I have seen the aftermarket drain plugs for some carbs that have a hose to trap water, but you have to empty them occasionally if you think you have water issues. Not sure if they are available for the flat slide carbs or not. Mostly a polaris thing, as far as factory usage. You could drill ald tap a 1/8" NPT in your existing carbs drain plug and make your own hose drain, if you think you really need it.