The DiversiTech® VC-4 flare cap is a quick seal cap for 1/4" flare connections, and 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.