Vent limiters are designed for indoor use

Vibration Isolation: High-density material reduces mechanical vibration

and the necessary technical conversion labels required for a code-compliant installation by a licensed HVAC technician

This part is the standard inlet elbow for several Bloomfield units

4 inches water column is a critical threshold

Hydrolevel 1100H5 Low Water Cut-Off 321042-401 Vent limiters are designed forThe Hydrolevel 1100H5 is a 24VAC low water cut off (LWCO) engineered specifically for high efficiency residential boilers. This compact probe type control utilizes Hydrolevel CycleGard technology to periodically shut down the burner, allowing the water level to stabilize for accurate sensing without nuisance tripping. It features an automatic reset function and an integrated burner circuit test button for rapid diagnostic verification during