![This little valve sits on the supply side of my water heater and is constantly running water into the drain of the basement. what is this thing for? Can I cap it This little valve sits on the supply side of my water heater and is constantly running water into the drain of the basement. what is this thing for? Can I cap it](https://preview.redd.it/this-little-valve-sits-on-the-supply-side-of-my-water-v0-sp2ip4gsg0c91.jpg?width=640&crop=smart&auto=webp&s=7723788289ddb2a195a1ae7ce36369b496be426b)
This little valve sits on the supply side of my water heater and is constantly running water into the drain of the basement. what is this thing for? Can I cap it
![Customer has a 40 gallon water heater that constantly runs out of hot water. They opted for a mixing valve instead of a larger unit. : r/Plumbing Customer has a 40 gallon water heater that constantly runs out of hot water. They opted for a mixing valve instead of a larger unit. : r/Plumbing](https://i.redd.it/6zyjf5qsamw71.jpg)
Customer has a 40 gallon water heater that constantly runs out of hot water. They opted for a mixing valve instead of a larger unit. : r/Plumbing
![Should My Hot Water Heater Tank Be Running All The Time? | Denver Plumber Blog | Quality First Service Group Should My Hot Water Heater Tank Be Running All The Time? | Denver Plumber Blog | Quality First Service Group](https://www.plumbinghelptoday.com/wp-content/uploads/should-my-hot-water-heater-tank-be-running-all-the-time_61143a30a3f6b.jpeg)