I am in the middle of a complete bathroom redo. New tub, new sink, new toilet, new vanity, and new faucets. I have purchase a shower/tub faucet with three handles for a period look. There is no "anti-scald" or "balanced pressure" valve. According to several sales experts, you only need them for a single handled valve. (True or false?)
Anyways, my question: is it better to increase the water supply lines from 1/2" diameter to 3/4" diameter as a solution to a scalding issue? The scalding issue is when someone flushes the toilet or the washing machine is filling and someone else is in the shower, they get burned.
Note, I can only increase the supply lines in the basement and not on any vertical lines to the second floor. Will this help?
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