Skimmers and return fittings are some of the most common sources of pool leaks. They're built into the pool wall where two different materials meet — the concrete shell and the PVC plumbing — and that joint works loose over time. The good news is that many of these leaks are repairable without major work, once we confirm exactly where the water is escaping.
What a skimmer or return leak is
A skimmer is the opening at the water line that draws surface water into the pump. A return is the jet that pushes filtered water back into the pool. Both use fittings that pass through the pool wall and connect to the underground plumbing. A leak can happen where the fitting meets the shell, where the fitting meets the pipe, or inside the skimmer body itself through a crack.
Signs of a skimmer or return leak
- Water level drops to just below the skimmer opening and then slows — a classic skimmer-leak sign
- A wet spot or soft ground directly behind a skimmer or return on the deck
- A visible gap or crack where the fitting meets the tile or plaster
- The skimmer basket area sounds like it's drawing air
Why these fittings leak in South Florida
The concrete pool shell and the PVC fittings expand and contract at different rates with temperature changes, and South Florida's wide swing between hot days and cooler nights works that joint over time. Shifting sandy soil can also move the plumbing just enough to separate a fitting. Older pools with original skimmers often develop cracks in the skimmer throat — the narrow channel below the basket — after years of service.
How we find the leak
Skimmer and return leaks are usually visible enough to confirm with dye testing:
- Dye testing — with the pump off, we release a small amount of dye near the fitting. If the dye is drawn into a gap or crack, that's where water is escaping.
- Pressure testing — if the fitting itself is sound, we pressure-test the connected line to rule out a break just past the wall.
- Visual inspection of the skimmer throat, basket seat, and return face for cracks or separated sealant.
What repair usually involves
Many skimmer and return leaks are fixed by re-sealing the joint between the fitting and the pool shell, or by sealing a crack in the skimmer throat. If a fitting is cracked through, we replace the skimmer body or return fitting. When the leak is actually in the line just past the fitting, the repair follows the same process as an underground plumbing leak. We explain which case you have before any work starts.
When to call us
If your water level keeps settling right at the skimmer, or you notice a gap or crack around a skimmer or return, it's worth a check. These leaks are often straightforward to fix, but left alone they can widen and pull more water through the wall, eroding the area behind the fitting.