The 33-Series is Seaflos's general-duty on-demand positive displacement pump. It provides reliable performance in high water flow and moderate pressure applications. This 3-chamber diaphragm pump provides 11.3 litres per minute and is capable of self-priming up to 6vertical feet, and can run dry without damage. Serves 3 or more 1/2” (13 mm) outlets. This automatic demand water system pump has a built-in pressure switch, which automatically starts and stops when the faucet is opened and closed. They're easy to install and service.

Seaflo 33 Series Features and Benefits

  • On-demand use
  • Capable of supplying1-2 fixtures
  • Adjustable pressure switch
  • Continuous Duty and Run dry safe
  • Self-priming
  • 16AWG,4.5"long Leads
  • Meets or exceeds RoHS, SGS, and ISO standards
  • 3 Year Warranty

Suitable for

  • Yacht / RV / Caravan pressurised water system
  • Sprayer fixtures (vehicle-mounted sprayers, electric sprayers)
  • Cleaning machines, humidifier, water purification, medical apparatus
  • Food beverage filling & liquid transfer
  • Solar water system
  • Any other pressurisation system



Type 3 Chamber positive displacement diaphragm pump, self priming, capable of being run dry
Control Type Pressure switch
Max Recommended Temperature 60° C(140° F)
Priming Capabilities 6 feet (1.8 m) suction lift
Re-start Pressure Shut-off Pressure 45 PSI : 35 PSI ±5 PSI (±0.3 bar)
Inlet/Outlet Ports 1/2"-14 MNPT
Weight 4.2 lbs (1.9 kg)


Leads 16 AWG, 13" (33 cm) long with 2-Pin connector / Leads
Duty Cycle Intermittent
Max.Amp Draw 4.0 A
Fuse 10.0 A


SKU SFL.SFDP2-030-045-33
Model # SFDP2-030-045-33
Brand SeaFlo
Shipping Weight 2.1000kg
Shipping Width 0.270m
Shipping Height 0.150m
Shipping Length 0.150m
Shipping Cubic 0.006075000m3

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