Speedy Jim wrote:

Anti-scald is part of the shower/tub control (faucet).
It prevents water that is too hot from reaching user.

Another similar device is "pressure balance"
(also built into faucet/control) which maintains
set ratio of Hot/Cold flow even if pressure
drops when someone flushes toilet, for example.

See if Delta site has more explanation:
http://deltacom.deltafaucet.com/wps/portal
Jim

Thank you, I might check that out.

I've been reading up, looks like the hot and cold do get mixed
in the faucet, I see that anti-scald device really has a seperate
function.

Barry