http://www.tahydronics.com/de/produkte-losungen/Pressurisation-and-Water-quality/Druckhaltung/Druckausdehnungsgefasse-mit-fester-Gasfullung/Statico/
http://www.youtube.com/watch?v=kEaVWtZnHxI&feature=player_embedded
http://www.youtube.com/watch?v=kEaVWtZnHxI&feature=player_detailpage http://www.flamcogroup.com/files/animation/T-Plus-CH-D.mpg
