AIR CONTROL PRESSURE TUBE

🔧 What it does

The tube allows the appliance to:

• Detect airflow
• Verify inducer/blower operation
• Monitor combustion pressure
• Confirm venting is working correctly

It connects between:

• a pressure tap/port on the equipment
• and a pressure switch or sensor

🏠 Where it’s commonly used

• Gas furnaces
• Condensing boilers
• Tankless water heaters
• HVAC air handlers
• Combustion systems
• Commercial burners

⚙️ Typical functions

It helps safety controls determine:

• Is the inducer fan running?
• Is venting blocked?
• Is combustion airflow correct?
• Is condensate causing pressure issues?

If pressure is wrong, the appliance may:

• lock out,
• fail ignition,
• or display an error code.

🧰 What it’s usually made of

• Silicone tubing
• Rubber tubing
• High-temp flexible polymer hose

Often:

• clear,
• red,
• black,
• or translucent silicone tubing.