Air box drain

I used a nut a bolt and a washer to cover it at one point until I noticed a puddle of mud sitting in the bottom of the airbox so I took it out.
 
I can't say I've ever gotten much water in mine and I've ridden through swamps. I don't have anything covering the drain. Just check every so often and make sure its not wet or muddy.
 
i dont have anything on mine, but mine is cut off and different shapped lol. i know on the kodiak there is a little rubber plug looking thing that fill up with water and you take it off to dump it.