VACUUM/PRESSURE PUMP Gomcos® vacuum/pressure pump provide both suction and pressure capabilities that may be independently adjusted. Model 309 utilizes Gomco's bacteria filter to help prevent aerosol and aqueous fluid contamination. MODEL 309 This unit is designed specifically for ENT treatment. Only 12" high, the unit occupies less than one square foot of space. The diaphragm compressor is designed to provide 0-22" Hg vacuum and 0-50 psi of pressure. Model 309 is equipped with gauge, regulating valve, graduated 600 ml glass collection bottle or 1100 ml disposable canister, disposable suction tubing, reinforced spray tube, bacterial filter to help prevent fluid and aerosol contamination and a hospital grade plug. Model 309 is UL listed.