FlowLight Booster Pump Technical Data
The Dankoff Flowlight Booster Pump provides city water pressure anywhere. It has been a standard in home renewable energy systems since 1986 and is economical for domestic water supply, drip irrigation, and water purification.
A booster pump is far more cost effective than an elevated tank, providing pressure equivalent to over 100 feet (30 m) of elevation. It uses one third to one half the energy of a conventional AC pump, eliminates high starting surges, and wearable parts typically last 5 to 10 years with an overall life expectancy of 15 to 20 years.
Suction capacity
- Low speed model: 20 vertical feet (6 m) at sea level
- Standard model: 10 feet (3 m) at sea level
- Subtract 1 ft for every 1,000 ft altitude (1 m for every 1,000 m) for both versions; suction may be further limited by intake pipe friction
- Excessive suction causes cavitation (vapor bubbles), creating noise and excessive wear — intake piping should be 1 in or larger
- Mount the pump as close to the water source as possible
Choice of capacity & voltage
- Standard model for highest flow
- Low speed model (DC only) has higher pressure capacity — best when suction lift is greater than 10 ft, intake pipe is smaller than 1 in, or extra-quiet operation is desirable
- Voltages: 12, 24 or 48 VDC; 115 VAC (low surge motor reduces inverter and wiring)
Construction
- Rotary vane pump mechanism (pulsation-free)
- Solid forged brass pump body with carbon-graphite and stainless steel working parts
- NSF approved for drinking water; handles sea water and dissolved minerals
- Survives most freezes
- Permanent magnet, ball bearing DC motor, thermally protected
- Clear flexible hoses and pressure relief valve included
Additional needs & accessories
- Battery-based power system (12 or 24 V) or AC (minimum 300 W inverter)
- Pressure tank, captive air type, minimum 40 gallon (150 l)
- Foot valve if pump is placed higher than water source
- Intake strainer/foot valve with fine monel metal screen; inline filter (10 in) with standard drinking water cartridges; intake filter/foot valve (30 in) for shallow wells
- Easy Installation Kit: pressure switch, gauge, check, drain and shut-off valves, tank tee
- Dry run switch prevents battery drain and pump damage if the source runs dry
Installation, dimensions & warranty
- Mount horizontally or vertically; must not be submerged; fits inside a 6 in or larger well casing suspended by rope
- Length 16.5 in (42 cm); weight 15 lb (7 kg); flexible hose ends have ¾ or 1 in male pipe thread
- Water must be filtered clear — this pump cannot tolerate dirt
- Warranty: 1 year against defects in materials and workmanship
Performance — Standard 2920-V vs Low Speed 2910-V
V = voltage; specify 12, 24, 48, 115 AC. Low speed model has higher suction lift capacity.
| Standard Model 2920-V | Low Speed Model 2910-V | |||||||
|---|---|---|---|---|---|---|---|---|
| Pressure PSI (kg/cm²) | 30 (2.1) | 40 (2.8) | 50 (3.5) | 65 (4.6) | 30 (2.1) | 40 (2.8) | 50 (3.5) | 65 (4.6) |
| Flow rate GPM (lpm) | 4.5 (17) | 4.3 (17) | 4.3 (16) | 4.1 (15) | 3.4 (13) | 3.3 (12) | 3.1 (12) | 2.7 (10) |
| Watt-hrs per gallon (per l) | 0.6 (0.16) | 0.67 (0.18) | 0.75 (0.2) | 1.1 (0.3) | 0.6 (0.16) | 0.67 (0.18) | 0.75 (0.2) | 1.1 (0.3) |
| Amps at 12 V | 13 | 15 | 16 | 22 | 10 | 11 | 12 | 15 |
| Amps at 24 V | 6.5 | 7.5 | 8 | 11 | 5 | 5.5 | 6 | 7.5 |
| Amps at 115 V AC | 1.7 | 2 | 2.1 | 2.9 | — | — | — | — |
Transcribed from the official Dankoff Solar technical data sheet. Subject to technical changes — the PDF is the authoritative version. Not sure this is your pump? The calculator will match one to your system.
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