Try an Auto-Siphon Clamp with your 1/2" auto-siphon. This handy clamp holds a 1/2" diameter auto-siphon in place above sediment. The clamp keeps the tip of your auto-siphon off of the sediment later, which keeps sediment out of your secondary fermenter or bottles. This 1/2" Auto-Siphon Clamp is perfect for holding your 1/2" auto-siphon in an upright position in wide-mouth vessels, like a bucket or carboy, when racking. Compatible with 1/2" large auto-siphons only. NOT compatible with mini auto-siphons or large auto-siphons.