Quote:
Originally Posted by Farish
I have a 2015 Allegro Red…Guess my black tank has a clog….Will not empty…. Any suggestions on how to resolve this issue?
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If I were you, I would try this method first, assuming you have black & gray water valves just inches from each other and leading to one sewer hose...
- Start out with your gray tank pretty full...over 66%
- Keep your sewer hose connected to the drain, hopefully with a see-through elbow at the end so you can see the color of the wastewater. Make sure the hose has a downward slope to the drain with no sagging along the way.
- Open your black tank valve and keep it open
- Open your gray tank valve fully and keep it open until the sewer hose is full of water. Hopefully the rush of water that occurs when you first opened it will push against the clog in the black water tank to help dislodge it. Once the hose is flooded, close the gray water valve. Now hopefully the water in the hose is acting to suck on the clog in the black tank with a siphoning effect.
- Let the water drain out of the hose and repeat the open/close of the gray tank valve until you can confirm that the black tank is emptying. That confirmation will be either visual through the clear elbow and/or just listening to hear if the black tank is emptying.
- If it appears that there is some black tank flow when you do this but it's still not completely emptied, I'd fill up the gray tank a second time and repeat the process. Actually, don't wait for the gray tank to completely empty - if you don't get a rush of water each time you open the valve, it's not going to accomplish much.
- If successfully emptied, run water through the flush valve to clean as much debris out of the tank as possible.
If this siphoning effort failed, I would try attaching a garden hose to one of these to see if that kind of focused back pressure might chew away at the clog:
https://www.amazon.com/Camco-Rhino-B.../dp/B00T36KRS2