N301B and N302B ? 30 gallon vacuum generating heads by Nortech to fit existing 30 gallon drums. Units are fitted with efficient vacuum venturis that operate off 3/4" air lines and generate high vacuum lift. Units consume 68 SCFM at 100 PSI and produce 185" waterlift. Vacuum suction is 89 SCFM. Optional items available include a liquid shut-off assembly for wet-dry applications, a 99.97% HEPA filter and an exhaust housing silencer to reduce dBa. Pictured here is the single venturi, N301B and the N302B dual venturi option is also available. Please contact us if a vacuum product of this nature is of interest and we can quote the vacuum lid assembly best suited to your application.