Lochinvar & A.O. Smith 100113148 Assembly 318973 401 making it suitable for modern making it suitable for modern high efficiency units The Bradford White 265 43232 00 Flame Sensor is a critical safety component designed for precise flame rectification in residential atmospheric and power vented water heaters this assembly integrates a precision gas regulator with a high performance venturi mixer to maintain the optimal air to fuel ratio required for stable ignition and peak thermal output this complete valve and venturi assembly is factory sealed and bench tested to ensure the gasket integrity and flow rates are perfectly matched