Seaflo 33 Series DC Diaphragm Pump
The 33-Series is our general-duty on-demand positive displacement pump.
It provides reliable performance in high water flow, moderate pressure applications.
This 3-chamber diaphragm pump provides up to 3.0 gallons 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, service and winterize.
Features
- Capable of supplying 2-3 fixtures.
- Up to 3.0 GPM.
- Self priming.
- On-demand use.
- Industry Standard mounting pattern.
- Completely rubber mounting-base.
- Adjustable pressure switch.
- 16 AWG, 4.5"(11.4 cm) long Leads.
- Meets or exceeds RoHS, SGS, and ISO standards.

| Part Number | Pump Capacity | Voltage |
Max Draw |
Shut Off Pressure | Priming Capabiltites |
Max Recommended Temperature |
Ports |
|---|---|---|---|---|---|---|---|
| SFL-SFDP1-030-045-33 | 2.8-3.0GPM / 10.6-11.3L p/m | 12V | 6.74A |
45PSI / 3.1BAR |
6 feet (1.8 m) suction lift |
140° F (60° C)Max. |
1/2"-14 MNPT |
| SFL-SFDP2-030-045-33 | 2.8-3.0GPM / 10.6-11.3L p/m | 24V | 3.40A |
45PSI / 3.1BAR |
6 feet (1.8 m) suction lift |
140° F (60° C)Max. |
1/2"-14 MNPT |
| SFL-SFDPA2-030-045-33 | 2.8-3.0GPM / 10.6-11.3L p/m | 220V | 0.80A |
45PSI / 3.1BAR |
6 feet (1.8 m) suction lift |
140° F (60° C)Max. |
1/2"-14 MNPT |