I have been living in my 36' fiver about 1 1/2 years. I have never put any solids or TP in the toilet. Gray is only for normal usage, dishes, showers, etc. I empty the tanks no more than a week. All has been well. We poured a slab and the fiver has been relocated to the slab. I went to empty the tanks, like normal, and nothing came out of either tank. Gray valve is a bit difficult to operate, but this is not new. Black valve works like normal. It has been about a week since the move, and only normal use, but still unable to empty. I would like to empty them for piece of mind to say the least. I have used the flush attachment to add water, and that comes out no issue. What additive would be advised to try and get this to work normally? I am not a happy camper not knowing how much is in the tanks.

If you have never put solids into the toilet and are using the flush feature and that water comes out as you say, I would have to think the tanks are empty.:?

Turn off water, open the toilet bowl valve and shine a light down into the tank - unless you have a bend in the pipe. Is there water in there? what do the sensors say?

My first thought is you have frozen stuff in the tanks. It's been cold lately so it's possible you may have a giant ice cube in both tanks. The water from the flush would run out as long as the discharge wasn't blocked.

Davidlee64 wrote:What additive would be advised to try and get this to work normally?Walex Commando is designed specifically to deal with this issue, has always worked well for me.

Black and Gray Tank issue. | Good Sam Community

Ex-Tech
Explorer
Feb 05, 2019
If you have never put solids into the toilet and are using the flush feature and that water comes out as you say, I would have to think the tanks are empty.:?
2012Coleman
Explorer II
Feb 05, 2019
Turn off water, open the toilet bowl valve and shine a light down into the tank - unless you have a bend in the pipe. Is there water in there? what do the sensors say?
the_bear_II
Explorer
Feb 05, 2019
My first thought is you have frozen stuff in the tanks. It's been cold lately so it's possible you may have a giant ice cube in both tanks. The water from the flush would run out as long as the discharge wasn't blocked.
Lwiddis
Explorer II
Feb 05, 2019
Not that cold in Glendale, AZ.
SoundGuy
Explorer
Feb 05, 2019
Davidlee64 wrote:
What additive would be advised to try and get this to work normally?

Walex Commando is designed specifically to deal with this issue, has always worked well for me.
Davidlee64
Explorer
Feb 05, 2019
the bear II wrote:
My first thought is you have frozen stuff in the tanks. It's been cold lately so it's possible you may have a giant ice cube in both tanks. The water from the flush would run out as long as the discharge wasn't blocked.

It has been a bit chilly here, but I haven't seen much freeze at 50°.
2edgesword
Explorer
Feb 05, 2019
If you're not putting any solids in the tank (I consider taking a dump adding solids) what are you putting in there?
doxiemom11
Explorer II
Feb 05, 2019
We've used our toilet/black tank as you would your toilet at home for over 8 years full-time. That includes using toilet paper. The only thing we do is make sure to use enough water when we flush so that there is never a build up of the solids (paper and the other) We have never had a problem. Are you putting something other than just water in the tank - are you using enough water when you flush to keep it from solidifying and just liquid draining off when you dump? Keep it all floating so it flows out?
valhalla360
Navigator
Feb 06, 2019
If you put water in the tank and immediately drain...and you hear water flow out, the valves are working.

One possibility, do you have a leak? We had a cracked drain fitting on a prior trailer and the water would all leak out before we went to drain. Only figured it out when I went to drain as tammy finished dishes and I saw it leaking. It was just a drip but over a few hours, it could empty the tank.

No a chemical addative is unlikely to do anything since you haven't put in any solids (not that it's likely to help even if there were solids).
Davidlee64
Explorer
Feb 06, 2019
2edgesword wrote:
If you're not putting any solids in the tank (I consider taking a dump adding solids) what are you putting in there?

I urinate in the toilet then add about 3 cups of plain water. As I said previously, I do not put anything else in the toilet. I have a custom anatomy which can come in handy at times, lol.