when used with the NXF4000

By utilizing this HVAC gas supply line

providing an essential safety barrier against "dry fire" conditions

For technicians troubleshooting furnace short cycling or open-limit error codes

Built with a durable black silicone jacket

Hydrolevel 1100 Low Water Cut-Off 320788-704 when used with the NXF4000The Hydrolevel 1100 (Part Number 45 1100) is a 24Vac compact low water cut off engineered specifically for residential boiler protection in space constrained installations. This probe type LWCO utilizes advanced electronic water level sensing to protect hydronic systems from dry fire conditions. Featuring an automatic reset function, it restores the burner circuit once a safe water level is detected. The control includes a dedicated burner circuit