POOL AUTOFILL KEEPS RUNNING? POSSIBLE POOL LEAK
If your pool autofill keeps turning on or you constantly hear water running into the pool, there’s a good chance your pool may be losing water somewhere in the system.
Autofill systems can hide leaks for weeks or even months because they continuously replace the lost water automatically.
WHY AIR BUBBLES COME OUT OF POOL RETURNS
A pool autofill is designed to maintain the correct water level as small amounts of water evaporate naturally. But if the autofill runs too often or continuously, the pool may be replacing water lost from a leak.
Common causes include:
- Underground plumbing leak
- Skimmer leak
- Pool light niche leak
- Structural crack in the pool shell
- Equipment pad leak
- Faulty autofill valve or float assembly
SIGNS YOUR POOL MAY HAVE A LEAK
Look for these common symptoms:
- Autofill runs multiple times per day
- You hear water constantly entering the pool
- Higher-than-normal water bills
- Wet spots near the pool or equipment pad
- Pool loses water quickly when autofill is turned off
- Increased chemical usage from constant water replacement
QUICK CHECKS YOU CAN DO BEFORE CALLING A PRO
1) Turn the autofill off temporarily
If it’s safe to do so, turn the autofill off for 24 hours and monitor the water level.
If the pool loses noticeable water, there may be a leak.
2) Perform the bucket test
The bucket test helps determine whether the water loss is from evaporation or a leak.
👉 Related: Bucket Test Guide
3) Check the autofill valve
Sometimes the autofill itself is the problem. A stuck or failed float valve may continuously add water even without a leak.
4) Look for wet areas
Check around:
- the equipment pad
- pool deck
- nearby soil or landscaping
- overflow/drain areas
Persistent moisture may point to underground leakage.
WHY CONSTANT AUTOFILL USE SHOULD NOT BE IGNORED
When an autofill continuously replaces lost water, it can hide serious leak problems.
Ignoring it can lead to:
- Higher water bills
- Wasted pool chemicals
- Soil erosion under the deck
- Structural damage
- Larger underground plumbing repairs later
In Florida, long-term underground leaks can also contribute to soil instability.
HOW PROS CONFIRM A POOL LEAK
To pinpoint the source, pros may use:
- Dye testing around skimmers, lights, and fittings
- Pressure testing of plumbing lines
- Equipment inspections
- Leak isolation testing
- Listening equipment for underground plumbing leaks
Once confirmed, we recommend the proper repair based on the actual source of the leak.
WHEN TO SCHEDULE LEAK DETECTION
Schedule professional pool leak detection in Tampa if:
- Your autofill keeps running constantly
- Your water bill suddenly increases
- The pool loses water quickly when autofill is turned off
- You suspect an underground plumbing leak
- You want the leak pinpointed before it causes damage
If you’re in Tampa and your pool autofill keeps running, we can pinpoint the exact source quickly.
RELATED GUIDES
- High Water Bill From Pool Leak
- Bucket Test
- Pool Losing Water Fast
- Wet Spot in Yard Near Your Pool? Possible Underground Leak
- Pool Losing Water When The Pump Is Running?
FREQUENTLY ASKED QUESTIONS
WHY DOES MY POOL AUTOFILL KEEP RUNNING?
The most common reason is ongoing water loss from a leak, though a faulty autofill valve can also cause constant filling.
CAN AN AUTOFILL HIDE A POOL LEAK?
Yes. Because the autofill continuously replaces lost water, many homeowners don’t realize how much water the pool is actually losing.
CAN A POOL LEAK CAUSE HIGH WATER BILLS?
Absolutely. Even small leaks can waste thousands of gallons of water over time.
HOW DO I KNOW IF IT’S THE AUTOFILL OR A REAL LEAK?
Turn the autofill off temporarily and monitor the water level. The bucket test can also help confirm a leak.
CAN YOU FIND THE EXACT SOURCE OF THE LEAK?
Yes. With professional testing, we can identify whether the leak is structural, plumbing-related, or equipment-related.