SEAFLO SFMP2-120-01 24V 12GPM Marine RV Waste Macerator Pump
MP212001
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Waste-tank evacuation for 24V boats and RV systems
The SEAFLO SFMP2-120-01 is a 24V DC macerator pump for emptying compatible marine and RV holding tanks through a 1-inch discharge hose. Its four-blade macerating section reduces waste before pumping, with a nominal maximum open flow of 12 GPM (45 L/min).
It is intended for controlled black-water or waste transfer to a legal pump-out or disposal connection. It is not a continuously running sewage pump and must never be used to discharge where prohibited.
Macerator and service features
- Four-blade macerator design helps reduce clogging and improve waste breakdown.
- Self-priming positive-displacement pump for holding-tank evacuation.
- Sealed, thermally protected and ignition-protected motor.
- Manual rear access knob allows the shaft to be turned if a blockage occurs.
- Short-period dry-run capability for final tank clearing; prolonged dry running should be avoided.
- Designed for longer discharge runs than gravity emptying, subject to hose resistance and lift.
- Maximum recommended liquid temperature of 60°C (140°F).
Technical specification
| Manufacturer model | SFMP2-120-01 |
| Supply voltage | 24V DC |
| Nominal open flow | Up to 12 GPM / 45 L/min |
| Published maximum current draw | 6.0 A |
| Inlet | 1-1/2 in MNPT |
| Discharge | 1 in hose barb |
| Macerator | Four-blade design |
| Motor protection | Sealed, thermally protected and ignition protected |
| Maximum liquid temperature | 60°C (140°F) |
| Approximate dimensions | 350 × 130 × 110 mm |
| Approximate unit weight | 2.07 kg |
System compatibility and safety checks
- For 24V DC boats or RV systems only; do not connect directly to 12V.
- Confirm the holding-tank outlet uses 1-1/2 in MNPT and the discharge can accept 1-inch sanitation hose.
- Use a correctly rated fuse, heavy-duty switch and marine cable sized for the run and motor starting load.
- Install accessible for blockage clearing and impeller/macerator service; fit valves so the pump can be isolated safely.
- Never operate against a closed valve or blocked hose. Flush the system according to the manufacturer's procedure after use.
- Follow all local pump-out, environmental and sanitation rules; overboard black-water discharge may be illegal.
- Package: one macerator pump. Valves, sanitation hose, fittings, fuse and switch are separate.
Frequently asked questions
Can it connect directly to an RV 3-inch bayonet outlet?
No. This 01 version uses a 1-1/2 in MNPT inlet; the separate 02 version uses a 3-inch RV connector.
Can it run continuously?
No. It is intended for intermittent tank-emptying duty, not continuous sewage circulation.
What is the rear knob for?
It lets the shaft be turned manually to help release a blockage with power isolated.
Can it discharge waste overboard?
Only where explicitly legal and permitted. Use approved pump-out or disposal facilities and follow local regulations.
For the products under £150 the shipping is £6.99.
Free delivery for most items over £150.
