Patent pending IBVF flanged adaptors have been developed to address several age-old problems in the marine industry. Here's what they do:
Eliminate common (and dangerous) thread mis-match when in-line valves are screwed onto thru hulls (see image below).
Accept standard thru-hulls into the base and standard in-line valves or other components on top.
Provide a safe and sturdy assembly when in-line valves are used as seacocks.
Prevent valve damage during engine or generator installation - the valve can be installed later.
Make future valve replacement a simple job.