The APOLLOPRESS® 77WLF-HCA Series press x hose Ball Valve is designed for direct mechanical connection to ASTM B88 Type K, L and M copper tubing in the hard drawn condition for sizes 1/2 to 3/4 in. Valves feature a 3/4 in hose connection with heavy brass cap with heavy duty stainless steel chain to protect the threads. The 77W-HCA is ideal for most plumbing and heating systems. Leak Before Press® feature and 300 psig maximum working pressure.