![This looks like a pressure relief valve on the cold water line to my water heater. It is leaking outside. I've never seen a relief valve on a cold water line. Why This looks like a pressure relief valve on the cold water line to my water heater. It is leaking outside. I've never seen a relief valve on a cold water line. Why](https://preview.redd.it/6xkt5qdrlls61.jpg?auto=webp&s=a90a1432c82446450262430f38272c9652ffa7e8)
This looks like a pressure relief valve on the cold water line to my water heater. It is leaking outside. I've never seen a relief valve on a cold water line. Why
![Pressure Relief Valve 1/2" 100 PSI for Water Well Pump Pressure Tank Brass NO Lead: Amazon.com: Industrial & Scientific Pressure Relief Valve 1/2" 100 PSI for Water Well Pump Pressure Tank Brass NO Lead: Amazon.com: Industrial & Scientific](https://m.media-amazon.com/images/I/512n-vrfUfL._AC_UF1000,1000_QL80_.jpg)
Pressure Relief Valve 1/2" 100 PSI for Water Well Pump Pressure Tank Brass NO Lead: Amazon.com: Industrial & Scientific
![Mec Part # MEH75/460 - Mec 3/4 In. Mnpt, 460 Psi Set Point Brass Hydrostatic Relief Valve - Propane Tank Valves - Home Depot Pro Mec Part # MEH75/460 - Mec 3/4 In. Mnpt, 460 Psi Set Point Brass Hydrostatic Relief Valve - Propane Tank Valves - Home Depot Pro](https://content.interlinebrands.com/product/Image/Detail/11/290805_usn.jpg)
Mec Part # MEH75/460 - Mec 3/4 In. Mnpt, 460 Psi Set Point Brass Hydrostatic Relief Valve - Propane Tank Valves - Home Depot Pro
![plumbing - Could a pressure relief valve that drains up cause my water heater to explode? - Home Improvement Stack Exchange plumbing - Could a pressure relief valve that drains up cause my water heater to explode? - Home Improvement Stack Exchange](https://i.stack.imgur.com/LG2Ww.png)
plumbing - Could a pressure relief valve that drains up cause my water heater to explode? - Home Improvement Stack Exchange
![Rheem PROTECH 3 1/4 in. Standard Shank Water Heater Temperature and Pressure Relief Valve SP12574 - The Home Depot Rheem PROTECH 3 1/4 in. Standard Shank Water Heater Temperature and Pressure Relief Valve SP12574 - The Home Depot](https://images.thdstatic.com/productImages/fe364caf-1c95-4698-b4bb-86a5338f956a/svn/rheem-protech-water-heater-accessories-sp12574-64_600.jpg)