![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://i.redd.it/6xkt5qdrlls61.jpg)
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
![Midline Valve GUHW-QSW256 Pressure Relief Valve for Tankless Water Heater, Forged Brass, 3/4 in. FIP x MIP : Amazon.co.uk: DIY & Tools Midline Valve GUHW-QSW256 Pressure Relief Valve for Tankless Water Heater, Forged Brass, 3/4 in. FIP x MIP : Amazon.co.uk: DIY & Tools](https://m.media-amazon.com/images/I/71-yrrqpXCL._AC_UF350,350_QL80_.jpg)
Midline Valve GUHW-QSW256 Pressure Relief Valve for Tankless Water Heater, Forged Brass, 3/4 in. FIP x MIP : Amazon.co.uk: DIY & Tools
![HYDRO MASTER Tankless Water Heater Service Valve Kit with Pressure Relief Valve 3/4-Inch IPS Isolator Clean Brass : Amazon.co.uk: DIY & Tools HYDRO MASTER Tankless Water Heater Service Valve Kit with Pressure Relief Valve 3/4-Inch IPS Isolator Clean Brass : Amazon.co.uk: DIY & Tools](https://m.media-amazon.com/images/I/61Scw028lcL._AC_UF894,1000_QL80_.jpg)