Forum Discussion

captron33's avatar
captron33
Explorer
May 10, 2022

Black tank not draining!

My flush system flushes the tank but only clear water is draining. It is apparently plugged up higher. When i try to flush with the pedal, it appears to be full.. i put in a blue pack and tried to use the flush system, only clear water goes out the sewer hose , clear plastic. How to clear it if the plug is higher up from the tank? I don’t have a sewer snake but is that what I should try?
Thanks
Class A

22 Replies

Show More
  • way2roll's avatar
    way2roll
    Navigator III
    May 10, 2022
    I think more info is needed. When you say you flush the toilet and it looks full, how do you know? Is it not flushing? Can you see it's actually full, visually? What do your tank levels read? Have you let the black tank fill completely before dumping? (this is the recommend method) What is a "blue pack"? And lastly, are you pulling the correct valve?
  • Lwiddis's avatar
    Lwiddis
    Explorer II
    May 10, 2022
    I'd try a snake and then driving with some radical turns, starts and stops. Make sure there is water in the tank.

About Motorhome Group

38,738 PostsLatest Activity: Jul 26, 2025