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Compatible Replacement for Waterway 817-0081. Cross-References Pleatco PCC80, Unicel C-7470 and Filbur FC-1976.
SKU XLS-720 4PACK · UPC 810625025919
Confirm your fit
Also fits: Pentair Clean & Clear Plus 320 →
The XLS-720 4-pack is a full replacement set for the Waterway Crystal Water 325. That filter takes four cartridges, and this pack includes all four. It replaces Waterway 817-0081, along with aftermarket Pleatco PCC80, Unicel C-7470 and Filbur FC-1976.
Each cartridge is 7" in diameter and 20" long with a 3" open end cap top and bottom, and carries 82 sq ft of filter media, 328 sq ft across the 4 cartridges in this pack. Crystal Water cartridges share that diameter and end cap, so length is the quick check: the 425 uses a 26 1/16" cartridge and the 525 a 32 1/16" cartridge.
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.
The Excel Filters XLS-720 replaces Waterway 817-0081. Aftermarket equivalents: Pleatco PCC80, Unicel C-7470 and Filbur FC-1976.
Four. The XLS-720 4-pack is one full set for the filter.
By length. The 325 cartridge is 20" long, the 425 is 26 1/16" and the 525 is 32 1/16". All three are 7" in diameter with 3" open ends.
7" diameter, 20" long, 82 sq ft of filter media. Both end caps: 3" Open End. Measure your old cartridge before ordering if you are unsure of the part number.
No. The XLS-720 is an independently manufactured replacement cartridge, made in the USA by Excel Filters and built to match the Waterway 817-0081 specification. Waterway 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-718 • 4-Pack
In stockReplaces: Waterway 817-0106, Pleatco PCC105, Unicel C-7471, Filbur FC-1977
XLS-706 • 4-Pack
In stockReplaces: Waterway 817-0143, Pleatco PCC130, Unicel C-7472, Filbur FC-1978
*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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