Can Pool Cover Pumps Be Completely Submerged? Safety Guide

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Quick Answer

Pool cover pumps fall into two categories: submersible and non-submersible. Only submersible pool cover pumps can be completely submerged safely. Non-submersible pumps must never be fully underwater as this will destroy the motor and create serious electrical hazards. Always check your pump's specifications before installation.

Step-by-Step Guide to Safe Pool Cover Pump Submersion

Step 1: Identify Your Pump Type

1. Check the manufacturer's label on your pump housing for "submersible" designation
2. Look for an IP (Ingress Protection) rating of IP68, which indicates complete waterproof protection
3. Review your owner's manual for specific submersion guidelines
4. Popular submersible models include the Little Giant APCP-1700, Wayne WaterBUG, and Superior Pump 91570
5. If you cannot locate documentation, contact the manufacturer directly with your model number

Step 2: Inspect the Pump Before Submersion

1. Examine all electrical connections for damage, corrosion, or loose wires
2. Check that all seals and gaskets are intact and properly seated
3. Verify the power cord has no cuts, nicks, or exposed wiring
4. Ensure the intake screen is clean and free of debris
5. Test the float switch mechanism by lifting and lowering it manually
6. Confirm all housing screws are tight and the motor casing shows no cracks

Step 3: Prepare the Installation Area

1. Clear the cover area of leaves, debris, and sharp objects that could damage the pump
2. Identify the lowest point on your pool cover where water naturally collects
3. Ensure you have a GFCI-protected electrical outlet within reach of the power cord
4. Never use extension cords with pool cover pumps as this creates safety hazards
5. Position the pump away from pool edges to prevent it from falling into the pool if the cover fails

Step 4: Install the Submersible Pump Safely

1. Connect the pump to the GFCI outlet before placing it in water
2. Lower the pump gently into the deepest water area on the cover
3. Allow the pump to settle naturally on the cover surface
4. Ensure the intake is completely submerged but the discharge hose remains above water level
5. Position the float switch so it can move freely without obstruction
6. Route the discharge hose away from the pool area to prevent water from flowing back

Step 5: Test the System

1. Plug in the pump and verify it starts automatically when the float rises
2. Watch for steady water flow through the discharge hose
3. Check that the pump shuts off when water level drops and the float falls
4. Listen for unusual noises that might indicate problems
5. Verify the GFCI outlet is functioning by testing its reset button
6. Monitor the first few cycles to ensure proper operation

Critical Safety Warnings

Never attempt to submerge a non-submersible pump. These units have ventilation holes and unsealed electrical components that will cause immediate failure and potential electrocution hazards. Non-submersible pumps are designed to sit on top of solid covers or decks where they can remain completely dry.

Always use GFCI protection when operating any electrical equipment near water. Even submersible pumps can develop seal failures over time, making GFCI protection essential for preventing electrical shock.

Signs Your Pump Should Not Be Submerged

• Ventilation holes or cooling fins on the motor housing
• Electrical connections that are not waterproof
• Labels indicating "not for submersion" or similar warnings
• Suction hose connections rather than direct intake designs
• Open motor housings without sealed enclosures

Maintenance for Submerged Cover Pumps

Submersible pumps require regular maintenance even though they're designed for underwater operation. Remove the pump monthly during heavy use periods to clean the intake screen and inspect seals. Replace worn gaskets immediately, as water intrusion will destroy the motor. Store pumps in a dry location during off-season to extend their lifespan.

Check the float switch regularly, as this is the most common failure point. Debris can jam the float mechanism, causing the pump to run continuously or fail to start. Clean around the float housing and test its movement each time you inspect the pump.

When to Replace Your Cover Pump

Replace submersible cover pumps immediately if you notice water inside the motor housing, unusual electrical odors, or failure to start. Continuing to use a compromised pump creates serious safety risks and may damage your electrical system. Quality submersible cover pumps typically last 3-5 years with proper maintenance.