Question: how to vent ag button?
Answer: Put a 60 mL syringe without the plunger into the G-tube. ...  After unclamping the G-tube you may hear air or see food or stomach juices rise up in the syringe. Allow venting for 1-2 minutes. After all food and stomach juices have gone back down the G-tube, clamp the tube and remove the syringe.