One of the most essential pieces of equipment in a homebrewer's arsenal is an auto-siphon. Besting the alternative methods, like sucking on a rubber tube, the auto-siphon allows you to transfer your homebrew from one vessel to another with limited oxygen exposure. In this article we cover how to use an auto-siphon, and how to maintain it.
There are 4 components to most auto-siphons, which are all removable from each other to allow for easy cleaning and sanitizing.
Tube: This is the large tube which contains the smaller racking cane. On the end of this tube is a fork with a valve attached to the bottom. This valve is more or less a one way valve, which helps create the vacuum needed to start the siphoning process. It can leak when holding fluid without the racking cane attached.
Sediment Blocking Tip: This is the small black cap that attaches to the bottom of the tube, its job is to aid in preventing sediment flow during the racking process. Although the sediment blocking tip does perform its job well it does not assure that all sediment will be blocked especially if it is submerged in the trub at the bottom of your fermentor.
Racking Cane: This is the smaller tube made of hard plastic that has a 90 degree bend on one end, and a plunger on the other. The straight end with the plunger goes into the tube, and provides a seal to block air flow which in return creates a vacuum inside the auto-siphon.
Siphon Tubing: This is flexible tubing that attaches to the bent end of the racking cane. Your home brew will flow up the racking cane and down the tubing into your new fermentor, or bottles. Siphon tubing isn't typically included in the purchase of an auto-siphon, but can be bought separately at most hardware stores. Having 5-7 feet of this tubing is optimal.
Taking the auto-siphon apart and including it in your cleaning / sanitizing regiment is extremely important, and cleaning the auto-siphon directly after each use is suggested. While the plastic on the racking cane is durable, precaution should still be taken because if excessive force is used it will break. Also to keep in mind, siphon tubing should be replaced when it starts to become stained or dirty. Tubing is inexpensive and will help avoid infections when replaced in a timely manner.
Auto-siphons are a great tool to have and will substantially increase your beer quality by reducing excessive oxygenation after fermentation.
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