
Self-Cleaning Disc Filter Battery for Off-Grid Sites
Remote pump stations, vineyards and field blocks often sit far from line power. This 2 in Netafim battery is built for those sites, with DC solenoids on both backflush valves. A 12 VDC controller can run it from a battery or a small solar panel. Inside, two filters carry stacks of red 120 mesh discs that stop particles down to 130 microns. Water is forced through the grooves along the full depth of each disc. That gives the self-cleaning disc filter more holding capacity than a surface screen of the same size. Netafim rates the pair for 50 to 160 gallons per minute. Clean surface water at 120 mesh allows about 150 GPM on average quality sources. Very poor water, such as muddy canals, drops the recommended maximum to roughly 70 GPM. Sand loads above 3 ppm call for a hydrocyclone or other pre-filter ahead of the discs. Polypropylene bodies, covers and manifolds will not rust in fertigation service. The assembled unit weighs about 174 pounds and arrives tested.
Wiring a DC Solenoid Backflush System
Pair the battery with a DC backflush controller, which is sold separately. Confirm the solenoid voltage matches the controller before connecting any wires. The common terminal serves every solenoid, while each filter gets its own numbered lead. Use 16 gauge wire or larger inside half-inch conduit. When the controller calls for a flush, filter one reverses flow while filter two keeps feeding the field. Each complete cycle sends roughly 24 gallons of water to the drain. Hold at least 30 psi downstream and 35 GPM per filter during the flush. Normal operation runs from 20 to 90 psi with water up to 158 °F. Begin with a 20 second flush time and a 10 second dwell. Set the pressure differential trigger 5 psi above the clean reading. Flush the upstream main line before first startup to clear construction debris. Inspect discs and seals at the start of each season.
Key Features
- DC Solenoids: Runs from battery or solar controllers.
- Two 2 in Filters: 120 mesh, 130 micron discs.
- 50-160 GPM: Fits small field and vineyard blocks.
- Depth Filtration: Traps dirt through the full disc stack.
- Corrosion Resistant: Polypropylene and nylon construction.

Technical Specifications
| Specification | Value |
|---|---|
| Brand | Netafim |
| Item Number | 70610-022002 |
| Model Number | 26LP2PP2120DC |
| Type | Automatic backflushing filter battery, disc type |
| Filters | 2 x 2 in LP Disc-Kleen |
| Filtration | 120 mesh (130 micron), red discs |
| Flow Range | 50-160 GPM |
| Max Flow by Water Quality (120 mesh) | 160 / 150 / 120 / 70 GPM (good / average / poor / very poor) |
| Inlet and Outlet | 4 in grooved |
| Drain Manifold | 2 in grooved, installed |
| Solenoids | DC (12 VDC) |
| Operating Pressure | 20-90 psi |
| Min Backflush Pressure | 30 psi downstream |
| Min Backflush Flow | 35 GPM per filter |
| Backflush Volume | 24 gal per cycle |
| Max Water Temperature | 158 °F |
| Min pH | 5 |
| Materials | Polypropylene manifold, body, cover and discs; nylon spine; EPDM seals |
| Backflush Valves | Plastic, reinforced polyamide |
| Length (A) | 20 7/16 in |
| Weight | 174 lb |
| Controller | Backflush controller sold separately |