A child floating with a kickboard in a clean swimming pool, above the line "Excel Filters replacement cartridges clean your pool and spa"
A golden retriever swimming underwater in a clear blue pool, above the line "Cleaner, clearer water. That’s how we Excel."
4-Pack 01 / 08
Hayward CompatiblePool and Spa Filter

Excel Filters XLS-731 Replacement Filter Cartridges for Hayward EasyClear C550 — 4-Pack

Compatible Replacement for Hayward CX550RE. Cross-References Pleatco PA55, Unicel C-7455 and Filbur FC-1245.

Made in the USA by Excel Filters

SKU XLS-731 4PACK · UPC 810625026022

$169.99 4 Cartridges Included
Free shipping. Tax calculated at checkout.
In stock 35 packs ready to ship from Austin

30-day returns.

  • Perfect Fit Guarantee*On listed part numbers
  • Free Standard Shipping*Every order, no minimum.
  • 6-Month Warranty*Covers manufacturing defects

Confirm your fit

  • Your housing — Hayward EasyClear C550.
  • Your old part number — CX550RE, PA55, C-7455, FC-1245, Muskin 58039. See all 11 compatible parts →
  • Your measurement — 7" diameter, 19 5/8" height, 3" Open End caps top and bottom.

Overview

Built to OEM Spec, Engineered to Clean®

Built to OEM dimensions for Hayward EasyClear C500 / C550 and CX550RE cartridge filter systems, this replacement matches the original cartridge geometry, end-cap style, and media surface area — without the OEM markup. It directly replaces aftermarket Pleatco PA55, Unicel C-7455, and Filbur FC-1245 part numbers — the full cross-reference list is in the Compatibility tab. Every cartridge is manufactured in our Austin, TX facility, ships free, and is backed by the Excel Filters Perfect Fit Guarantee on its listed cross-references.

The XLS-731 4-pack replacement cartridges are engineered for Hayward and built for dependable day-to-day filtration performance. Each cartridge is sized at 7" diameter x 19 5/8" length, with Open End top and Open End bottom end caps for direct-fit installation with no housing modifications.

Specifications

Measure once. Order with confidence.

Measure your old cartridge cap to cap, then across the widest pleat.

How to measure a cartridge →
Outer diameter
7"
Overall length
19 5/8"
Top end cap
3" Open End
Bottom end cap
3" Open End
Media per cartridge
55 ft²
Total media, 4-pack
220 ft²

Measuring your old cartridge

  • Length — cap to cap, with both end caps included.
  • Diameter — across the widest point of the pleats, not the end cap.
  • End caps — whether each end is open or closed, and the size of any opening.

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.

Cross-reference

Check compatibility by system or part number

Match your filter housing below, click any part number to verify the fit, or paste your existing part number into the search box.

Fits These Systems

Filter housings and systems this cartridge fits

Hayward® Housings
Hayward EasyClear C550

Replaces These Part Numbers

OEM and competitor cartridge part numbers this product replaces

Hayward®
Pleatco
Unicel
Filbur
Other Part #s This 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.

Reviews

What pool pros and homeowners are saying

Need help fitting?

Not sure if this fits your housing?

Enter your current cartridge's part number, your housing model, or a competitor number — we'll check it against this filter and the full catalog.

Questions

Fit, replacement & ordering

Still unsure after reading these? Send us the number stamped on your old cartridge and we will confirm the fit.

How do I confirm this cartridge fits my system?

Match the part number printed on your current cartridge against the Compatibility list on this page, or measure the outer diameter, length, and end-cap style and compare them with the Specifications tab. A variance of about 1/8 inch is normal — anything larger usually means a different housing model.

Which part numbers does this cartridge replace?

It directly replaces CX550RE, PA55, C-7455, FC-1245, Muskin 58039, Aladdin 15503, Baleen AK-6036, Pure N Clean PC-1245, Tier1 PAS-1064, Spa-Daddy SD-00097. This covers the OEM, Pleatco, Unicel, and Filbur cross-references listed in the Compatibility section on this page.

Which filter systems does this cartridge fit?

It fits Hayward EasyClear C550 when dimensions match. Always confirm against your housing model before ordering.

Is this a genuine Hayward part?

No — it is an aftermarket replacement cartridge manufactured by Excel Filters in Austin, TX and built to OEM dimensions and media specs. It is not affiliated with or endorsed by the original equipment manufacturer.

How often should I replace my filter cartridge?

Most pool and spa cartridges last one to two seasons depending on bather load and water chemistry. Rinse the cartridge monthly during heavy use and replace it when cleaning no longer restores flow or the pleats show wear.

What if it does not fit my housing?

First double-check the part number on your old cartridge against the Compatibility list on this page — most fit problems trace back to ordering for a different housing model than the listing covers. If you still have a fit question, contact us at (888) 532-2801 and our team will help you confirm the right cartridge before or after you order; returns are handled under our standard return policy.

Other sizes in this family

If your housing is a different model

All Pool and Spa Filters →
Back to all filters

*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.