Residential RO Components5.5G Storage TankContact Us to PurchaseFeatures Patented stainless steel connection. Smooth internal construction prevents diaphragm abrasion damage. CE approved. NSF certificated. Specification Model Type Spec Connection TA-0093 Metal tank, blue 5.5G (21L) 1/4” TA-0087 Metal tank, white 5.5G (21L) 1/4” Note Maximum working pressure: 100PSI Maximum temperature: 40℃ / 104℉