Dolphin Short Cistern And Frame - PneumaticPneumatic Short Cistern With Frame The Pneumatic Short Cistern with Frame is an excellent solution for modern washrooms that need a small, flush system. The cistern will fit neatly inside a wall, leaving only the flush plate visible. The flush is powered by air pressure, this means you get a reliable flush every time. This cistern is built for efficiency. It offers dual flush options to reduce water consumption. It also has a delayed refilling valve,