Seaflo seaflo-diaphragm-pump-21-series-12v-3.8lpm-SFDP1-010-0

Seaflo Diaphragm Pump - 21 Series 12V - 3.8LPM

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The 21-Series Pumps are compact and designed for a wide range of applications including liquid transfer, spraying, circulation, filtration and dispensing. The 21-series of diaphragm pumps are self-priming and can be run dry without harm.

It provides up to 3.8 litres per minute (1.0 GPM).

This compact automatic demand water system pump has a built-in pressure switch, which automatically starts and stops the pump when faucet a is opened and closed.

Typical Applications:

  • Marine & RV Water Supply
  • Agricultural Spraying
  • General Industrial
  • OEM/ODM Applications

Features & Benefits:

  • Three Year Warranty
  • Capable of supplying 1-2 fixtures
  • Compact design
  • On-demand pressure switch
  • Adjustable pressure setting
  • Can run dry
  • Quiet operation
  • Industry standard mounting pattern


  • Housing Material: Nylon / Polypropylene
  • Valves & Seals Material: EPDM / Vition
  • Diaphragm Material: Santoprene


  • Duty Cycle: Intermittent
  • Leads: 18 AWG, 13" in length
  • Voltage: 12V

For more details see the Seaflo web site.

Part NumberFlow RateVoltageControl TypeAmpsMax PressurePortsMax Recommended TempPriming CapabilitiesWeight
SFL-SFDP1-010-040-21 3.8LPM / 1.0GPM 12V Switch 4.0A Max 40 PSI / 2.8 BAR 3/8" & 1/2" 43°C 1.2m Suction Lift 570g

Seaflo Series 21 Pumps

Seaflo Diaphragm Pump - Series 21