There’s going to be valve under the sink. Close it More on reddit.com

I'd point you to r/PlumbingRepair and r/Plumbing . In the appliance industry, faucets don't exactly fall in our expertise. More on reddit.com

Here's my Moen touch-less Faucet review that Amazon refuses to publish I have had this faucet installed for about 6 months now with the voice activated module. I have updated the review with feedback I received from Moen Customer Support at the bottom, which honestly is not much help, they acknowledged the issues had no resolutions to offer. Pros: Very sturdy, looks great in my kitchen Touchless is a very nice feature, keeps the faucet from getting dirty The voice activated feature, when working, is actually accurate - i.e. "Alexa tell Moen faucet to dispense 1 tablespoon of water", "Alexa tell Moen faucet to dispense 4 cups of water", etc.. Cons: The faucet randomly turns itself on and water starts running when no one is in the kitchen. We think changes in sunlight are triggering this since our faucet is installed in front of a window. There doesn't seem to be any way to easily temporarily disable the motion sensor which is located on top of the faucet. The only solution I have found is to crawl under the sink and unplug the sensor. If the sensor is unplugged then you can't operate the faucet manually. When our power went out for a week during storms this summer, we did not initially have backup batteries installed, and we couldn't use the faucet at all until one of our neighbors loaned us batteries. If you unplug the faucet to keep it from randomly turning itself on, you have to crawl back under the sink to plug it back in. The water flow is strong and very strong. I have been thru all the adjustment/calibration options on the faucet and there doesn't seem to be anyway possible, either when operating the faucet manually or when voice operated, to allow the water to trickle and also to have a strong flow. You can trickle water if you turn the water valve under your sink to be only partially open, but then you won't be able to get a strong flow when you want it. Response from Moen: At this time there is no feature to be able to disable the sensor in the Moen app for your smart faucet. Also while the flow control feature in the app is unable to do a trickle you can do that by using the faucet handle (THIS DOES NOT WORK). As for the sensor being affected by the light coming in from the window maybe a curtain would be helpful if it is that close to the window. More on reddit.com

Um… if you want to use the faucet with the handle, use the motion detect to turn the water on, then control with the handle after that. It’s not magic, it’s just a solenoid that allows water to pass in one state, and doesn’t allow water to pass in a different state. Edit: record scratch… with the handle in the off position, there shouldn’t be any water coming out. Ok I’m confused. What does the underside look like? More on reddit.com