3 Hassle-Free Tips for Installing a DC Water Flow Pump

DC water flow pumps provide a super safe, low voltage, energy efficient, controllable option for aquarium return pumps. They can be used both internally (submersible) or externally (inline). Before getting started with your installation, here are a few quick ways to ensure everything goes smoothly.

Each eFlux DC flow pump includes quick disconnect fittings, use them!:

  • The 6008 features an inlet that accepts either 1.25” hose or 1” PVC. If you’re planning on using the pump strainer, install the inlet fitting then slide the strainer over it. The outlet features both 1” and ¾” hose fittings or you can plumb ¾” PVC to it.
  • The 6010 and 6011 feature an inlet that accepts both 1.25” and 1.5” hose, the outlet includes both 1” and 3/4” hose fittings. Both inlet and outlet can also be attached using a 1.25” fnpt pvc fitting; just be sure to use Teflon paste and not Teflon tape, which might crack the fitting.
  • In submersible applications, make sure you don’t get the inlet too close to a sump wall with no strainer – otherwise the pump can get stuck to the side wall.

Become familiar with the DC flow pump controller, as it can help you with troubleshooting. The DC controller HUB features:

  • An adjustable speed dial from 20% to 100% flow. The low speed setting ensures the impeller will not spin backwards during back siphoning.
  • A 24V DC plug
  • DC Pump Plug
  • A red power indicator. When the pump is ON, the red indicator light will be on. If it’s blinking, it indicates an issue with the pump:
    1. There is a power issue – either the plug has come out of the controller, the power supply is failing or the power supply is overheating. Check all plugs and check the power supply.
    2. Low water issue – the pump has identified the water level in your sump is too low (sucking air into the pump) or the absence of water.
    3. Over temperature – the pump or controller is overheating. If the controller is located in an enclosed cabinet, move it to a location where there is more air flow for cooling.
  • A FEED button indicator. If the light is illuminated, the pump is in feed mode. One note – the pump must be connected to a LOOP IC controller for FEED mode to work. The pump runs at 20% speed for 10 minutes, then will slowly ramp up. Another tip – if your pump is in FEED mode and you disconnect the microUSB cable, it will be stuck in FEED mode. You will need to reset it by disconnecting power and reconnecting it.
  • Pump indicator light – indicates which pump should be connected to the controller.
  • 4 microUSB ports – all for communication.

Make sure you size your return pump correctly.

  • Take the total system volume (tank, sump, plumbing combined) and multiply it times 5 to get the minimum turnover rate per hour.
  • You’ll also want to ensure the model flow pump you choose has a high enough head pressure.

Remember to clean your eFlux DC water flow pumps at least every 4-6 months to prevent buildup (for a refresher on the easiest ways to clean them, read our blog). [link]
One thing to remember with any water turn pump is always use a larger hose or pipe size on the inlet and smaller on the outlet. Pumps are made to pump water, not suck water, so you don’t want to restrict the inlet.

We hope these tips make your DC flow pump installation a breeze!