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Water Pump

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SEAFLO – SFDP1-030-055-42 (12V 3.0GPM/11.3LPM) –

Adjusting the Pressure Setting of Your RV Water Pump

  1. Locate the water pump in your RV and make note of the brand and model. The steps for adjusting the pressure settings may vary slightly depending on the pump’s brand.
  2. For the most common brands like Flojet, Shurflo, and Seajet, follow these directions. However, keep in mind that not all makes and models of pumps are adjustable.
  3. The goal is to adjust the cut-off point of the pump. Begin by removing the cover plate on the pressure switch. Inside, you should find a screw with a Phillips head (cross-head) between two electrical connectors. The direction in which you turn the screw depends on your desired outcome.
  4. To lower the cut-off pressure, unscrew the screw slightly. Turn it clockwise to increase the cut-off pressure and stop the pulsing, or counterclockwise to lower the cut-off pressure.
  5. Note that adjusting the screw does not affect the flow rate; it only adjusts the cut-off pressure. Each system usually has an optimal setting. Additionally, as the pump ages, the tension of the spring may change, requiring a small adjustment to prevent pulsing.
  6. Adjust the screw until the pump delivers a steady flow. Then turn off the water and ensure that the pump shuts off within approximately 10 seconds. Once you achieve this, you have found the pump’s sweet spot.

Adjusting the Pressure Setting of a Seaflo Water Pump

  1. Locate the housing at the end of your water pump where the pipe is connected. Look for two red wires coming from the housing. You should find an Allen screw (sometimes called a hex-key screw) here.
  2. Turn on the tap to create pressure.
  3. Turn the pressure adjustment screw clockwise to stop the pulsing.
  4. Turn off the tap and test if the pump shuts off. If it doesn’t, turn the screw slightly counter clockwise until the pump stops.

Other Possible Causes of RV Water Pump Pulsing

Aside from pressure sensor misadjustments or failures, there are other potential reasons for pulsing in an RV water pump:

  1. Plumbing system leak: Pulsing could be caused by a leak anywhere in the system, including within the water pump, pipes, valves, or filters. When there’s a leak, maintaining pressure becomes challenging for the water pump, resulting in pulsing or continuous operation.
  2. Low fresh water tank level: The pulsing of water from your RV’s pump may be due to the pump compensating for what it perceives as low pressure, even though the tank is empty or nearly empty.

Replacing Your RV Water Pump as a DIY Project

Yes, you can replace your RV water pump as a DIY project. Even the best RV water pumps can fail over time and usage. If your water pump has failed, you can easily replace it yourself, making it a straightforward DIY project.

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