I also have been looking into making my own with mix and match components.

you’re either referring to the law (in Washington State, anyway) regarding rental properties, or you live in some place that has uber nanny legislators. And seriously? YOU don’t think YOU are smart enough to know what temperature YOU want YOUR hot water in your home? Any who, I don’t want the dishwasher to turn the electrical heating element on. Electricity (unless your using magnetic induction) is an inefficient way to heat water. It is better for my house to use hot water from my tankless HWH. I have a tankless HWH that will produce 190° hot water if I set it correctly. I have a dedicated line from the manifold that natal led between the heater and the Case Acme temperature regulator. I send 160° water to my dishwasher, and washing machine. (I also have a dedicated line that supplies 160° to a separate faucet on my sink that takes the place of the under sink contraption that crapped out a while back. (120° is the legal limit? Don’t tell InSinkerator. I doubt those gadgets they make can even go down to 120°.) I would use 180° water but I am afraid the water temperature alone might melt some plastic ware and also damage some synthetic fabrics. Here’s a thought, when it comes to how YOU choose to live in YOUR house, man up, and grow a pair.

We have a H&C drinking water faucet at a corner of a sink. The under the counter filter provides water to the cold water faucet as well as the under the sink instant hot water heater. Neither takes up much space in the sink base. We love our instant hot!

I think pot fillers are the silliest things ever . I don’t mind carrying a pot of cold water to my stove but when the powers that be come up with a way of dumping the boiling water to drain whatever on the stove give me a call. They rarely even use these in restaurants where they have pots probably 3x the size of yours. I like thehot water dispensers but honestly a kettle takes no time to boil and I love my filtered water dispenser.