... which contaminates expensive refrigerants2 Larger ID reduces vacuum time substantially cover 1/4'' or 3/8'' hose, allows techs to pull a ... hose, W.P./B.P.: 600psi-3000psi is available2 For 3/8'', 1/2'', 5/8'' charging hose, W.P./B ... For vacuum hose, 36'' hose will pull to 25 Microns and lower, hoses longer than 8’ not recommended for evacuation 3/16' SAEJ2196 ...