About this item Metal pressurized tank with up to 3. 2 gallon holding capacity Made from food grade butyl diaphragm with post-cure procedures provides a tasteless and odorless water chamber. Tested by independent third-party to meet NSF/ANSI Standard Stainless steel 1/4" NPT valve thread, 1/4-inch tank valve Included Discharges effectively in both vertical and horizontal position Pre-pressurized between 7-10 psi for common use Brand:iSpring Special Feature:NSF certified Product Dimensions:11"L x 11"W x 14"H Package Information:Bottle Installation Type:Under Sink Item Weight:8 Pounds Model Name:Pressurized Water Storage Tank UPC:662425023684 : : Material:Stainless Steel Capacity:4 Gallons Included Components:tank Purification Method:Reverse Osmosis