This 8-inch

for outdoor installations

this Apollo Valves 18C-500 series unit should be installed with the 4" probe fully immersed in the hot water within the top 6 inches of the tank

and Payne 09DE series equipment

Multi Products 5927 Actuator 326058-755 This 8-inchThe Multi Products 5927 actuator is a reliable field component designed for precise control in HVAC and combustion systems. Built for consistent torque output and stable positioning, this HVAC actuator integrates seamlessly into damper and valve assemblies where accurate modulation is critical. Contractors rely on this industrial actuator motor for its straightforward installation and dependable response in demanding environments. The 5927 model