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 > Black holding tank censors

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rockhillmanor

On the Road

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Posted: 07/23/19 06:01am Link  |  Quote  |  Print  |  Notify Moderator

MFL wrote:

I always add water, about 3-4 gals down the stool after dumping, then traveling, to wash the sides by sloshing. My sensors have worked well in all my RVs.Jerry


X2 My sensors always work.

I do use chemicals all the time that break down waste and paper in my tank.
[image]

And after dumping I always also add water to tank.

My sink dumps into the black tank so after dumping all I do is run the water in the sink to fill bottom of black tank.


We must be willing to get rid of the life we've planned,
so as to have the life that is waiting for us.


jerryjay11

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Posted: 07/23/19 06:31am Link  |  Quote  |  Print  |  Notify Moderator

Been doing this with the last 3 RV's. Do this along with your regular tank chemicals after each dump.

The Recipe:
Dissolve two (2) cups of the water softener in a
gallon of hot water. Then, pour the solution down the
drain into the empty tank. Use two cups of softener
for each wastewater tank in your RV. The tank's
drain valve should be closed otherwise the softened
water will just drain out. Then use the tank(s)
normally until it is full and drain it normally. Add a
cup of laundry detergent to the black (commode)
water tank at the same time you add water softener.
This will help clean the tank. The gray water tanks
should already contain soap through normal use.

GrandpaKip

Flat Rock

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Posted: 07/23/19 09:04am Link  |  Quote  |  Print  |  Notify Moderator

Our sensors have always worked reasonably well. Black tank flush, couple gallons of water, and a capful of laundry softener.


Kip
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Cardinals

New York

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Posted: 07/23/19 12:06pm Link  |  Quote  |  Print  |  Notify Moderator

My vote is ignore them, we dump the black tank every four days and make sure it is cleared out and the start another four days. Buying the liquid to clean them is a waste of money

The ugly duckling

Central New York

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Posted: 07/23/19 01:56pm Link  |  Quote  |  Print  |  Notify Moderator

SoundGuy wrote:

Your tank sensors mount to the inside of the tanks and clog, especially the black tank. The solution is to replace them with sensors that read from outside the tanks.

SeeLevel Tank Gauges



I replaced mine with the See Level Tank Sensors. They work beautifully and are fairly accurate. Fairly straight forward to install and you can leave your old none functioning sensors in place.

opnspaces

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Posted: 07/23/19 02:50pm Link  |  Quote  |  Print  |  Notify Moderator

I do not use any chemicals, I do not add dish soap or water softening powders or follow the geo method. By and large my sensors usually work correctly. Once in a while one acts up, but it's not the norm. Make sure your tank is 3/4 full or more and use the 3 inch drain hose and let it drain. I do have an installed aftermarket tank sprayer. But after I've have to replace two sprayers and had three different times where the hose blew off and soaked the insulation of the underbelly; I would not recommend the aftermarket Camco tank sprayers.


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ejd43

Pennsylvania

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Posted: 07/23/19 07:12pm Link  |  Quote  |  Print  |  Notify Moderator

Thank you all so much for the advice. I'm going to try dumping a few gallons of water in with some dawn soap to see how it reacts.

opnspaces

San Diego Ca

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Posted: 07/24/19 11:58am Link  |  Quote  |  Print  |  Notify Moderator

There was a guy who did a video series testing black tank emptying and cleaning solutions. you might find some of them interesting.

Original test

Much longer but worth at least the first 8 minutes
Adding ice cubes to black tank
Testing mounting height of tanks

time2roll

Southern California

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Posted: 07/24/19 12:18pm Link  |  Quote  |  Print  |  Notify Moderator

I use a Quckie-Flush with a custom spray pattern to direct water at the sensors. Also to direct more water to the side of the tank opposite of the drain. The 'junk' oem sensors still work perfect after 14 years.


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Lynnmor

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Posted: 07/24/19 01:57pm Link  |  Quote  |  Print  |  Notify Moderator

Those "sensors" are merely bolts thru the side of the tank, not some fancy electronic device. They do not need to be clean, the problem is the scum on the tank wall bridges the space between the bolts and allows current to flow. The system works by applying voltage to the bottom bolt and water completes the circuit. The more bolts reached by water, the higher the gauge reading. Keeping the tank wall clean will allow the gauge to work properly, but that is nearly impossible. If you use chemicals, soaps, detergents, water softeners or anything else, remember that they will increase current flow so the tank needs thorough rinsing with clean water after use, just like washing anything else.





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