In Ventura County, a swimming pool is a prized asset. But keeping it filled can sometimes feel like a full-time job. You might notice the water level dropping an inch or two a week. Is it the summer heat? Is it the wind? Or do you have a crack in a return line bleeding hundreds of gallons into the dirt?
Diagnosing a pool leak is tricky because evaporation is a real factor. A large pool surface area combined with dry Santa Ana winds can cause significant water loss naturally.
Before you call for a professional leak detection service, there is a simple, scientific experiment you can do yourself to rule out evaporation. It’s called the Bucket Test.
How to Perform the Bucket Test
The goal is to compare the water loss in your pool to the water loss in a controlled environment (the bucket).
- Fill the Bucket: Fill a 5-gallon plastic bucket with pool water about 3-4 inches from the top.
- Place it: Set the bucket on the first or second step of your pool (immerse it so the water temperature stays the same as the pool).
- Mark the Levels: Use a piece of electrical tape or a grease pencil to mark the water level inside the bucket. Then, mark the water level of the pool on the outside of the bucket.
- Wait 24 Hours: Turn off the pump and auto-fill. Let the pool sit still for 24 hours.
- Compare: If the pool level (outside mark) dropped more than the bucket level (inside mark), you have a leak.
If both levels dropped the same amount, it’s just evaporation. Swimming Pool Steve notes that wind and low humidity can cause up to 1/4 inch of loss per day, but anything beyond that is likely a structural or plumbing failure.
The Most Common Culprits
If the Bucket Test confirms a leak, the next question is: where?
- The Skimmer Throat: This is the most common leak spot. The plastic skimmer is encased in concrete. As the ground shifts, the plastic separates from the concrete pool shell, creating a crack where water escapes.
- The Light Niche: The conduit that carries the electrical cord to your pool light is a hollow tube. If the seal (putty) around the cord fails, water drains right out the back of the light fixture.
- Underground Plumbing: As discussed in previous posts, the PVC return lines running under your deck can crack due to root intrusion or soil settling.
Detecting Leaks in Vinyl and Fiberglass
Finding a leak in a concrete (gunite) pool is one thing, but vinyl liners and fiberglass shells present unique challenges. A tear in a vinyl liner can be the size of a pinhead.
We use Electronic Leak Detection (The “Leak Trac” Method). We drop a voltage probe into the water. Since vinyl is an insulator, electricity shouldn’t pass through it. However, if there is a hole, the electricity “grounds out” through that hole to the earth behind it.
The device leads us directly to the tear by following the flow of electricity. It acts like a compass pointing to the leak. This allows us to patch the liner underwater without draining the pool, saving you thousands on water replacement and liner repairs.
Your Ventura County Experts for PVC Leak Detection
Don’t let your pool drain your bank account. Confirm the leak, then let us find it.
Quest Leak Detection uses specialized hydrophones and electrical scanners to pinpoint pool leaks fast. Visit our PVC Leak Detection page to stop the drop, or Contact Us to schedule a pool inspection.
