Handy bottle filler for wine and beer bottles . 

Can be fitted on fermenter taps.

Simply push down on the bottom of the bottle to start the flow, and when you lift the filler up the flow automatically stops.

Because this filler has a spring you always have to push down to operate.

Bottle Fillers without the spring will continue to flow without holding the filler down so you are hands free to put on a cap while the bottle fills. 

This bottle filler is advertised on some web sites as 'pro bottle filler'