125-inch spark gap design between the high-voltage rod tip and the burner ground

Watch for loud grinding or screeching noises (bearing wear)

Using an unverified substitute can lead to premature tripping or failure to protect the heat exchanger

and 20434202

this valve utilizes an equal percentage flow characteristic to provide stable modulating control in water or glycol systems

Mueller A17936 Check Valve 320819-301 125-inch spark gap design betweenThe Mueller A17936 is a professional grade 1 2" Magnetic Check Valve engineered for heavy duty refrigeration and air conditioning systems. Featuring a hermetically formed solid copper body, this valve ensures zero leak potential while maintaining structural integrity under high pressure conditions. Unlike traditional spring loaded variants, its magnetic closure mechanism provides a more positive seal with a significantly lower pressure drop, making it