Hi. The water seems to be going down very slowly in my galley drain. (much slower than it used to). I have twin sinks which drain into a 1" hose which goes down to the thru-hull. I suspect this 1" hose might be clogged. If I were to 'snake' the drain would it damage the thru-hull? I am reluctant to use any chemicals due to both the environmental impact or damage to the boat's plumbing. COuld I use a wet/dry vac to try and suck the clog back up the drain hose? Thanks in advncae.