Caleffi 553549A AutoFill Automatic Boiler Fill Valve， Pressure Indicator， 1/2-Inch Sweat Inlet by 1/2-Inch<div style="text-align: left;"><strong>[Product Information]</strong><br><ul><li>Maintain Pressure at Stable Value</li><li>Water will stop at set pressure</li><li>Connection Type: Sweat</li><li>Connection Size: 0.5-Inch</li></ul></div><img src="http://ecx.images-amazon.com/images/I/41xK7eQNL0L.jpg" noproxy>