![plumbing - Why does shutting off cold water valve to the water heater shut down cold water in entire house? - Home Improvement Stack Exchange plumbing - Why does shutting off cold water valve to the water heater shut down cold water in entire house? - Home Improvement Stack Exchange](https://i.stack.imgur.com/0NhGR.jpg)
plumbing - Why does shutting off cold water valve to the water heater shut down cold water in entire house? - Home Improvement Stack Exchange
![MyGuard Automatic Hot Water Heater Shut Off System and Water Leak Alarm and Detector, Quality Design and Material, Easy Installation, Compatible with Most Lever Action Ball Valves - Amazon.com MyGuard Automatic Hot Water Heater Shut Off System and Water Leak Alarm and Detector, Quality Design and Material, Easy Installation, Compatible with Most Lever Action Ball Valves - Amazon.com](https://m.media-amazon.com/images/I/81FByAOtdqL.jpg)
MyGuard Automatic Hot Water Heater Shut Off System and Water Leak Alarm and Detector, Quality Design and Material, Easy Installation, Compatible with Most Lever Action Ball Valves - Amazon.com
![Need help with water heater shut off valves 🙏 Yellow lever is main water, green lever is water shutoff to heater, what is the little silver knob?? Water still coming into heater Need help with water heater shut off valves 🙏 Yellow lever is main water, green lever is water shutoff to heater, what is the little silver knob?? Water still coming into heater](https://i.redd.it/yl3q8hjtl7991.jpg)
Need help with water heater shut off valves 🙏 Yellow lever is main water, green lever is water shutoff to heater, what is the little silver knob?? Water still coming into heater
![plumbing - Why does shutting off cold water valve to the water heater shut down cold water in entire house? - Home Improvement Stack Exchange plumbing - Why does shutting off cold water valve to the water heater shut down cold water in entire house? - Home Improvement Stack Exchange](https://i.stack.imgur.com/5klo9.jpg)