Originally Posted by cwbrown
Yes that's exactly the sheet that I'm looking at. Looks pretty straightforward, and way better than the Roadtrek solution. I will however retain the ability to dump the tanks via gravity.
I installed this kind of mascerator solution, but it failed earlier this week.
There are potential problems, and I don't think that folks that installed this solution have spoken up when it later failed. I may totally wrong about this though.
Keep in mind that mascerator pumps are powerful in terms of flow rate, about 12 gallons per minute. That is more than your garden hose. That is more than your black water tank in less than 1 minute.
1) Sani-con no longer makes a pump that will work as far as I know. I used a Flojet mascerator, this:
2) Care with the existing blue dump hose as the pump is powerful and can collapse it. Don't cut any off or as little as needed to shove the pump into the 4 inch pvc pipe.
3) Now what I think is The Problem: I ran this experiment, and I highly recommend doing it for an actual 'picture' of flow rate!
Note from the pictures on that website that when using the mascerator, the 4 inch pvc pipe is in the up position and stays that way. The 4 inch pvc pipe and 3 inch dump hose inside are horizontal AND are at about the same level as the bottom the black and gray tanks!
Put 2 gallons of water in each tank, black and gray. Lower the 4 inch pvc pipe and end cap, then raise the pvc back up with something that can be easily shoved out lowing the pipe like normal dumping. Move the 'flapper thing' that holds up the pvc pipe, so you can see the flow rate from gravity in the raised position like using the mascerator pump.
Open the gray water tank valve and watch the flow rate. After say 5-10 seconds, lower the pvc pipe and see the Increased flow rate. The gravity energy is just not there. Look at where the tanks, valves and pvc pipe are in the up and down positions.
I know that some folks have used a portable mascerator with pvc pipe lowered. I don't recall any of the outcomes, medium or longer term.
I might try again if I could use the permanent mascerator with the pvc pipe lowered. I have not been able to find the pieces parts to make that work given the rod for the black water tank valve.
Would sure like some responses to the above.