CMP CompatiblePool and Spa Filter

CMP 35 Replacement Filter Cartridge, 1-Pack — Excel Filters XLS-418

Compatible Replacement for CMP 25393-000-000. Cross-References Pleatco ULTRA-S7, Unicel C-4335 and Filbur FC-2385.

Made in the USA by Excel Filters

SKU XLS-418 1PACK · UPC 810625020211

$29.99 Single Cartridge
Free shipping. Tax calculated at checkout.
In stock 73 cartridges 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 — CMP 35 using 25393-000-000, Pentair/Rainbow Dynamic Series IV DFM / DFML 35, Waterway 35.
  • Your old part number — CMP 25393-000-000, 17-2482, ULTRA-S7, C-4335, FC-2385. See all 32 compatible parts →
  • Your measurement — 4 15/16" diameter, 9 1/4" height, 2 1/8" Open End caps top and bottom.

Pick your brand: Pentair Rainbow Dynamic 35 →Waterway 35 Sq. Ft. →Sundance Tacoma 680 using 6000-136Other brands CMP 35 using 25393-000-000

Overview

Built to OEM Spec, Engineered to Clean®

The XLS-418 is a replacement cartridge for the CMP 35 using 25393-000-000. It replaces CMP 25393-000-000, along with aftermarket Pleatco ULTRA-S7 / PRB35-IN, Unicel C-4335 / C-4335RA and Filbur FC-2385 / FC-2385M. The same cartridge fits the other filters listed under Compatibility.

Each cartridge is 4 15/16" in diameter and 9 1/4" long with a 2 1/8" open end cap top and bottom, and carries 35 sq ft of filter media.

We make every cartridge in Austin, Texas, and shipping is free.

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
4 15/16"
Overall length
9 1/4"
Top end cap
2 1/8" Open End
Bottom end cap
2 1/8" Open End
Filtration area per cartridge
35 ft²
Total filtration area
35 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

Other Brands' Housings
CMP 35 using 25393-000-000
Pentair® Housings
Pentair/Rainbow Dynamic Series IV DFM / DFML 35
Waterway™ Housings
Waterway 35Waterway top-load/in-line 35 sq. ft. housing
Sundance® Housings
Sundance Tacoma 680 using 6000-136

Replaces These Part Numbers

OEM and competitor cartridge part numbers this product replaces

Other Part #s This Replaces
Pentair®
Waterway™
Sundance®
Harmsco®
Pleatco
Unicel
Filbur

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.

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.

Which CMP filters does the XLS-418 fit?

It fits the CMP 35 using 25393-000-000. The same cartridge also fits the other filters listed under Compatibility. Check the model on your filter tank before you order.

What CMP part numbers does the XLS-418 replace?

The Excel Filters XLS-418 replaces CMP 25393-000-000. Aftermarket equivalents: Pleatco ULTRA-S7, Unicel C-4335 and Filbur FC-2385.

What are the dimensions of the XLS-418 cartridge?

4 15/16" diameter, 9 1/4" long, 35 ft² of media (end caps — top: 2 1/8" Open End, bottom: 2 1/8" 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.

Is this a genuine CMP part?

No. The XLS-418 is an independently manufactured replacement cartridge, made in the USA by Excel Filters and built to match the CMP 25393-000-000 specification. CMP is a trademark of its owner, used only to show compatibility.

How often should the XLS-418 be replaced?

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.

*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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