This 15.5 Gallon Stainless Kettle with 1 welded 1/2″ NPT Port is on sale for $99.99. I have this exact keggle from AIH and it works great. I purchased mine back in April of 2011. At that time, there was a limited sale (50 keggles) at $99. The current sale of $99.99 comes within 99 cents of matching the 2011 limited quantity price.
Used 15.5 1-weld Keggle – $99.99
Also: Check out AIH Sale Items – Selection Changes Regularly
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