Bjesquivel wrote:
Does anyone put a makeshift P trap in your sewer hose to prevent sewer smells from traveling back up into your tanks/rv?
Welcome to the forum. I see this is your first post. As you now know, you do not need a P Trap in the hose. The tanks are vented so, any odors will go out the vent.
And, you should keep at least the black tank valve closed until it's just about full. The tanks dump better when they're full or close to full.
Dump the black tank first, use the grey tank to flush the line after dumping the black tank.
It was not a dumb question, if you don't know, just ask.
Enjoy your travels.