Dolphin Blue Short Cistern - PneumaticPneumatic Short Cistern The Dolphin Blue Pneumatic Short Cistern is a discreet and efficient solution for modern washrooms. This cistern fits inside the wall, leaving only the flush plate visible. It works with toilets that are floor mounted and uses pneumatic technology to provide a powerful flush. This cistern is designed to save water. With dual flush options and a delayed refill valve that can save up to 9 liters of water everyday. The compact