Here is a 35 Gallon water holder tank i would use to hold my RO water, it has a valve already installed and works perfect! Holds 35 gallons. With a WIDE mouth for easy filling. Asking 70 bucks, must pick up! In the Bronx! 32inches L, 18 Inches Tall, 18 inches Wide.
Still Available. Folks this is an Excellent source to hold your RO water for topping off on a weekly basis. That is what i used it for when i had my 75 gallon, would last for about 2 months before i had to make more water.