PIN20 / C-5315 / FC-3752
15 sq ft replacement filter cartridge • 5.75″ OD × 10″ long
The PIN20 replaces the Intex 'Type B' filter used in the medium-size Intex above-ground pool pumps. It's a 15-square-foot pleated cartridge, 5-3/4 inches across and 10 inches tall, with a 1-7/8-inch center opening. Intex numbers it 59905, and the pleated cross-references are Unicel C-5315 and Filbur FC-3752. Like all Intex filters, the sizing is proprietary. Type A, Type B, and Type D don't interchange, and they don't map to standard pool cartridges, so match the label on your pump or the old cartridge. If yours reads Type B, this is the one, and a pleated version will run longer between rinses than the flimsy factory paper element.
Compare on Amazon
PIN20 replacements on Amazon
The buttons below pull up Amazon results for each cross-reference part number. Same physical cartridge, different stickers, often different prices. Cross-shop and pick the cheapest option that has solid recent reviews.
Cross-Reference & Interchangeable Part Numbers
| Brand | Part Number | Type |
|---|---|---|
| Pleatco | PIN20 | Primary |
| Unicel | C-5315 | Equivalent |
| Filbur | FC-3752 | Equivalent |
| OEM | Intex 59905 | Original Equipment |
| OEM | Intex Type B | Original Equipment |
Always verify dimensions and end-cap type before purchasing a replacement.
Compatible Pool Filter Systems
| Brand | Model |
|---|---|
| Intex | Type B |
Frequently Asked Questions
What are the dimensions of the PIN20?
The PIN20 is 5.75 inches in outer diameter, 10 inches long, with an open top and an open bottom. Total filtration area is 15 square feet. Before ordering, pull your existing cartridge and measure it yourself, or check the label inside the housing. OD and length both have to match within about an eighth of an inch, and the end-cap style needs to match exactly so the cartridge seats properly when the lid closes.
What other part numbers are interchangeable with the PIN20?
PIN20 is the same physical cartridge as C-5315, FC-3752, plus OEM versions like Intex 59905, Intex Type B. Same dimensions (5.75" × 10"), same open top, same open bottom. The Pleatco, Unicel, and Filbur boxes ship the same media inside, just with different stickers. The only thing to watch is the end-cap style: if a cross-reference has a slightly different cap design, it may not seat right in your housing.
Is the Intex 59905 the same filter as the PIN20?
Yes. Intex 59905 is an OEM number, the code the tub or pool builder stamps on the cartridge they ship. The filter itself is made by Pleatco, Unicel, or Filbur, so Intex 59905 (along with Intex Type B) and PIN20, C-5315, FC-3752 all point to one interchangeable cartridge. Buy whichever is cheapest with solid recent reviews, and just check that the dimensions match your old cartridge before you order.
How often should I replace the PIN20?
At 15 sq ft the PIN20 runs smaller than the big 100-plus sq ft pool cartridges, so it has less buffer between cleanings. Expect 12 to 18 months in normal use, less if the pool sees heavy traffic or the chemistry drifts. Watch the gauge: when pressure sits 8 to 10 psi above the clean starting point and a soak won't drop it, put in a fresh one.
How do I clean the PIN20?
The PIN20 has open ends on both top and bottom, so water flows straight through. Pull the cartridge from the housing and hose it down. Hit the pleats from above at about a 45-degree angle so water rinses debris out instead of packing it deeper, and work top to bottom while rotating the cartridge. Skip the pressure washer. The high pressure tears or collapses pleats, and once that happens you've lost media that doesn't come back. Every few months, give it a deeper clean: soak in a dedicated pool filter cleaner per the product's dwell time, then rinse it down completely before reinstalling. Keeping a spare cartridge on the shelf is genuinely worth it. You swap, run the soak overnight, and the pool keeps filtering.
Which hot tubs and spas use the PIN20?
Pull your existing cartridge and read the part number off the end cap, or check the label inside the filter compartment. That's the most reliable way to confirm compatibility.
Dimensions
Specifications
| Outer Diameter | 5.75″ |
|---|---|
| Length | 10″ |
| Top Type | Open (no end cap) |
| Bottom Type | Open (no end cap) |
| Filtration Area | 15 sq ft |
| Primary Brand | Pleatco |
| Part Number | PIN20 |
Fitment notes
1-7/8 inch inner diameter. Intex Type B filter, medium above-ground pool pumps.