Fleck 2510 AIO 3 Cycle, Timer Clock Backwashing Filter Valve, No DLFC
Fleck 2510 AIO 3 Cycle Timer Backwashing Filter Valve
Four-Step Air Injection Oxidation Process
Air Pocket Formation
During backwash, the valve draws atmospheric air into the top of the filter tank, creating a compressed air pocket above the media bed that remains throughout the service cycle.
Contact and Precipitation
Incoming well water passes through the air pocket, where dissolved iron (Fe²⁺), manganese (Mn²⁺), and hydrogen sulfide (H₂S) are oxidized into insoluble particles that can be mechanically filtered.
Media Bed Capture
Oxidized contaminants are trapped by the filter media—typically Birm, Filox, Pro-OX, greensand, or catalytic carbon—as treated water exits through the distributor tube and into household plumbing.
Timed Regeneration and Air Recharge
At the scheduled time, the 12-day programmable timer initiates a timed backwash cycle that flushes captured contaminants to drain and replenishes the air pocket for the next service period.
Valve Details and Operating Parameters
| Valve Model | Fleck 2510 AIO (No DLFC) |
| Control Type | Timed backwash, 3-cycle electromechanical |
| Port Size | 1" FNPT inlet and outlet |
| Distributor Tube Size | 1.05" OD (standard) |
| Service Flow Rate | Up to 12 GPM continuous |
| Backwash Flow Rate | Up to 7 GPM |
| Operating Pressure | 20–100 PSI |
| Operating Temperature | 40°F – 110°F (4°C – 43°C) |
| Electrical Requirements | 120V AC / 60Hz (transformer included) |
| Timer Type | 12-day programmable LED clock |
| Tank Thread | 2.5" NPSM |
| Bypass Valve | 1" bypass included |
| Compatible Media | Birm, Filox, Pro-OX, greensand, catalytic carbon |
| Recommended Tank Sizes | 9"x48" to 12"x52" (based on flow and iron levels) |
| Manufacturer | Pentair (Fleck brand) |
Installation and Media Requirements
The Fleck 2510 AIO mounts directly to standard 2.5" NPSM threaded filter tanks using a 1.05" OD distributor tube. It pairs with oxidizing media including Birm, Filox-R, Pro-OX, and catalytic carbon—media choice depends on incoming iron concentration (up to 10 ppm), hydrogen sulfide levels, and pH. Catalytic carbon is recommended for hydrogen sulfide applications. The system requires a minimum 20 PSI inlet pressure, 120V power, and a drain line for backwash discharge. Tank size should be selected based on peak household flow demand and contaminant loading. Professional installation is recommended to ensure proper media depth, backwash flow rate, and timer programming.
Use Cases and Water Conditions
This valve is engineered for residential and light commercial well water systems with dissolved iron (up to 10 ppm), manganese, and hydrogen sulfide (rotten egg odor). Common applications include whole-house pre-filtration before water softeners or reverse osmosis systems, replacement heads for existing 2510-series tanks, and chemical-free iron filter upgrades. Suitable for homes with 1–3 bathrooms, rental properties, and light commercial installations where automated, maintenance-free oxidation filtration is required without the complexity of chemical feed systems or external aeration tanks.
