All components of the anesthesia delivery system need to be visually inspected daily.

Check all fittings and connections for proper fit.
Check unidirectional valves; ensure that the discs are present and properly placed.
Check all hoses and tubing for any deterioration.
Check vaporizer level.

Gas Source

Open valve on tank(s) to verify that the tank is full and or sufficient for the procedures If it contains insufficient amount change it.
Check for any high-pressure leaks and correct if any are present.

Anesthesia machine and Circle Breathing System

Turn flowmeter to verify that float does not stick in any position in the tube, and then turn off. Connect tubes to the inhalation and exhalation valves.
Attach breathing bag.
Close Pop-off valve.
Occlude the end of the circuit with your thumb.
Pressurize system to 30 cm H 20 by depressing the flush valve. Observe that the manometer holds pressure for 10 seconds. It should not drop more than 5 increments in 10 second s (If a leak is present, turn on the flowmeter to compensate for the leak, a leak of greater than 200m l must be corrected before use. However, all leaks should be corrected before use. Use soapy water to locate leak (s), then correct.).
Relieve pressure by opening the pop-off, the pressure on the manometer should go to 0- 2 cm H 20 (This will insure that the pop-off is functioning correctly) If pressure is maintained then disconnect scavenging hose from the pop-off valve. If pressure is relieved then inspect scavenging system.

Non-Rebreathing system

Ensure connection of fresh gas from the anesthesia machine to non-rebreathing circuit.
Occlude the patient port.
Close the relief valve.
Fill the reservoir bag until it is distended. Should remain full and the pressure should not decrease.
The inner tube can be tested, by occluding it at the patient end with the O2 flowing at 1- 2 L/min. The float in the flowmeter should fall.

Scavenging System

Ensure that the scavenging system is connected to pop-off valve.
If a canister is being used, ensure that the canister output is not occluded. This will cause a buildup of pressure in the system.