sorry. I meant to post this on the 5th wheel forum. No need now. Thank you guys for the info, and advice. I have to replace the present toilet because the previous owner got dirt in the water line. Ruining the ball, and seal to the bowel. I could fix it. But that requires taking the whole thing apart. Replacing toilet would be easier,and more pleasant. I am surprised that the Sales Associate for Parts Dep wouldn't know more about what she is selling. Won't be going there for tech info. I bought the toilet today. I went with elec push button. Because of very, very small room my toilet is in. Reaching a petal at the bottom of the bowel on the outside wall side. Is a challenge. Thank you guys for your help.