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Old 11-14-2015, 12:44 PM   #11
Join Date: Jun 2014
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Black water tank misreading

Originally Posted by Golfnbike13 View Post
Just setup my 195bh at campsite and was putting a little water in the black tank but when I checked the gauge it's reading 3/4 full. I emptied it after last trip and had barely put some water in it so I'm 98% sure it's wrong. Is it there any way to verify?

Any suggestions on how I can fix or accurately gauge the level?

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I had exactly the same problem and found by using Happy Camper ( it was much better. Often after I empty my waste tanks they read 2/3 full. Now when I add Happy Camper and use the toilet a few times it goes from 2/3 to empty and goes back up as I use the toilet. This chemical not only keeps the sensors clean it dissolves the solid matter and prevents odors. Other good waste chemicals will probably do the same thing. I like Happy Camper because it comes I powdered form. I used it the first time because their website said I could return it for a full refund if I was unsatisfied.

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Old 11-14-2015, 03:50 PM   #12
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Ice is good also put a wand in toilet and clean clean clean.

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Old 11-14-2015, 03:50 PM   #13
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We have always had the same issue with both our RV's. I believe it is mainly just TP getting stuck in places, etc. and causing the sensors to misread. Strange this is that our new Legacy has an indicator (status light, green/yellow/red) on the back bath push button. That indicator seems to be a LOT more accurate than the tank level indicator up front.

The advice on keeping the drain valve closed and not emptying until 2/3 is very important and quite sound - follow it closely. You can leave the gray water open it you want, never the black water. Also, something I've found really helps a lot is to get some Calgon liquid water softener (water softener, not fabric softener). Put a cap full in with you chemicals after you empty the tank. This will make the water softer and "slick", which will help to prevent stuff sticking to the sides of the tank. If you want to give it a good cleaning, fill the tank about 1/2 way or so and add the softener before you leave the house. The sloshing while driving should clean the tank up pretty good. Just drain it as soon as you get set up so nothing has a chance to stick again or settle.
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Old 11-14-2015, 06:23 PM   #14
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Keeping track of emptying of black tank

It does seem that the sensors for both the black and gray tank are highly inaccurate. I recognize the change in sound when the black tank is becoming full. I watch the bath tub (low point for the gray water).

We try not to empty the black tank until it is nearly full. I put a piece of blue painters tape on the control panel and record the date (i.e. 11/15). We can always go 5 days between dumping, sometimes 7.

We traveled 17 weeks this summer and this system worked beautifully. We do have to be aware of where we are going next and if we should dump (when facilities are available).
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Old 11-14-2015, 08:48 PM   #15
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Also check out
This is a system I have put in several of my campers. Need to run new whirring but not limited to three tanks. A lot of new campers have a 2nd grey tank giving you 4 tanks where sea level system only goes up to 3 tanks.

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Old 11-15-2015, 01:56 PM   #16
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Originally Posted by Dinostop View Post
Also check out
This is a system I have put in several of my campers. Need to run new whirring but not limited to three tanks. A lot of new campers have a 2nd grey tank giving you 4 tanks where sea level system only goes up to 3 tanks.

Garnets See Level 2 system is not limited to 3 tanks.

Also with See Level 2 you can ground each sensor near the tank, and you only need 1 wire from tank to panel. One wire as in one wire from this tank to the next, to the net, then to the panel. No need to run one, or in the case of tankedge two wires from every tank to panel. The sensors themselves are addressable. Usually you have extra wiring for the factory system in place that you can use with the See Level 2 system.
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Old 12-30-2015, 09:29 PM   #17
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This is my first year owning a Camper and my black tank was doing the same exact thing. I made a wand @ Lowe's and stuck it down my dometic 300 series toilet to fix and it did but my toilet wouldn't hold water the last camping trip. It was a easy fix to say the least and if you have a dometic 300 series toilet here is a youtube video I made about it and what happened. Just be careful if you stick a wand down the toilet to clean it.

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Old 01-02-2016, 11:42 AM   #18
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Also try using calgon water softener
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Old 01-02-2016, 12:00 PM   #19
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In my many years of camping, I've yet to see a set of tank sensors that were accurate. They are a general reference, but sometimes not even that. If mine say full, the tank is full, but at no other time are they "spot on".
No experience with aftermarket units.
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Old 01-02-2016, 12:50 PM   #20
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So, I'm pretty anal (pun intended) about my tanks, and here's what works for me. Starting with a clean tank, in goes a capful of Calgon water softener, a capful of Purex laundry detergent, and the toilet chemical of your choice. I had good luck with Potty Toddy tabs, I bought a pack of TST at Walmart and used it, but I'm going back to the Potty Tabs. When your black tank is full, or when you're ready to leave camp, fill the black and dump. Then refill it and dump again, run your flusher if you have one. Dump, and then put in about 5 gallons of water for the ride home with more Calgon and Purex. It'll clean your tank and sensors on the ride home. Dump when you're home, put in a gallon or 2 of water and another batch of Calgon/Purex/chemical, and you're ready for the next trip. Works well, I never have any odors, and the sensors usually behave themselves. Do a search on "geo method" and you'll get lots of reading info.

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