Predecessors to HWT-F1000S under-sink instant hot water heater did not last. I am on third unit across ten years; worse yet, I procrastinated three years replacing the first and second units. That means I have had access to this product only four of the ten years.

I am on the City of Virginia Beach, Virginia, water system. I have maintained two swimming pools and three hot-tubs for a dozen year here, some I am most familiar with the quality of the water and know it to be excellent with respect to hardness, pH and alkalinity

I replaced second unit with Insinkerator brand because I did not want to mess with changing faucet required with a new brand.