Critter Quitters are Removable

We had a call yesterday from someone that said their vent was over their sink, and the sink plugged every now and then. The only way to unplug it was for a plumber to run a plumbers snake down the vent from the roof and he was concerned that the Critter Quitter would block entrance. Remember, we specifically designed Critter Quitters to be removable. They are held in place with 4 stainless steel screws. To remove one simply back out the screws and remove the unit. When finished put it back and tighten the screws. Its an important feature, but we have tried to think of every scenario we could come up with.