Global Water Solutions PressureWave Series 2 Litre Inline Pressure Vessel INSTALLATION & USE 2 Litre Pressure Vessel for use with Pressure Boosting Sets mainly for Domestic Pressure Boosting and Light Commercial UseInline 'Hydrosphere' tanks mount directly on to the pipework.The PressureWavePressure Vessel Series is constructed of a virgin polypropylene liner combined with an FDA approved high grade butyl diaphragm. This is held against the wall of the tank with a steel clench ring. The brass air valve, sealed by a threaded o-ring valve cap, prevents air leaks. 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. The water connection uniquely provides a dual water/air seal ensuring a complete leak free and maintenance free pressure vessel.On the exterior,