Pentair Replacement Cartridge for CCP520 Filter | R173578
Pentair
SKU: R173578
Pentair Clean & Clear Plus 520 Replacement Filter Cartridge Element (130 Sq Ft) | R173578
The Pentair R173578 is an OEM replacement cartridge element for the Pentair Clean & Clear Plus 520 cartridge filter (often labeled CCP520). Each R173578 cartridge provides approximately 130 sq ft of filtration area, and a complete CCP520 set uses four cartridges (totaling 520 sq ft). Replacing worn or clogged cartridges helps restore flow, reduce pressure, and improve overall water clarity.
Compatibility
- Fits: Pentair Clean & Clear Plus 520 cartridge filters (CCP520)
- System requirement: 4 cartridges required for a full replacement set (520 sq ft total)
- Note: Commonly specified for Clean & Clear Plus 520 units manufactured after approximately 11/1998
Key Features
- OEM Pentair cartridge element designed for proper fit and sealing in CCP520 filters
- High surface area (about 130 sq ft per cartridge) to capture fine debris
- Helps restore performance when pressure rises or circulation weakens
- Service-friendly for rinse cleaning and periodic deep cleaning
Specifications
- Brand: Pentair
- Part Number: R173578
- Filter Type: Cartridge element (single)
- Filtration Area: 130 sq ft (per cartridge)
- Used In: 520 sq ft system (4 cartridges total)
- Approx. Dimensions: 7" diameter x 32-1/16" length
- Center Hole: 3" (open both ends, typical CCP520 style)
- UPC: 788379502195
- Quantity: Sold individually
When to Replace
- Filter pressure rises quickly after cleaning (media is worn or permanently loaded)
- Visible tears, loose end caps, cracked bands, or deformed pleats
- Pleats won’t rinse clean or remain gray/oily after deep cleaning
- Cloudy water persists despite correct chemistry and run time
Installation Notes
- Shut off the pump and relieve pressure at the air-relief valve before opening the filter.
- Remove and replace cartridges one-by-one to keep orientation consistent.
- Inspect and clean the manifold and tank interior; debris left behind can re-clog new cartridges.
- Confirm cartridges seat fully on the bottom manifold and align properly with the top manifold.
- After reassembly, open the air relief and restart the pump until all air is purged, then close the relief.
Related Products
- Search Aqua Pool Supply for R173578
- Clean & Clear Plus 520 parts
- Cartridge filter cleaners
- Filter O-rings and seals
Maintenance Tips
- Rinse cartridges from top to bottom with a high-pressure nozzle to flush debris out of the pleats.
- For oils/lotions, soak in a cartridge cleaner (or mild degreaser solution) before final rinsing.
- Rotate between two cartridge sets when possible to reduce downtime and extend service life.
- Record “clean” filter pressure after installation—use it as your baseline for future cleanings.
Questions about returns? View our return policy.
Hours Of Operation:
Monday - Friday: 7:00 am to 5:00 pm Phoenix Time
Saturday: 8:00 am to 2:00 pm
Sunday: Closed
- We do not ship on Saturday or Sunday.
- Orders totaling more than $300 will require signature confirmation upon delivery.
- We process and prepare orders for shipment within 1 business day. Please note that many other pool supply retailers require 3–5 days of handling time before shipping.
- Orders placed after 1:00 pm Phoenix Time may not be eligible for same-day shipment.
- Expedited shipping options are available at checkout.
Return Policy:
- Products that are received damaged will receive a refund in store credit.
- Most products are eligible for return within 30 days of receipt, except where noted below.
- To initiate a return, please complete an RMA form prior to sending your item back.
- Original shipping costs are non-refundable and will be deducted from the return credit.
- Items returned missing accessories or original packaging, or that are not in the same condition as received, may be subject to a restocking fee of up to 100% depending on the condition of the item upon return.
- Some returns will be charged an automatic 15% restocking fee.
- We are unable to issue refunds for items that have been damaged or rendered inoperable due to installer error.
- Please complete the return form to receive your RMA number and return shipping label.
- Chemical products are not eligible for return under any circumstances.
- The Pentair Colorsync 618031 is not eligible for return.
- Pool cleaners are not eligible for return.
- Opened seals and o-rings are not eligible for return.
- Capacitors are not eligible for return.
- Plastic popup tools are not eligible for return.
- Automation components and circuit boards are not eligible for return.
- If a light is returned due to a reported malfunction and is found to be fully operational upon testing, return shipping costs and a restocking fee will be deducted from the refund.
- Orders refused at the time of delivery will be subject to the original shipping costs being deducted from the refund.
Related Products
