The C. Dudley Pratt Aquatic Center, at the ground level of Hemmeter Fieldhouse, is comprised of the Elizabeth P. Waterhouse Memorial Pool and the facilities that support the Punahou swimming program including the Harry Steiner Pool Office.
With a depth of at least 9 feet for its entire length, the Olympic-sized 50 meter by 25 yard Waterhouse Pool is the largest of any school in the state of Hawai‘i (including the University of Hawai‘i), at more than a million gallons.