sink, drain
My p-30 sink,drains into the bilge, with a removable cap on a plastic hose, it works well for me after a weekend of ice melted I release the cap and it flows into the bilge where I have installed a small electric pump, this also helps flush the bilge wit some cleaner water.Replaced water tank with a flexable 30 gal, I drain that with a foot pump then remove the bag for the winter, allowing me to flush it a few times with the hose, we don't use this water for drinking but use it for washing only.good luck Terry