In general , stool outlet diameter is 110 , but some of the old building is a size 75. My question to you this , no other N-type responses. 1 , based on increased in the past, besides a straight adjustable , so that after installation in the stool higher than ever , the increase of height is adjustable by increasing the height. 2 interception below, if you take iron pipe to add a sleeve , a setting directly above another, and then ended after the original height and, as such devices installed in the stool higher than ever , so many problems . Recommendation : the case of operations experts, or the second series of programs , have no fear as long as plumbing leaks , adjustable socket joints or get the original water is usually no problem. Dude, do not talk about "leakage" pale , well ! I do not understand the conversation later! Bye!