0820635 is a SIT 820 Nova Natural Gas Valve Model 0820635 for use with a Millivolt system only Empire, Superior, Lennox, IHP, Comfort Glow, FMI, Desa, Monessen, Majestic, Sure Fire, Cozy heat and others.

This a SIT Controls Series 820 Nova Millivolt gas valve model number 0.820.635 or 0820635 and is a new gas control with a factory warranty.

The 0820635 SIT 820 Nova mV Natural Gas Valves for use with a Millivolt system using a standing pilot.