💧 Cartridge, 4-3/16″ ot, 4-3/16″ob, 5-5/8″dia,18-3/4″L,Inner
Made by Darlly Filtration, manufacturer part number PP1644. If your old part carries one of the cross-reference numbers further down, this is listed as its alternative.
📏 Specifications
| Specification | Value |
|---|---|
| Brand | Darlly Filtration |
| Manufacturer part number | PP1644 |
| Top | 4-3/16″ open |
| Bottom | 4-3/16″ open |
| Diameter | 5-5/8″ |
| Length | 18-3/4″ |
| Catalog description | Cartridge, 4-3/16″ ot, 4-3/16″ob, 5-5/8″dia,18-3/4″L,Inner |
🔄 Cross-reference part numbers
These part numbers are listed as alternatives for this part.
| Brand | Part number |
|---|---|
| Filbur | FC-2769 |
| RJ Filtration | AK-6473164 |
📐 How to check the size
Measure your old cartridge from end to end for the length, and across the pleats at the widest point for the diameter. Then check the hole in the center of each end cap: an open end has a hole straight through, a closed end is solid. All of these should match the specifications table above.



