How JustAnswer Works:
  • Ask an Expert
    Experts are full of valuable knowledge and are ready to help with any question. Credentials confirmed by a Fortune 500 verification firm.
  • Get a Professional Answer
    Via email, text message, or notification as you wait on our site. Ask follow up questions if you need to.
  • 100% Satisfaction Guarantee
    Rate the answer you receive.
Ask Robert Your Own Question
Robert, RV Mechanic
Category: RV
Satisfied Customers: 13454
Experience:  18 yrs. RV experience including Cummins North West, Country Coach, Monaco Coach - vendor certified.
Type Your RV Question Here...
Robert is online now
A new question is answered every 9 seconds

Big bubble comes up when thetford rv toilet is flushed.this

Customer Question

big bubble comes up when thetford rv toilet is flushed.this has just started .i cleaned the black water tank last week
Submitted: 2 years ago.
Category: RV
Expert:  Robert replied 2 years ago.
Hi my name is Robert..

Make sure the black tank vent on the roof is clear and clean, you should see the abs piping sticking up above the roof line about 4", the cap will go over the piping. Make sure no debris, leaves etc are under that vent cap or the tank will not vent properly, the tank needs to breath. Make sure the piping is not below the roof line as well. I also might get a spray wand and go down into the toilet so you get the piping from the toilet to tank and spray that out really good, want to make sure you do not have any partial blockage in that piping.... Hope this helps... Robert