A bucket feed through for water outlet can be made using a barbed hose fitting with pipe threads or a needle valve. See example at right and below. Metal washers are used on both sides of the bucket. A coupling or another pipe fitting is used on the other side to tighten the washers down on the bucket side wall. Silicon rubber type II is used to seal the connection. Amazingly enough standard washer sizes work fine. For example for .25 pipe thread one uses two .5 metal washers.
Offered by Mike.