Holding tank sending unit replacement

RalphD

Member
Mar 4, 2021
39
Wenham Massachusetts
Boat Info
2006 52’ Sedan Bridge
Engines
MAN
Hi,
I have a 2006 52’ sedan bridge with a bad sending unit in the holding tank. The parts manual shows the part number as 1806042. I have been unable to find a replacement on line using this part number. Does anyone have an alternate part number or a link to a replacement.
Thanks in advance,
Ralph
 
Hi,
I have a 2006 52’ sedan bridge with a bad sending unit in the holding tank. The parts manual shows the part number as 1806042. I have been unable to find a replacement on line using this part number. Does anyone have an alternate part number or a link to a replacement.
Thanks in advance,
Ralph
Ralph,

Here's what I have in my notes for my 58's 68 gallon HT:

Dometic Float Switches
http://seacoastservices.com/kit-switch-float-lock-ring/
Dometic 385311103
385311254 is the part number for 24"
https://marinepartssource.com/dometic-22-vented-holding-tank-probe-cap-sealand-313000350.html
https://www.environmentalmarine.com/flex-probe-22-230930/

Hope this helps.
 
Hi,
I have a 2006 52’ sedan bridge with a bad sending unit in the holding tank. The parts manual shows the part number as 1806042. I have been unable to find a replacement on line using this part number. Does anyone have an alternate part number or a link to a replacement.
Thanks in advance,
Ralph

Try These folks https://marinesan.com/
 
I have been talking to these people. If your indicator is like mine, it reads empty, 1/2, and full. Marine Sanitation has a replacement unit that is plug and play that will read empty, 1/4, 1/2, 3/4, and then full. Hooks up with existing wiring and is what I plan to go with.
They have some of the best customer service I have ever seen. You can email or even text them for help.

Bennett
 
Do you know it doesn't work or is it just stuck? Mine was just stuck when I got the boat. After a few tank cleanings and using the right tank cleaner it is working fine now. If you can pull it out easily I would do that, clean it and test it out of the tank. Not exactly a fun job but you may be surprised that you can clean it and get it working.
 
There are actually 3 floats (Empty, 1/2 and full) If you remove it from the tank, you can try each float individually and see if you get a reading. If not, then I would recommend unpluging the 4 wire connector and make a jump wire to see if you get a reading on the gauge at each tank level.
 

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