Does anyone know where and what model I can locate a lp gas valve for a direct vent Vermont casting stardance dv 25 (installed new in my home 12/98). Not sure if the gas valve is weak or not. I have a good pilot flame, but burners do not always come on. Purchased new thermopile and thermocouple (not installed yet; waiting for parts). Talked to service repair man who once replaced a thermocouple on this unit a couple of years back. He indicated it may be low pressure to the valve or a bad valve if replacement of the thermocouple and thermopile do not resolve the Issue. I looked on line and I am confused on which replacement lp gas valve to purchase if that is the issue. Any help would be appreciated.