• Reverse Osmosis Tank: Made from 100% food grade materials, this RO water tank stores and keeps your water free from any contaminants and harsh chemicals. The perfect addition to any RO water system. • Easy to Install Water Tank: RO tank replacements easy set-up • Durable Water Storage Tank: This RO water tank is rigorously tested for quality and durability and includes a 1-year warranty. • High Quality Water Tank: This water storage tank is made from durable deep-drawn steel domes with precision welding to ensure long lasting value for your RO water system. • Water Tank Dimensions: This large capacity water tank is 38 x 18 x 18 stores up to 22 gallons of water for on-demand filtered drinking water. Heavy Duty Construction -All Materials in the expansion tank are 100% food safe and FDA grade to make sure your water is tasteless, odorless, and contaminant free. -The inside of the RO water tank is completely smooth to prevent damage to the bladder. -The water storage tank is coated with a two-part epoxy primer and finished with polyurethane to resist damage even in the outdoors. -The adjustable bladder within the water tank is made of high grade Chlorobutyl rubber and is completely airtight. -The inside liner of the water filter tank is made of Virgin Polypropylene, the most durable liner even on a molecular level. All the Water You Need A 40-gallon water pressure tank can hold 22 gallons of water. All tanks have a certain amount of their capacity used by the air bladder, which is necessary for drawing water from the water reservoir tank. Be Confident All components are high quality food-grade. -Each RO tank passes extensive durability testing. -A sealed brass air nozzle and o-ring sealed air valve caps means consistent air pressure. -This reverse osmosis tank is designed to last over five years.