Yep, that's one reason. And, in general, don't water plants with it either. Also, in houses with soft water, typically the only inside non-soft water supply is

Yep, that's one reason. And, in general, don't water plants with it either. Also, in houses with soft water, typically the only inside non-soft water supply is the cold kitchen tap. Poorly repiped homes skip this step and deliver soft water to all taps, none of which can be used to water plants. Furthermore, in the US, it's foolish to make it a habit to drink or cook with tap water when RO is available. US tap water has never been universally safe and reliable, most of it tastes terrible, and there is no reason to not protect your family and yourself with an insurance policy should there be a water safety problem.