[jfaberna]

Okay, I went out to the Monty and played with the overflow vent at the rear of my 3402RL. Below are 2 pictures one with the cover removed. You can see the strainer gasket. It removed easily with your finger. You could easily use a funnel with a flexible hose to fill it. The other picture is of the vent cover upside down so you can see the back of it. It has 3 tabs that stick in slots in the vent frame. I just pulled out on one side and it snapped off.