Adapters don't fit my faucet. Or come with three. None fit. I called Revain to see if they could send me a suitable one. They didn't have it. I got an adapter from a hardware store that fit. After trying this eyewash on two faucets with a new adapter from a hardware store. It did not work. There is electricity without a filter. Water splashes everywhere. After you turn the filters back on, there is no power. I'm talking about the lack of power to be able to use it. I've tried it on bathroom and kitchen sinks. waste of time. sent back. Too bad because I really need it for these pollen eyes.