I have a trailer that I would like to set upabout two hundred feet from the house and septic tank. There is a slope that would allow gravity to pull the waste downhill. My question is this: Should I have a flex tube connecting the trailers holding tank to the 4 ABS at maybe a ground level opening or should I attempt to connect hard pipe from the trailer straight to the line that I will be setting up. Also, should I let the solid waste build up in the trailers holding tank and release it maybe once a week or should I keep the flow open at all times? Also is the venting system installed in the trailer (27, 1982 layton) sufficient to vent this new set up or should I create another vent outside the trailer?