- Sku: R35740USA-OB
- Vendor: Red Sea
Red Sea ReefRun G2 12000 Controllable DC Pump - Open Box
The Red Sea ReefRun G2 12000 is the largest pump in Red Sea's ReefRun G2 line of controllable DC return pumps. It moves 1,300 to 3,200 gallons per hour with a maximum head height of 19 ft, and uses only 33 to 105 W. Run it on its own with the included inline Flow Controller, or connect it to the ReefRun Dual Controller (sold separately) to control it from the ReefBeat app over Wi-Fi.
Features
- Integrated Flow Controller. The included inline Flow Controller runs the pump on its own: switch it on or off and adjust flow in 20% steps, with indicator LEDs showing the flow rate and any error state.
- ReefBeat ready. Connect the ReefRun Dual Controller (sold separately) to control up to 2 ReefRun DC return pumps or DC skimmers from the ReefBeat app over Wi-Fi.
- Built-in protection. The pump shuts itself down if it runs dry or the impeller cannot turn, and can be restarted from the controller or app once the problem is fixed.
- Virtually silent and energy efficient. 33 to 105 W across the full flow range.
- 180° rotating outlet and an inlet flow guide that helps prevent air intake.
- 10 ft power cable with a conveniently placed connector.
- Fits common plumbing. Comes with hose barbs, PVC pipe adapters and threaded outlet fittings.
Specifications
| Brand | Red Sea |
| Model | ReefRun G2 12000 (R35740USA) |
| Flow rate | 1,300 to 3,200 US gph (5,000 to 12,000 L/h) |
| Max head height | 19 ft (5.8 m) |
| Power | 33 to 105 W |
| Dimensions | 9.3" L x 5.3" W x 6" H |
| Impeller chamber inlet | 40 mm / 1¼" |
| Outlet fittings | Hose barbs for 25/32 mm (1" / 1¼") tube, 1" GAS threaded, PVC pipe adapters 32 mm (1") and 40 mm (1¼") |
| Power cable | 10 ft (3 m) |
| Installation | Submersed, inside a sump |
| Control | Inline Flow Controller (included); ReefRun Dual Controller + ReefBeat app (sold separately) |
| Warranty | Red Sea: 2 years on the motor, 6 months on the impeller (a wear item) |
What's Included
- ReefRun G2 12000 DC pump
- Inline Flow Controller
- Power supply
- Pump outlet fittings
Recommended Pairings
- Red Sea ReefRun Dual DC Pump Controller for ReefBeat app control, scheduling and alerts
FAQ
Do I need a separate controller?
No. The included inline Flow Controller runs the pump on its own. Add the ReefRun Dual Controller (sold separately) if you want ReefBeat app control over Wi-Fi.
How much flow does it have?
1,300 to 3,200 US gph (5,000 to 12,000 L/h), with a maximum head height of 19 ft.
What size plumbing does it take?
The impeller chamber inlet is 40 mm / 1¼". Outlet fittings cover 1" and 1¼" hose, 1" GAS thread, and 32 mm or 40 mm PVC pipe.
Can it run dry?
It is designed to run submerged in a sump. If it does run dry or jams, it shuts itself down to protect the pump.
What is the warranty?
Red Sea warrants the motor for 2 years and the impeller, a wear item, for 6 months from the date of purchase.
Have a question?

Red Sea ReefRun G2 12000 Controllable DC Pump - Open Box


