Abstract: A condensate return tank for storing and condensing water in a closed loop steam system is provided having a generally cylindrical body closed at each end and a float valve comprising a ball attached at one end to a lever arm which is itself attached at its other end to a pivotal fitting secured to the inner surface of the tank. The tank is arranged, and an opening is provided on the surface of the horizontally disposed tank, adjacent one end and spaced therefrom by a distance permitting manual entry into the tank. The float valve is mounted on the inner surface of the end so as to be accessible from the opening. A cap rests on and closes the opening.