landarc
somebody shut me the fark up.
I have three 3/4 inch vents, they are the size you want. They work great and I can get more heat if I want it.
Did you use close nipples? Had the same problem cause I bought the wrong ones... But I would go to 3/4in with a 1in hole...
Yes... . When I was building mine, I was dry fitting the parts and the nut would only go so far onto he nipple. There are ones out there that are tapered larger toward the middle and the nut will not screw on. After a quick look at the directions I found on here. They def say close one...Is there another kind of nipple other than a close nipple?
Bigger the better, I have four 1" open holes on my UDS, and use fridge magnets to close them down when needed. You can always close off the intakes, but if they are too small, you can't do much to hit higher temps when you need to.
To be crystal clear.. pipe nipples aren't needed to make a functional UDS. They are a luxury.
just put a lock nut on both sides. it dose not need to screw fit the hole.