PressureWave GWS 80 litre expansion vessel for pwb-80lv autoclave80 LITERS EXPANSION TANK ATT. 1 W FIXED MEMBRANE The PressureWave PWB 80LV tank from Global Water Solutions is ideal for a wide range of applications including pressurization systems, artesian wells, irrigation systems, constant pressure systems, variable frequency electronic systems, thermal expansion, water hammer protection. The PressureWave PWB 80LV Series is constructed from an original polypropylene liner combined with a high quality FDA (Food