Wates 300 Liters Pressure Vessel(16 bar) is ideally suited for a wide range of applications, including booster systems, thermal expansion, irrigation systems, and hydraulic hammer arresting. Wates Pressure Wave tanks are constructed of a virgin polypropylene liner combined with an FDA-approved high-grade butyl diaphragm. Water enters the tank through a patented stainless steel water connection. The diaphragm and liner are both reinforced in specific wear areas for longer life. All internal parts including the air valve are rounded to prevent piercing of the diaphragm in extreme conditions.