eHoefler wrote:
The Air-Admittance Valve will not work as a vent, it lets air in so your sink will drain properly. You have to have a vent that will let the gases from your tanks out. The reason you need to have a vent higher than the roof line, is so any breeze can catch it and carry it off. On the side, it can pool and you will not like the aroma, plus sewer gas is deadly and explosive. Any vent, window, or appliance will bring in the gas.
That's pretty much what I mention earlier ;-)
BUT! Maybe I forgot to mention this, we're talking about grey water only. I have a porta potti :-/
In this case it will serve to let air out when the tank is filling up, preventing a gargling sound through the drain pipe.
Is grey water as bad as black water for gases and oders?