Tsunami 1/2" Oil Coalescing Filter w/ Float Drain 250 PSI 21999-0131-Z-FDTsunami 1 2" Oil Coalescing Filter w Float Drain 250 PSI 21999 0131 Z FD The Tsunami 50 Series Oil Coalescing Filter delivers high performance air filtration for critical applications, protecting your equipment from damaging oil aerosols and particulates. Engineered with precision and durability in mind, this filter removes oil aerosols down to 0. 001 ppm and particulates down to 0. 01 micron. With its automatic float drain and elevated sump design,