I used the hot and cold low point drains on the curb side of our trailer. I installed two ball valves, bought a cheap kitchen faucet installed it to the lid of a rubbermaid container, connected it together with white water hose and use two plastic dishpans as sinks. It sits on a folding plastic table beside trailer. As for drain water if its from doing dishes it gets dumped down the sewer hookup in the ground, washing hands gets the grass watered. I can`t take credit for this as I stole the idea from this forum under modifications about two years ago. Search for sink in a rubbermade tub. It has to be the best mod that I have ever done.