The 77707-0202 is the Sta-Rite flameholder kit for the 200,000 BTU heater size, a component of the gas heater burner system.
What the flameholder does
Gas heaters do not simply light a flame and hope. The flameholder anchors combustion where the design puts it, holding the flame stable and spread evenly under the heat exchanger. That geometry is what makes the heater burn cleanly, transfer heat efficiently and stay within its safety limits.
Why it fails and what it looks like
Flameholders sit directly in the fire and eventually distort, corrode or burn through. The symptoms are combustion symptoms: a flame that lifts away or burns yellow and ragged, soot building up in the burner tray, heat that does not come the way it used to, and safety switches tripping soon after the heater fires.
Before you order
Match the BTU size on your heater data plate, because burner components are sized to the input rating. Fitting this is gas appliance work, so plan on a licensed technician to install it and confirm combustion afterward.
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