I am using this as a pressure tank for curing epoxy bowls. I use 50psi of pressure to remove bubbles that often develop in deep castings of epoxy. It works well. It is solidly built and has always held pressure which is important to me. I have modified the inside and outside to remove the paint tube and have added a fitting which easily allows me to add pressure with a tire compressor. Solid, well built, holds pressure for many hours.