We have a 16x30 covered vinyl pool that sporadically leaks and needs to be re-patched every year by a service. Last summer, we ended the swimming season without problems and the water level stayed consistent to February of this year. Recently, I cleaned our DE filter, which always produces good water flow and pressure. Almost immediately after cleaning the pool with our Hayward Navigator, the water level started to decrease again and it’s now down below the skimmer intake plate.

My theory is that the Hayward, with renewed suction, is tearing at the existing patches and enabling water to find a path below the concrete. Am I nuts? How else can a pool suddenly begin leaking when it hasn’t had any activity (except for cleaning) in six months? Any thoughts? The service is coming out again Monday.

Thanks, Jon