Fill in less than an hour (depending on water flow g.p.m.) Dunk Tanks are great. Their favorite person is just sitting there waiting to be dunked as they launch the ball at the target. A hit and a splash or a miss and a boo! People love dunk tanks and is safe and fun for everyone! Great for school functions, church fundraisers or that family reunion. Trailer mounted and easy to set up and use. Please call our rental department and reserve now!