That's the way I'd do it...hot in the bottom and cold out the top. Location of the valve really doesn't matter, as soon as it's closed the loop is deadheaded and all flow is stopped and no heat will be transferred.
Mike B
Mike Boteler
1956 Chevy 3100 Resto Rod 1952 Willys M38 Army Jeep 1983 Jeep CJ7 Laredo 1984 Jeep CJ7 +++++ Silver Spring, MD
