autofill question / problem


LifeTime Supporter
Jun 7, 2012
Ok, so we've had the pool about 18 months, and I've been saying all along that the autofill isn't working properly, and I finally got my husband to listen. :)

The autofill appears to be set to the appropriate level. However, if I have the valve at the hose bib open, the pool will gradually fill over 3-5 (it moved about a 1/2 inch higher in 36 hours since we marked it). But I can't hear the water running like you do if we raise/lower the float. It seems silent - I just went out and verified that I can hear it when I trigger the float/autofill. If I shut the valve at the hose bib off, the pool does not fill - so the problem is somewhere with the autofill, right?

Is it possible that when the valve is open, that the water leaks slowly and silently into the pool, thereby gradually filling it up? If so, where I do look for the problem and the fix?

Is this making sense??



LifeTime Supporter
TFP Expert
Platinum Supporter
May 7, 2007
Silver Spring, MD
Fill valves can leak silently. This is difficult to confirm, but the solution is simple, replace the valve.

Another possibility is that the fill valve is being affected by waves, so it fills when in the trough of a wave, and doesn't fill when the water is very calm or at the peak of a wave.