The Sentinel S4- 4 Bar Water Boosting Bundle INSTALLATION & USE The Sentinel bundle consists of a 4-bar pump supplied with fully automatic pump fixed speed controller 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. Ideal for boosting water pressure in large properties with up to 4 bathrooms . Single pumps are designed to boost single water supplies; hot, cold or pre-mixed. Can Provide 30 litres per min at 4 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 mains.Pressure deli