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02-10-2024, 06:29 AM
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#1
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Seasoned Camper
Join Date: Dec 2023
Location: Green Cove Springs
Posts: 56
M.O.C. #33751
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Tank Level Indicators
We have a 2023 Montana 3901RK. My tank level indicators show 1/3 full even when empty. I have tried different flush techniques and flushing liquids and powders but still they show 1/3 even when empty. Does anyone have any suggestions.
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02-10-2024, 07:07 AM
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#2
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Montana Master
Join Date: Oct 2018
Location: Anderson
Posts: 2,596
M.O.C. #22835
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Lots and lots and lots of discussions about tank sensors that don't work. The only "trick" I've found to keep them working, is to dump your tanks completely before traveling. Then add about about 5 gallons of water to each tank, squirt some dish washing liquid down the toilet, or down the drains, and drive to your next destination. The sloshing of the water beating against the sensors will help clean them off.
What happening is, "gunk" get caught on them inside the tank, fooling the sensors into thinking the tank is full.
Your fresh water tank should work pretty accurate most of the time.
What you need to do is learn to pay close attention how much water you are using, listen to the sound of the water hitting the bottom of the tank when you flush your toilet to hear the different sound of the pitch with the water hitting the bottom, and / or use a water meter to monitor how much water you actually use .... or at specific intervals of time, dump your tanks automatically.
Sensors very seldom, if ever, actually work right. Finding another way to monitor your tanks is the best way to do that.
__________________
Who you are right now is a sum total off all you use to be.
2019 Montana High Country 375FL
2014 Chevy Silverado Duramax, 6.6L Dually
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02-10-2024, 08:56 AM
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#3
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Montana Master
Join Date: Jan 2022
Location: Shingle Springs
Posts: 2,236
M.O.C. #30417
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My Mopeka sensors work great. I haven't had any problems. Batteries don't last very long. About 3 months.
__________________
Tony & Donna
2022 Montana HC, 295RL, Solar Flex 400, Onan 3600 LPG, 2K inverter, 200AH Lithium. 2020 GMC Denali 2500 6.6 Duramax, Demco 21K Auto Slide
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02-10-2024, 09:31 AM
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#4
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Montana Master
Join Date: Oct 2004
Location: Salem
Posts: 7,553
M.O.C. #2283
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I have a suggestion don’t trust them. Don’t believe anything they say.
Lynwood
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02-10-2024, 09:52 AM
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#5
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Site Team
Join Date: Sep 2017
Location: Oro Valley
Posts: 3,933
M.O.C. #20477
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Glenn,
The only one I ever look at is the fresh water. No need for the others, you will learn how often you should dump.
__________________
Zack and Donna plus Millie and Ranger
2018 3160RL
"Life is too short to stay indoors, enjoy the ride!"
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02-10-2024, 02:26 PM
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#6
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Montana Master
Join Date: May 2019
Location: Alton
Posts: 2,703
M.O.C. #24086
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Mopeka now makes holding tank sensors.
We have had the propane tank sensors for years. They work great.
It's on my "to do" list to buy and install Mopeka holding tanks sensors.
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02-14-2024, 02:13 PM
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#7
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New Member
Join Date: Jun 2018
Location: North East
Posts: 7
M.O.C. #21939
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This!!
Quote:
Originally Posted by mlh
I have a suggestion don’t trust them. Don’t believe anything they say.
Lynwood
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Ours were correct when we pulled out unit off the dealer lot. Once we put it on a seasonal lot, we never look at the gauges; we can tell it is time to dump by the sound of the water going from the toilet to the tank.
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02-14-2024, 02:59 PM
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#8
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Seasoned Camper
Join Date: Aug 2019
Location: Monument
Posts: 97
M.O.C. #24683
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Lots of guys here have favored the “burp” method for dumping the black tank. When you flush, if there is a burp upward, the vent line has been covered in the tank and it is time to dump. I usually just open the gray valves when I am camped, then close them the day before departure to allow sufficient flushing volume on draining before departure. Of course, if you have a clothes washer, leave that gray tank valve open, to prevent flooding.
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02-14-2024, 10:14 PM
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#9
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Montana Fan
Join Date: Apr 2018
Location: Peachtree City
Posts: 110
M.O.C. #21599
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Quote:
Originally Posted by Foldbak
My Mopeka sensors work great. I haven't had any problems. Batteries don't last very long. About 3 months.
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Didn't know they made sensors for holding tanks? I use them on my LP tanks.
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