3/4" Thermostatic valve fed by 3/4 hot and 1/2 cold ?
Posted by Kirk Ellis on May 06, 2002 at 19:51:35:
I'm putting in a whirlpool tub and want to improve the fill rate since it takes 66 gals. Since you use twice and much hot as cold in filling a bath, I'm planning on running a new 3/4" copper hot supply but keeping the existing 1/2" copper cold. I'd run the 3/4 hot right into the valve but use an adapter to fit the 1/2 cold into the valve.

Is the thermostatic mixing valve going to work this way ? I've had different opinions where some people think the valve will not be able to compensate for the different volumes of hot and cold. None of them plumbers, though.