The Mod. MLP is a Venturi type line mixer that works on the basis of the negative pressure generated when water passes through different piping sections. When in operation the MLP proportioner inducts foam concentrate from an atmospheric storage tank and injects it into the water stream, providing a 1%, 3% or 6% foam solution. The Mod. MLP is manufactured in bronze with a metering and shut off valve that allows foam induction to be regulated and stopped. Lightweight and flexible, it can be installed on portable foam equipment or in small fixed applications with fixed flow rate.