This Size 4 high strength cast iron spacer flange is engineered for the Sure-Flex Plus series

as an authorized JCI part

If you notice the main valve failing to open or erratic fluctuating downstream pressure

Engineered specifically for Wayne FH oil burners and compatible with firing rates from 4 to 13 GPH

Automation Components Inc (ACI) A/20K-D4-PB Thermistor 326058-758 This Size 4 high strengthThe Automation Components Inc (ACI) A 20K D4 PB Thermistor is a high precision duct temperature sensor engineered for HVAC Building Automation and light industrial systems. This model features a 4 inch 304 stainless steel probe and a 20K Ohm NTC sensing element, providing an accuracy of + 0. 36F (0. 2C). Designed for rapid installation, the unit includes a flame retardant ABS plastic box enclosure with a built in mounting flange and a foam vibration