Pentair R173578 Clean & Clear Plus Replacement Cartridge — 130 sq. ft., 7" x 32" (CCP520) — Genuine OEM
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The Pentair R173578 Filter Cartridge is the genuine OEM 130 sq. ft. replacement element for the Clean & Clear Plus 520 (CCP520) cartridge filter. Sold individually — note that the CCP520 takes four cartridges to make up its rated filtration area.
Key Features
- Genuine Pentair OEM: Correct pleat count, end-cap geometry and media weight for the CCP520 body.
- 130 sq. ft. of media: The largest element in the Clean & Clear Plus range.
- 4 oz. media: Captures fine debris while maintaining flow and keeping operating pressure down.
- Open 3" ends: Both top and bottom open with 3" inside diameter, as the CCP520 manifold requires.
- Rinsable and reusable: Cleans up with a hose and periodic deep soaking.
Specifications
- Part Number: R173578
- Sold As: Single cartridge — four required per filter
- Filter Area: 130 sq. ft.
- Dimensions: 7" outside diameter x 32-1/16" length
- End Style: Open top and bottom, 3" inside diameter
- Media: 4 oz.
- Fits: Pentair Clean & Clear Plus 520 (CCP520), manufactured after 11/98
- Cross-reference: 178585, RAI-051-3578, Pleatco PCC130, Unicel C-7472, Filbur FC-1978
- UPC: 788379502195
- Brand: Pentair (Genuine OEM)
Frequently Asked Questions
How many do I need?
Four. The CCP520 holds four cartridges. This listing is for one — order four to replace a full set.
Will this fit the CCP420?
No. The CCP420 uses the shorter 105 sq. ft. element (26-1/16"). This one is 32-1/16" long. Check the model on your filter label before ordering.
Does my filter pre-date November 1998?
Filters made before 11/98 use a different cartridge — typically the Unicel C-7498. Check the date stamp on the tank if you are unsure.
Should I replace all four at once?
Yes. Mixing new and worn elements causes uneven loading and shortens the life of the new cartridges.
How long does it last?
Typically two to three seasons with regular rinsing and periodic deep cleaning, though this varies with bather load and water chemistry.
Frequently asked questions
How often should a filter cartridge be replaced?
Most cartridges are cleaned several times a season and replaced when the pleats no longer come clean, the fabric goes hard or brittle, or the end caps separate. Filter pressure that returns to high shortly after a cleaning is the usual sign that the element is finished.
What is the part number for this filter cartridge?
Pentair lists this filter cartridge under part number 17378. Quote 17378 when you cross-reference against your equipment manual, an existing part, or a parts diagram, so you are comparing the same revision.
How do I clean this cartridge?
Rinse between the pleats with a garden hose, working top to bottom, and soak in a dedicated filter cleaner to remove oils and scale. Avoid a pressure washer, which drives debris deeper into the fabric and cuts the pleats.
How do I confirm this fits my equipment?
Match the part number stamped on the component you are replacing, or look it up in the parts list for your Pentair equipment. If your model or serial number is not named on this page, send it to us before you order and we will confirm the fit.
Will this cartridge fit my filter housing?
Cartridges are matched by outside diameter, length, end-cap style and square footage, all of which are listed in the specification section. Compare those four dimensions against your existing element - the filter's brand name on its own is not enough to confirm a fit.
Is there a warranty on this filter cartridge?
It carries the standard Pentair manufacturer warranty. The terms are set by Pentair, and on some equipment the coverage only applies when a licensed professional performs the installation. Keep the receipt and packaging until you have confirmed correct operation.