Title does not say it all. What do you mean? Are you getting spillover, from water levels that are too high? Are you wondering about storing bongs or ashcatchers with the water still in them? Explain please.
use an ashcatcher that accounts for spillover by having either a splashguard, large can, or second splash chamber. or just use absolute minimalist water levels and take it easy while clearing/take the ashcatcher off while clearing.