90004-7 Control, 7000 MLC – A270 Posted on February 21, 2017 /Under Sunglo Parts Main control valve for Sunglo A270 heater for propane gas. This valve is unregulated and must be used with a 11″ water column regulator on the propane tank. Replaces Item No. 90004-6 Warning: Always check for leaks using a soapy water solution. For professional installers only