What can I do to prevent scalding while taking a shower, or losing water pressure, when another appliance is running. Such as; dishwasher, washing machine, kit sink, toilet, etc... This project is going to be for a house not built yet. I want to avoid the whole thing and get all the plumbing in before it's too late. I am tired of telling everyone not to use the water when someone is taking a shower. The cold or hot I can handle, the loss of water pressure is what kills me.