Part reference
Pentair R173578
The Pentair R173578 is a replacement pool filter cartridge for the Clean & Clear Plus 520 filter system.
R173578 is the Pentair part number for the single cartridge that fits the Clean & Clear Plus 520. It replaces the older Pac Fab number 178585. The complete factory set of four is catalogued as 179136, but each cartridge inside is an R173578. The cartridge is 32 1/16 inches long with 130 square feet of media.
Specifications
| Length | 32 1/16 in |
|---|---|
| Outer diameter | 7 in |
| Top opening | 3 in |
| Bottom opening | 3 in |
| Filtration area | 130 sq ft |
| System total | 520 sq ft (four cartridges) |
| Media | 4 oz polyester |
How to verify this is the right cartridge
If R173578 is printed on your cartridge end cap or listed on the filter label, this is the correct part. It is an OEM Pentair number, so the match is definitive.
If you cannot read the cap, measure: 32 1/16 inches long, 7 inches in outer diameter, 3 inch openings top and bottom. Those confirm the 520 size regardless of any number.
R173578 and 178585 frequently appear together on the same label. That is expected. R173578 is the current Pentair number and 178585 is the older Pac Fab number for the same single cartridge. The full set of four is Pentair 179136.
Cross-reference
R173578 is the same cartridge as the numbers below. Any of these fits the Clean & Clear Plus 520:
| Brand | Part number |
|---|---|
| Unicel | C-7472 |
| Pleatco | PCC130 |
| Filbur | FC-1978 |
| Pentair OEM (set of 4) | 179136 |
| Pentair OEM (single) | R173578 |
| Pentair / Pac Fab (single) | 178585 |
| Pentair housing | 160332 |
| Aladdin | 22505 |
| Waterway | 817-0131 |
| Baleen | AK-30434 |
| Pleatco (4-pack) | PCC130-PAK4 |
| Filbur (4-pack) | FC-6475 |
Meridian Filtration launches the Clean & Clear Plus 320, 420, and 520 cartridges soon. Enter your email and we'll send one message when the R173578 is in stock.