Steps for Installing a Submersible Borehole Pump

The submersible borehole pump is a type of pump that serves a wide range of applications — from everyday domestic use and agricultural irrigation to aquaculture, and of course industrial extraction and production.

Depending on the task at hand, submersible borehole pumps differ in power output, dimensions, and brand. In general, however, the installation and operation of these pumps follow the same fundamental steps that Thái Khương Pumps outlines below. Read on for a complete reference!

Steps for Installing a Submersible Borehole Pump

Proper submersible borehole pump installation ensures the pump operates reliably and delivers consistent performance over a long service life. The following steps will help users understand the installation process in detail:

Survey the Installation Site

• Inspect the well: check for visible damage to the well casing, and measure the static water level and the total depth.
• Measure the total well depth — the distance from ground level to the bottom of the well.
• Head — the vertical distance from the pump to the point where water is discharged or delivered to the storage tank.
• Flow rate — the volume of water the pump delivers per minute or per hour.

Inspect the Submersible Borehole Pump

Inspect the submersible motor in detail and identify an appropriate power supply. Determine whether the motor requires single-phase (2-wire) or three-phase power, and whether a control panel is needed for the pump.

Next, verify that the electrical cable is compatible with the motor type, and that the pump motor is suitable for the type of water or liquid to be pumped. Finally, check that all fittings are compatible with the pump outlets, the main pipe, and the wellhead cap.

Attach the Motor to the Pump

Apply grease to lubricate and seal the coupling shaft on the pump assembly. Secure the motor to the pump using poly tape or screws.

Connect the Power Supply to the Motor

When connecting the cable to the motor leads of the submersible borehole pump, ensure that all splices are completely watertight and prevent water ingress. This step requires strict adherence to the manufacturer’s wiring instructions.

Connect the Pipe to the Pump

Attach the drop pipe fitting to the pump, then lower it into position. Attach the wellhead cap to the other end of the drop pipe.

Secure the Safety Cable to the Pump Body

Attach a stainless steel safety cable to the submersible borehole pump, then run it alongside the drop pipe. Fasten the end of the safety cable to the wellhead cap to keep the drop pipe taut.

Secure the electrical cable to the drop pipe using 4–6 wraps of tape at every 4–6 metre interval.

Cable ties may also be used. Allow some slack so the drop pipe can expand lengthwise. Users may also tape the entire length of the cable splice joint to the drop pipe for added protection. Note: leave an extra few metres of slack cable doubled back and taped firmly to the drop pipe just below the wellhead cap. This extra length makes it easier to replace cable splices or swap out the motor in the future.

Verify that all components are securely connected, check that all cables are safely fastened, and inspect the cable for any excess slack.

If the pump assembly is light enough to handle manually, begin carefully lowering the pump head into the well with a second person holding the wellhead cap. Lower the pump into the borehole, paying close attention to any risk of damage to the drop cable during the descent. Note: during the entire installation of the submersible borehole pump, the wellhead cap must remain suspended above the top of the pump casing at all times.

If the submersible borehole pump is too heavy to handle manually, a hoist or other lifting device should be used.

Select an appropriate position for the hoist. Hook the wellhead cap onto the hoist hook. Then slowly lower the hoist to bring the submersible borehole pump into the correct position.

Connect the pump power supply, the pump control system, and the pump protection equipment, then run an initial test.

Once the initial test is complete, proceed to connect the discharge piping to the wellhead cap. Finally, verify the pump’s operation, confirm that the pumping process is running correctly, and ensure that all control and protection devices are functioning properly.

We hope this article has been a helpful reference for the key steps involved in installing a submersible borehole pump.

Thái Khương currently supplies submersible pumps and borehole / submersible borehole pumps of Italian origin, compliant with EU and G7 standards. If you are in need of a pump but are unsure which model to choose, please contact Thái Khương Pumps for a free consultation.

Thái Khương Pumps is always ready to listen and support you.