Economy Self-Contained Deluxe QS Water System w/750 ml Bottle and Extra Bottle Deluxe models have a selector toggle allowing you to switch between city & bottled water 750 ml & 2 liter heavy duty bottles available Comes with patented quick-switch system for water bottles Gauge 7260 shows bottle pressure Bracket mounts to any flat vertical surface Optional post-mount available On/off toggle releases bottle pressure