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15-Pack Excel Filters XLS-512 replacement filter cartridges for Waterway 75 sq. ft. top-load, Maax Spas and Leisure Bay S2/GS
15-Pack Excel Filters XLS-512 replacement filter cartridges for Waterway 75 sq. ft. top-load, Maax Spas and Leisure Bay S2/GS — view 2
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 golden retriever swimming underwater in a clear blue pool, above the line "Cleaner, clearer water. That’s how we Excel."
A child floating with a kickboard in a clean swimming pool, above the line "Excel Filters replacement cartridges clean your pool and spa"
15-Pack 01 / 06
Waterway™ CompatibleSpa Filter

Excel Filters XLS-512 Replacement Filter Cartridges for Waterway 75 Sq. Ft. Top-Load, Maax Spas and Leisure Bay S2/GS — 15-Pack

Compatible Replacement for Waterway 817-0015. Cross-References Pleatco PLBS75, Unicel C-5374 and Filbur FC-2971.

Made in the USA by Excel Filters

SKU XLS-512 15PACK · UPC 810625026565

$399.99 15 Cartridges Included
Free shipping. Tax calculated at checkout.
In stock 5 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 — Waterway/Waters Edge 75 sq. ft. top-load housing.
  • Your old part number — R173600, 817-0015, PLBS75, PLBS75-M, C-5374. See all 17 compatible parts →
  • Your measurement — 5 5/16" diameter, 14 13/16" height, 2 1/8" Open End caps top and bottom.

Overview

Built to OEM Spec, Engineered to Clean®

Built to OEM dimensions for Pentair R173600, Jandy Waterway 817-0015, and Waterway 817-0015 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 PLBS75, Unicel C-5374, and Filbur FC-2971 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-512 15-pack replacement cartridges are engineered for Waterway™ and built for dependable day-to-day filtration performance. Each cartridge is sized at 5 5/16" diameter x 14 13/16" 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
5 5/16"
Overall length
14 13/16"
Top end cap
2 1/8" Open End
Bottom end cap
2 1/8" Open End
Media per cartridge
75 ft²
Total media, 15-pack
75 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

Waterway™ Housings
Waterway/Waters Edge 75 sq. ft. top-load housing

Replaces These Part Numbers

OEM and competitor cartridge part numbers this product replaces

Pentair®
Waterway™
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 R173600, 817-0015, PLBS75, PLBS75-M, C-5374, C-5374RA, FC-2971, FC-2971M, Maax 107092, Rec Warehouse 303433, Aladdin 17540, Baleen AK-40081, Darlly 50651, Pure N Clean PC-2971, Spa-Daddy SD-00242, Spa-Daddy SD-00644. 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 Waterway/Waters Edge 75 sq. ft. top-load housing when dimensions match. Always confirm against your housing model before ordering.

Is this a genuine Waterway™ 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.