I've got plenty of time before we empty the barrel up at O'so, but its never a bad idea to get ready. Following instructions from Vinnie at Russian River, I drilled a 15/16th inch hole at the bottom of the head and plugged it with a standard Belgian cork; the drain port. When Russian River is ready to drain the barrels, they pull the cork and jam a 1" hose into the hole. While I am sure that works fine, I wanted a little easier and more secure way of draining the barrel.
First I got a threaded tapered tap from winetaps.eu that look like this:
The sales rep called the one I wanted a "1/2 inch tap", which is the inside diameter of the tap. The outside diameter of the taper goes from 22mm to 26mm (~7/8" to 1 1/16"). The drain port is 15/16", so it fits perfectly. I tested it out on a scrap piece of wood, and the tap goes in about half way, and with a half turn, the thread lock the tap in place.
The back end of this piece had a BSP threaded connection. Breweries, however, use almost exclusively Tri-Clover connections. I figured it would be nearly impossible to find an adapter, and even if I did find it, I would be left with crevices that could hold unwanted bugs. So, I ordered a 1" Tri-Clover ferrule from brewershardware.com: (note: a 1" Tri-Clover still has the standard 1.5" clamp)
|Threaded Tapered Stainless Steel Barrel Tap with 1.5" Tri-Clover Fitting.|