Submersible Pump Maintenance Checklist
Keep submersible pumps protecting against flooding — operation and float-switch checks, seal and impeller inspection, level control verification, and alarm testing.
What is a submersible pump maintenance checklist?
A submersible pump maintenance checklist is a structured list of the 10 preventive maintenance tasks — covering visual, functional, cleaning, safety and record-keeping checks — that keep a submersible pump running safely and reliably. It groups routine checks by frequency, from daily inspections to annual servicing, so FM teams and building engineers can plan and evidence preventive maintenance.
Core submersible pump checks
- Inspect cabling, lifting chains, and guide rails for condition
- Confirm the pump(s) start and stop on the float switches / level controls
- Clean the sump/wet well of silt and debris
- Test the high-level alarm activates correctly
- Record operation, alarm test, and sump condition in the log
What is a submersible pump?
A submersible pump operates submerged in the liquid it pumps, used in drainage sumps, wells, basements, and groundwater applications to remove water and prevent flooding. Because it sits in the wet well, it relies on float switches or level sensors to start and stop, and on duty/standby arrangements and high-level alarms for resilience. Out of sight, these pumps are easy to neglect until a flood reveals a failure. Maintenance verifies operation, the level controls and floats, the impeller and seals, and the alarms — keeping the protection against flooding reliable.
This checklist is one of 25 in our plumbing and water system maintenance checklists, covering pressurisation units, booster sets, storage tanks, TMVs and water treatment — pressure, hygiene and legionella control.
Typical Submersible Pump maintenance checklist
A practical starting point for planned preventive maintenance. Always refer to the manufacturer's O&M manual and site-specific requirements.
Visual Checks
- Inspect cabling, lifting chains, and guide rails for condition
Functional Checks
- Confirm the pump(s) start and stop on the float switches / level controls
- Verify duty/standby changeover and duty rotation operate
- Inspect float switches and level sensors for fouling and free movement
- Check the impeller and inlet for blockage by debris or silt
- Confirm seal integrity and check for water ingress to the motor
- Check motor current and run pattern for signs of wear or blockage
Cleaning & Housekeeping
- Clean the sump/wet well of silt and debris
Safety Checks
- Test the high-level alarm activates correctly
Record Keeping
- Record operation, alarm test, and sump condition in the log
Download the free Submersible Pump maintenance checklist PDF
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Typical maintenance frequency
Suggested intervals for submersible pump maintenance. Actual frequencies should follow manufacturer guidance and site-specific risk assessments.
Quarterly
- •Confirm pump operation and changeover
- •Test high-level alarm
- •Check floats and inlet
Annually
- •Lift and inspect pump, impeller, and seals
- •Clean the sump/wet well
- •Cabling and guide rail check
- •Level control verification
Common faults and issues
Issues to be aware of when maintaining submersible pump equipment.
Safety and compliance notes
Key safety considerations for submersible pump maintenance. This is general guidance only — always follow OEM instructions, statutory requirements, and your organisation's safe systems of work.
Reference standards and frameworks
- United Kingdom
- SFG20 schedules and CIBSE Guide M
- North America
- ASHRAE/ACCA Standard 180 and Hydraulic Institute maintenance guidance
Frameworks commonly referenced when planning submersible pump maintenance programmes. Always confirm the requirements that apply to your site and jurisdiction.
Managing Submersible Pump documentation with PM Assist
PM Assist helps FM and building operations teams search their O&M manuals and building drawings in seconds. Upload your submersible pump documentation and ask questions like “Is this a duty/standby pump set?” or “Where is the high-level alarm indicated?” — and get source-cited answers instantly.
See PM Assist answer questions about a real submersible pump manual — try the live demo, no signup needed.
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Further reading on submersible pump maintenance
Compliance topics for submersible pump maintenance
Frequently asked questions
How often should submersible pumps be serviced?
Why do submersible pumps fail to start?
Why test the high-level alarm and standby pump?
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