The European suction system that has air in it, what do you check first?

The European suction system that has air in it, what do you check first?

• A. The pump
• B. The check valve
• C. The tank
• D. The suction line to the tank

Answer: (B)

The first thing to check is the check valve. This one-way valve is in the path of the suction and is designed to prevent air from flowing back into the system. If it leaks, won’t seal properly, or doesn’t close fully, air can be drawn into the suction line when the pump isn’t actively pulling, producing air pockets in the system. Because valve failures are a common and direct source of air ingress, confirming the integrity of the check valve quickly determines whether the problem lies with the valve itself. If the valve checks out, you then inspect downstream components like the suction line to the tank, the tank, or the pump to find other sources of air.

The first thing to check is the check valve. This one-way valve is in the path of the suction and is designed to prevent air from flowing back into the system. If it leaks, won’t seal properly, or doesn’t close fully, air can be drawn into the suction line when the pump isn’t actively pulling, producing air pockets in the system. Because valve failures are a common and direct source of air ingress, confirming the integrity of the check valve quickly determines whether the problem lies with the valve itself. If the valve checks out, you then inspect downstream components like the suction line to the tank, the tank, or the pump to find other sources of air.