that 18" high for the exterior dimension, is that to the top of the lid or the top of the tub? I'm trying to figure out if this thing will slide under the ball valve on my keggle when the coolers lid is open...# Exterior dimensions:29"L x 14W" x 18H"
# Interior dimensions:23.5"L x 9.5"W x 13.5"H
Now I don't have to worry about it... This one is plenty big for anything I need to brew..go big, I started with a smaller tun. paperweight now.