Black tank cleaning problem.

10 ins. below the floor could well be the bottom of the tank.

Drain the tank to get as much "stuff" out off it. Then fill half full of water, a 1/2 cup of dish washing liquid, automatic dish washing liquid, or laundry detergent with a cup full of bleach and then go for a drive over the curves roads you can 5hink of. Lots of stops and starts so the contents of the tank can slosh around and beat anything loose in the tank. Return home and dump immediately. This really is the best way to clean out the black tank.

Neither my 5ver or Class A go straight down one alternative above another below

Both available at CW and other places

My rig has a 45-degree bend and I have yet a need to wand the black tank. I don't believe we have a pyramid down there and putting about 5 gal of water in there after a dump and letting it slosh around while coming home seems to keep it sparkly clean. :)

I bought that stupid wand too. ditch it.

Fill up you tank with water and some cleaning agent and dump and repeat the process a couple of times. That's really all you need to do.

Note: you don't have to schlep a hose into your MH either.

"Most" bathroom sinks in Class C's dump into the black tank. All you have to do is run the bathroom sink to fill up the tank. When I am at a dump station I can fill that tank up with clean water from the sink to get in a clean water flush in no time flat.

And you will also be surprised how quick it takes to run the water in the sink to fill your black tank. Will make you think twice about washing up, brushing teeth in the bathroom sink if you have a large family. THAT is how black tanks fill up so fast. :W

Rockhillmanor,
I think that you are wrong about the wand that darsban posted. I was at a RV show that the Valterra company demonstrated their wand. They demonstrated the wand with four different types of angles going into the tanks and it worked perfectly. and this statement "And you will also be surprised how quick it takes to run the water in the sink to fill your black tank. Will make you think twice about washing up, brushing teeth in the bathroom sink if you have a large family. THAT is how black tanks fill up so fast" is also wrong. I'm sure if you look that you will see that your bathroom sink is trapped to stop what you are talking about. I know an inspector in the industry that would like to have the name of the manufacturer of the coach that puts any sink water into the black tank.

There are a few manufacturers that dump bathroom sink into the black tank - or at least there were several years ago. I don't remember the brand but I would be watchful for this kind of connection when comparing products.

A offset is not unusual,my Tioga has one and a rigid wand won't work.

This One will work.

But I got tired of dragging the hose in and all the mess that it made
So I installed a Quickie Flush in my Class C and it was one of the best Mods I have done, and pretty simple.

I picked the Quickie Flush over the Tornado because of the high failure rate of the swivel part. A few of my friends had them fail and it leaves it useless in the tank. Freezing around here is not a problem just a poor design.

The only thing that I changed is where the hose connects up with the flusher I put a 90 Degree Elbow in it to reduce the strain on the hose and make it closer to the tank.


It looks like this when finished, with a quick disconnect on the end.


Don't get discouraged if it leaks at the hose connections at first they are sometimes hard to get tight. Tightened mine up and have had no leaks anywhere.
Another suggestion is to make a test hole in a piece of wood or something and test fit the device to the hole. I found that the hole size suggested was much larger than needed.
Good Luck.
BTW Welcome to the Former Rental Club

Tank flushing is NOT a necessity....nice but NOT needed.

Use enough water when flushing toilet (fill bowl full prior to flushing toilet then count 'one thousand one')
Dump black tank when at least 3/4 full
Add couple of FULL toilet bowls of water back into tank after dumping so tank bottom stays wet and sloshes around.

That is all that is needed to keep black tank from having issues.
No toilet wands (some have come apart ---heads/flex in tank)
No dragging hoses inside rig
No cutting holes in side of tank/rig for flush kit
No leaky vacuum breakers spewing water inside rig


As for bathroom sinks (and some showers) draining to black tank.
YES....that happens and there is NOTHING illegal, unsafe or unsanitary about it.
(Industry Inspector would already be aware and would have NO recourse)

For MANY years RVs only had one waste tank.....grey either drained onto ground, in a bucket OR co-mingled with black
Again..nothing illegal about grey/black same tank

Don't make RVng/Camping so complicated

I was told years ago to fill the black tank with some extra water when leaving the campground (if you dump at or near home) or the night before the last day (if you dump at the campground)and let it sit overnight. Then dump and you are good. So far it has worked fine and I don't use any additives.

One suggestion for a good cleaning was to buy a bag of ice, fill the black tank and dump the ice in as you are driving. The ice scrubs the tank with the movement and then melts so you can dump.