Toilet won't flush

Time for a trade in?

How far down did the broom handle go; just inches after the hole, or a foot or two before bumping into something solid?

Another question? Do you ever flush your black tank out after dumping?

Just trying to figure out where the blockage is actually occurring?

What kind of toilet do you have? Do the tanks seem correctly aligned when you look under the rig?

Open black tank dump valve ...then have someone flush toilet/hold toilet open
See if black tank drains more out of it.....clogged tank vent/toilet open provides venting

go up on the roof and check inside the black tank vent stack.. it's prob clogged with an insect or bird nest, or there's a forign object in your tank blocking the outlet drain, like a piece of wood from the factory (seen it before) or a feminine product (those are no-no's in an rv toilet).

Thanks for all the helpful replies.

I started with a large plunger. Open the flush valve and push. On the first push I heard a bang come from below the toilet but no drainage. I repeated the plunging for about 10 times. No drainage. I got a short snake with a long handle. It felt like I couldn't touch bottom with it. So I went back and got a 15' snake. It went all the way in, but I think it was curling up. Still no drainage. I went up on the roof and checked the vents. They're both open.

Could I use something like Drano on it? Would that hurt the system?

I tried the broom handle again and it goes 18" (measured) before hit something. How do you find the tank outlet?

I then gently stuck a broom handle down the hole and met a solid surface.

I don't know how your RV is configured, but in mine, the toilet is positioned directly above the black tank, so when you open the toilet flapper valve and look down when the tank is empty, you can see the translucent plastic bottom of the tank.

So if I suck a broom handle down my toilet hole, it also would strike a solid surface - the bottom of the tank.

If your tank is full of water, you have to potential problems:

1) The tank is not draining. The way to verify this is as was said above: Simply open your drain valve with no hose hooked up, have someone flush the toilet. Water should come out of the waste gate. If no water comes out, you have a blockage.

2) You have a water leak somewhere that is filling your black water tank. In some RVs I am given to understand that not just the toilet dumps into the black tank. Sometimes the bathroom sink or other things can also dump into the black tank. If this is the case on your RV, and you have a leaky faucet, it could be filling up your black tank.

Steve

On my RV, the tank outlet is about 12" away from the waste gate. A black pipe goes from the tank to the waste gate. When I lift my access hatch, I can see my black tank and the waste gate.

Steve

Something that I don't understand is that yesterday when I drained my black tank you could hear flow and feel it in the drain tube. So I know it was draining. But why did it backup into the toilet today? Is there some kind of pre-black tank holding tank?

Any help appreciated.

Do you perhaps have electric dump valves?