The kinetic energy of the mass of exhaust gas carries it along the exhaust pipe, and causes a pressure build up ahead of the mass of gas and a partial vacuum behind it. This principle is used in a tuned exhaust system.
Culligan - $2352 ($2053 w/o R/O unit) Culligan Gold Series (10), Good Water Machine. If I were to look at price only, I would go with either the cheaper Ecowater system w/R/O at $2698 or the Culligan system. At almost $4k, the Kinetico system seems greatly over priced.
CULLIGAN MARK 100 WATER SOFTENER SERVICE MANUAL. Function of the Culligan Mark 100 water softener. This board has several unique features which allow it to perform a vari-ety of functions. Familiarization of the board is essential for a thorough understanding of the softener.