This is a device that attaches to a faucet and provides hot water instantly. It seems to be compatible with almost all faucets, but there might be some exceptions. I don't know the specifics. I installed it once, tested the power and water flow, and used it. However, I gave up because the faucet on my house is positioned too low, and there wasn't enough space to use it. It's convenient because it provides hot water instantly where there wasn't any before. It's used, and I don't know about compatibility, so please consider purchasing at your own risk. It is not a water purifier. Winter, cold weather measures, cold wave, midwinter