I am with WTD44, the bypass always plugged up causing the gray tank to fill up so you have to constantly check the tank levels. The thing is noise so everyone knows what you are doing. I am sure it bothers the next door neighbors. If someone uses too much TP it will plug the thing up stopping the motor, now you have big problems (get the bucked and gloves it's going to get messy). I finely removed mine to make room for other stuff. It's in the barn so if I ever sell the rig I can put it back on. Never had much trouble with the 3" hose. I know some of you have special conditions that may require it but in 25+ years of camping the 3" hose worked fine for me.