I copied advice I found on this site.
I used black pipe nipples, .75 inch I think, in holes cut with hole-saw.
The pipe just screws into the hole but I anchored and sealed with conduit washers, after I burned the galvanizing away with torch, which was likely not necessary.
Black pipe nipple caps cover three of them, the valve takes care of the one.
The valve takes care of the one that comes up to waste level with copper pipe, which is just pushed together, anchored to side with strap and couple small SS bolts.
One covered nibble is barely visible in pic.
I might add that I am glad I used smaller drum. I only smoke for two, but if need arises, I use both grates.
The hole for the chimney was a PIA to cut...took 10 minutes, but that top was a lucky stroke of luck...thermometer probe is near perfect position when installed and squatchin' going, as in second pic from last April...
The SS chimney is near exactly the diameter needed to maintain flow with its area matching the sum of the vents...or close enough it does the job, no creosote smoke after it gets going.
Rarely mess with it once it gets to temp, save messing with valve once in awhile. Usually end up with two vents open, bottom opposite and some degree of valve opened.
Better many vents to begin and later shut, to me.
The chimney may be from Char Broil...forgot, some brand of burner...will send if you call.
. The next day was time to get everything hooked up for a good seasoning. I havn't made my basket yet (got the expanded metal today) so I used the basket from my turkey fryer for the break-in. After wiping the inside clean of the previous oil slick, I reapplied a liberal coating and fired off 10lbs of lump carcoal with some hickory chips for good measure! I put flame to coals at 6pm and the UDS climbed to 300 for about 1hr. I chocked off all the O2 for about 5 minutes and the temp slowly dropped down to 230 when I bagan to crack open some valves to revive things a bit. The drum krept back up to about 250 where it stayed for another 3hrs. I played with the valves a bit and was able to get it to stabalize at 230deg where it stayed until I crashed out at 4am the next morning. So in closing, I know the UDS will hold a temp (a little higher than I was hoping) for at least 10 hrs. I hope to put some dead animal products on it this weekend once I get the basket finished. I will use briquets this next time as I understand they burn a little cooler than the lump. It's my hope that with meat on the grill and cooler burning briquets, I can get it to run in the 215-225deg range. The last picture is taken with a nice bronze smoke patina on the guts of the UDS.... I can't wait to see how she cooks this weekend.
