The Twin Sentinel S2- 2 Bar Water Boosting Bundle INSTALLATION & USE The Twin Sentinel bundle consists of a pair of 2-bar pumps supplied with two fully automatic fixed speed pump controllers with 0.4l potable expansion vessel. The Sentinel is suitable for a number of house water boosting applications and is specifically designed as a solution to low water pressure and flow. The pump is efficient and extremely quiet in operation. Twin pumps are designed to boost both hot and cold water supplies equally. Ideal for boosting water pressure in small properties with up to 2 bathrooms . Can Provide 30 litres per min at 2 bar. The Sentinel must be used in combination with a break tank or header tank. This will give your pump a reservoir of water to draw from. If you do not have a break or header tank, you may need to consider our All-In-One Solution water booster that comes complete with a water tank.Unless otherwise specified pumps are not allowed to be connected directly to the public m