Auto-Siphons are a great way to transfer fluid between vessels much easier and faster than by hand. Fermtech's "Large/Fast Flow" Auto-Siphon. Fits 5 gallon buckets and carboys, and connects to a siphon hose 7/16" (11mm) bore. Simple five step instructions for use. Maximum allowed temperature of 120 degrees Fahrenheit, or 49 degrees Celsius.