the Marley 302012808 is the standard replacement part

What is the difference between the P72 and P70 series

preventing over-feeding or starving the evaporator

ensuring consistent wall thickness and internal diameters for a perfect solder joint every time

Lochinvar & A.O. Smith 100326994 Switch R-407A the Marley 302012808 is theThe Lochinvar & A. O. Smith 100326994 is a professional grade L290F manual reset thermal switch designed for critical high limit safety applications in commercial and residential water heaters. As a direct replacement for legacy part 100167474, this manual reset limit switch ensures the burner circuit is interrupted if internal temperatures exceed the 290 degree Fahrenheit threshold. This component is essential for preventing hazardous overheating