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Step-by-step Guide to Installing a 12-Volt Water Pump: Shurflo 12 Volt 4009

Posted by John M on

Installing a 12-volt water pump, specifically the Shurflo 12 Volt 4009, is a project that any DIY enthusiast can take on with some time, patience, and the right knowledge. This guide will walk you through the process of installing your pump, including an accumulator tank and pre-filter, and using 1/2 bsp John Guest fittings and pipes.

Step 1: Gathering the necessary materials

Before you begin the installation, ensure you have all the necessary tools and parts. You will need:

Step 2: Prepare the Installation Area

The pump should be installed in a dry, well-ventilated location, ideally as close to the water tank as possible. A flat, horizontal surface is recommended. Make sure there's enough space for the accumulator tank and pre-filter.

Step 3: Install the Pre-Filter

The pre-filter should be installed before the pump to prevent debris from damaging the pump. Connect a length of John Guest pipe to your water tank, and attach the other end to the pre-filter using a 1/2 bsp John Guest fitting.

Step 4: Connect the Pump

Attach the outlet side of the pre-filter to the inlet side of the pump using another piece of John Guest pipe and a 1/2 bsp John Guest fitting. This should be a simple push-fit connection.

Step 5: Install the Accumulator Tank

The accumulator tank should be connected to the outlet side of the pump. Using a new piece of John Guest pipe, connect the outlet of the pump to the accumulator tank using a 1/2 bsp John Guest fitting.

Step 6: Final Connections

From the accumulator tank, route another piece of John Guest pipe to your faucet or other outlets in your system.

Step 7: Electrical Connections

The Shurflo 4009 operates on a 12-volt DC power supply. Connect the red wire to the positive terminal of your power source, and the black wire to the negative terminal. Install the recommended size fuse in the positive wire between the battery source and the pump.

Step 8: Prime the Pump

Before operating the pump, you must prime it. To do this, fill your water tank, ensure all the fittings are secure and turn on the pump. Open your faucet and allow water to flow until it runs steadily with no air bubbles.

Step 9: Adjust the Accumulator Tank

If the pump cycles on and off rapidly, you may need to adjust the pressure in your accumulator tank. Follow the manufacturer's instructions to do this.

Step 10: Test the System

Once everything is connected, switch on the pump. If it doesn't start, check your electrical connections. If the pump is noisy, check that all pipes are secure and that the pump is firmly mounted.

This process might seem complex at first glance, but once you understand the basic principles, it is relatively straightforward. A well-installed water pump can significantly improve the water flow in your RV, boat, or off-grid home. Always refer to the user manual provided by the manufacturer for specific instructions related to your pump model and setup.

Finally, remember, safety should always be your first priority. If at any point you are unsure about the installation, don't hesitate to give us a call 0800 303 306.


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