Take a look inside of our Sesto MM1F 3-Way Ball Valve! There are two key features to note about the Class 150 Multiport here. First, have a look at the sealing surfaces on the top. Deep grooves and thick gaskets make the “torturous path” more difficult for media to escape. In the 3-Way Flanged market this is not very common. Secondly, our valve is a 4 seat design. This means any side can be an inlet/outlet, but it also means the ball will not float freely on the blind end. It will have consistent pressure on all 4 sides. This reduces several risk factors for leaking and extrusion.