would like to put a Y valve in the raw water cooling line so I dont
have to yank it off the seacock next year during flushing and
winterizing.

the only Y valves i see are for marine heads BUT....i'm an engineer
and NEVER use something for a critical application that's not rated
for that application

anyone have any recommendations about a Y valve for the sal****er side
of the cooling system so i can switch between the seacock and a bucket
for flushing?