Foam Makers are in-line fixed foam aspirating devices. They are used in low expansion foam discharge applications to protect tank farm dikes and other low-level discharge applications. Foam Makers are used in the dike foam delivery system as referred to in design standards such as NFPA 11. The foam makers are part of a low-level foam delivery system that also incorporates foam storage bladder tanks, proportioning devices and suitable foam concentrates. Foam solution can also be supplied by foam pumping systems or in semi-fixed systems supplied from a portable supply such as a fire brigade appliance.