You mean 35gpd which I believe is 35 gallons per day. It also depends on the pressure of your water going through the unit. i had a problem producing much water at first until I read that the pressure of my holding tank had to be set at a certain psi. Once I fixed that, i didn't have any problems. Now this holding tank looked like a propane tank. Not sure if that is what you mean when you say holding tank or if you are talking about the bucket that you are having your water go to.