February 20, 2025

Equipment Maintenance is Key to Dewatering Projects: Submersible Pump Maintenance

Nothing slows down a dewatering project more than equipment that malfunctions or breaks and needs to be replaced or repaired before water can flow again. Because submersible pumps are an integral part of many dewatering applications – from groundwater pumping during excavation, to sewer bypasses and quarry and mine dewatering – routine maintenance and servicing of submersible pumps is vital. Without it, there’s a risk of a water management job slowing, or stopping, with all the associated downtime costs.

Maintaining Submersible Pumps for Dewatering Applications

Routine inspections will help identify potential problems before they cause significant damage to the submersible pumps that are such a vital part of dewatering projects. Regular cleaning, maintenance and minor adjustments to the pump improves its efficiency, extends its lifespan, and reduces the risk of unexpected breakdowns.

Without regular maintenance, small problems – such as a clogged intake or worn-out seal – can escalate into larger, more expensive issues. Routine maintenance can catch these problems early, preventing costly repairs and extending the pump’s lifespan. Most importantly, maintaining the pump helps ensure that it operates smoothly and efficiently during water transfer jobs.

Components of Submersible Pumps that Require Regular Maintenance

Certain parts of a submersible pump are more vulnerable to wear, tear, and damage from water and debris. These components require more attention during regular inspection and maintenance.

• Pump intake and discharge: The intake draws water into the pump, and the discharge expels it. Blockages or restrictions at either point can compromise pump performance. Regularly inspect these areas for debris to maintain optimal water flow during the water transfer project.
• Seals and gaskets: Seals and gaskets prevent water from leaking into sensitive parts of the pump, like the motor. If they become worn or damaged, water may infiltrate the system and cause significant issues. Check for signs of wear, such as cracking or stiffness, and replace damaged seals and gaskets at the first sign of problems.
• Electrical connections: Loose or corroded connections can disrupt electrical flow which leads to inconsistent operation or pump failure. It’s also a major safety concern. Inspect all connections for corrosion and make sure they are tight and secure.
• Impeller: The impeller moves water through the system. Over time, it may become damaged or eroded, reducing the pump’s efficiency. Inspect the impeller for cracks, chips, or signs of wear, and replace it if necessary.
• Motor: The motor drives the impeller and powers the pump. Listen for any unusual noises or irregularities during operation and monitor the temperature of the motor.
• Check valve: The check valve prevents water from flowing back into the pump when it’s not running. A malfunctioning check valve can lead to backflow, which can stress the pump and reduce its lifespan. Regularly test the check valve to make sure it’s working correctly.

Submersible Pump Service and Maintenance Schedule

The schedule for routine maintenance pumps depends on their use. If a submersible pump is running 24/7 in a water transfer or dewatering application, oil and seal changes will need to occur about every three months. For intermittent operation, plan on six-month intervals.

Check cables, cable seals, pipes, hoses and valves monthly, and replace these parts if deteriorated or damaged. A visual inspection of the pump’s exterior should identify any loose or damaged screws or bolts, and help determine the condition of the lifting handle.

Certain submersible pump parts – like the impeller, diffusor and ball bearings – will wear out over time. Those should be checked every the three months and the ball bearings replaced annually.

Anytime the pump has a low output, is exceptionally noisy or vibrating, or there are fluctuations in flow rates it’s vital to inspect the pump for problems. In many pumping jobs, FieldForce deploy’s Keystone Clearwater’s WaterForce® automated control system to make sure the pumps are running properly. With WaterForce we can also monitor flow rates and pressure, 24/7. That way, if there is a problem, we can respond quickly and decrease downtime.

Submersible pumps for rent or purchase in the Mid-Atlantic

FieldForce provides engineering services and equipment for dewatering and water management projects in the municipal, construction, manufacturing, and industrial sectors. Our inventory includes Atlas Copco pumps, compressors, and generators for rent or purchase, and temporary piping, filtration equipment, and light plants available to rent. We maintain our fleet at yards in the greater Pittsburgh area, West Virginia, and central Pennsylvania for convenient availability.

With an experienced, skilled, workforce and a full range of equipment to rent, FieldForce has the expertise, knowledge, and the assets to serve water transfer needs across the Mid-Atlantic region. Contact us today for details.