





The Fleck 2510 AiQ Backwashing Carbon Filter pairs the Pentair Fleck 2510 valve and new AiQ controller with your choice of five premium catalytic or coconut shell carbons. Choose coconut shell carbon for chlorine, taste and odor, or catalytic carbon for chloramine and hydrogen sulfide. It replaces the discontinued Fleck 2510 SXT carbon filter.
Unlike cartridge filters, it cleans itself. The AiQ valve lifts and rinses the carbon bed on schedule, which keeps flow high and gets the full life out of the media.
Warranty: 5 years on the Fleck 2510 AiQ valve head and 10 years on the tank. See the full Fleck 2510 AiQ spec sheet (PDF).
| Carbon | Type | Base | Best For | Buy Media Only |
| Calgon OLC 12x30 | Standard | Coconut Shell | Chlorine, taste, odor, general organics | Calgon Coconut Shell Carbon |
| Jacobi AquaSorb CS 12x40 | Standard | Coconut Shell | Chlorine, THMs, low molecular weight organics | Jacobi Coconut Shell Carbon |
| Calgon Centaur-C 12x40 | Catalytic | Coconut Shell | Chloramine, hydrogen sulfide | Centaur Coconut Shell Carbon |
| Calgon Centaur 12x40 | Catalytic | Bituminous Coal | Chloramine, hydrogen sulfide | Centaur Catalytic Carbon |
| Jacobi AquaSorb CX-MCA 12x40 | Catalytic | Coconut Shell | Chloramine, hydrogen sulfide, THMs | Jacobi Catalytic Carbon |
Rule of thumb: on city water treated with chlorine, a standard coconut shell carbon is enough. If your city uses chloramine, or your well has a sulfur smell, choose a catalytic carbon.
Pair it with a Fleck 2510 AiQ Water Softener for soft, dechlorinated water throughout the house. Prefer a Clack valve? See our backwashing carbon filter for whole house.
| Valve | Fleck 2510 with AiQ Controller and Powerhead |
| Valve Material | Fiber-Reinforced Polymer |
| Inlet/Outlet | 3/4" Stainless Steel Bypass |
| Regeneration | Downflow Service, Backwash and Rinse |
| Regeneration Trigger | Time Clock |
| Cycle Times | Adjustable, 0–240 min per cycle |
| Max Valve Backwash | 17 GPM (25 psi drop) |
| Drain Line | 1/2" OD Clear Poly Tube |
| Working Pressure | 20–125 psi |
| Water Temperature | 34–110°F |
| Electrical | 110V, 50/60 Hz (24/220V available) |
| Enclosure Rating | NEMA 3R / IP54 |
| Programming | On-Board or USB-C |
| Warranty | 5 Years on Valve Head, 10 Years on Tank |
| Tank | Media | Service Flow | Backwash |
| 10" x 44" | 1 cu. ft. | 2 GPM | 5 GPM |
| 10" x 54" | 1.5 cu. ft. | 2 GPM | 5 GPM |
| 12" x 48" | 2 cu. ft. | 3 GPM | 7 GPM |
| 13" x 54" | 2.5 cu. ft. | 3.5 GPM | 10 GPM |
| Carbon | Mesh | Iodine Number (min) | Certification |
| Calgon OLC | 12x30 | 900 mg/g | NSF/ANSI 61 |
| Jacobi AquaSorb CS | 12x40 | 1,000 mg/g | NSF 61, AWWA B604 |
| Calgon Centaur-C | 12x40 | 900 mg/g | AWWA B604, FCC |
| Calgon Centaur | 12x40 | 825 mg/g | AWWA B604, FCC |
| Jacobi AquaSorb CX-MCA | 12x40 | 1,000 mg/g | NSF 61 & 42, AWWA B604 |
With coconut shell carbon it removes chlorine, taste, odor, color and organic chemicals such as THMs. With catalytic carbon it also removes chloramine and hydrogen sulfide.
Catalytic carbon is activated carbon with an enhanced surface that breaks down chloramine and hydrogen sulfide, which standard carbon handles poorly. Choose it if your city uses chloramine, or if your water has a rotten egg smell.
Coconut shell carbon is harder and has a higher iodine number (900–1,000 mg/g), so it adsorbs well and holds up to backwashing. Centaur's coal-based catalytic carbon is the original chloramine carbon and a proven choice for chloramine and sulfur.
A backwashing filter cleans its own bed, keeps full household flow and only needs new carbon every few years. There are no cartridges to buy or swap.
It depends on water use and chlorine levels. Most homes rebed every 3–5 years. Each carbon is also sold on its own for rebedding.
Carbon doesn't remove hardness. For hard water, pair it with a Fleck 2510 AiQ Water Softener.
Yes. Pentair has discontinued the 2510 SXT. The 2510 AiQ replaces it, with a full-color display, USB-C programming and a modular powerhead.
5 years on the Fleck 2510 AiQ valve head and 10 years on the tank.
At Aqua Home Supply, we take pride in delivering your water treatment systems safely and efficiently.
Fast, secure, and worry-free—your new water system arrives job-ready.