The DiversiTech® VAX-5 5/16 in. OD extended copper tube is a convenient low-cost port for refrigeration servicing. It can be installed in any position on either high or low side for charging, purging, quick testing, or pressure checking. DiversiTech’s access fittings have 1/4 in. SAE male flare access ports and include a quick seal cap and a stainless and brass special refrigerant valve core.