A: Yes. There is a monitoring manometer and an atmospheric manometer. Manometer = Fluid Reservoir. All accessories for the continuous monitoring and testing are installed. All Bravo DoubleWall sumps ship under a continuous 20″ Hg vacuum test. The larger of the two is used for visual inspection of fluid level and is the unit that a float-style electronic level sensor is installed in, when required. The atmospheric manometer is used to help balance the fluid level within the sump.