Jadnashua
Retired Defense Industry Engineer xxx
The magic here is you must tighten the nuts evenly, and only just until things touch (or a hair less). It also helps if you hold the tank straight while tightening so the gap to each point stays the same as much as possible - starting out crooked can be problematic. Porcelain has no spring, and if you try to go beyond touching, you can crack things. There's a very slight amount of give because of the rubber washer, but not much!
Because I don't do it often, I'll use thick strips of paper between the contact points (say 24# copy paper), and stop when I start to feel friction when trying to pull it out. This means there's all of a few thousands of an inch clearance, and I've not gone too far.
Because I don't do it often, I'll use thick strips of paper between the contact points (say 24# copy paper), and stop when I start to feel friction when trying to pull it out. This means there's all of a few thousands of an inch clearance, and I've not gone too far.