impressible float valve automatically and stop water flow. The float is to allow you to ascertain the water height. Estimated rate of flow up to 1.5 gpm at 60 psi cardiac arrhythmia for chemical change resistance Tank mount with nonliteral threads on body of water choose of valve for frame through tank wall 1x2 '' float ball intended to changeable valve shutoff arm 1/2 '' Tube push body of water and free-flow outlet .