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Old 05-13-2014, 11:02 AM   #1
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Wxx3's Avatar
City: New York, NY
Country: USA
Vessel Name: Dauntless
Vessel Model: Kadey Krogen 42 - 148
Join Date: Jan 2013
Posts: 1,907
water tank sending unit

The contacts on my two water tanks have corroded and broke.

I need to replace both sending units.

When I do search, I keep getting sending units for fuel tanks. Do they work with water tanks??

It's not obvious to me why they wouldn't, but that is usually a sign for me that I better ask


M/Y Dauntless, New York
a Kadey Krogen 42 Currently in Western Europe
Blog: http://dauntlessatsea.com
Find us: https://share.delorme.com/dauntless
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Old 05-13-2014, 11:34 AM   #2
Veteran Member
City: Whittier
Country: Mexico/Alaska
Vessel Name: Libertad
Vessel Model: Offshore 54
Join Date: Mar 2012
Posts: 76
I replaced mine a few years ago with a unit from this company:

Tank Level Senders, Fuel Gauges, Marine Gauges, Fuel sending units, Fuel Senders by WEMA USA, Inc.

Very simple installation if you have enough room overhead.

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Old 05-13-2014, 12:21 PM   #3
N4712's Avatar
City: South FL
Country: U.S.A
Vessel Name: Oliver
Vessel Model: Nordhavn 47 Hull# 12
Join Date: Apr 2013
Posts: 3,601
We also have a Wema tank sender and gauge for our water tank, seems pretty accurate; although we have a dipstick to verify true level of our water.
Thanks, Oliver
M/V Oliver
Nordhavn 47 Hull #12
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Old 05-13-2014, 03:30 PM   #4
caltexflanc's Avatar
City: North Carolina for now
Country: USA
Vessel Name: Small Incentive
Vessel Model: Boston Whaler 130 Sport
Join Date: Aug 2011
Posts: 3,436
I gave up on senders and other "level" indicators early on. Bought a Watercounter, one of the very best upgrades we did on the boat. Not only tells you exactly what you have left, but very useful in knowing what is consumed by various uses, such as long/short showers, various modes of laundry and dish washing, etc etc. If you spend a lot of extended time away from the dock (anchoring, mooring, cruising) like we did for a few years, an invaluable device IMO. We got the original WC1.

The World's Best Potable Water Management System For Boats and Rv's | WaterCounter

"There's the Right Way, the Wrong Way, and what some guy says he's gotten away with"
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Old 05-13-2014, 05:20 PM   #5
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City: Gulf Shores, Ala.
Country: USA
Vessel Name: Ulysses
Vessel Model: Romsdal 1963
Join Date: May 2013
Posts: 786
Wema can make on of any length you desire. One note though is that the U.S. and European Standards are opposite in whether 0 ohms is full or empty. Might check and see what gauge requires. Reversing polarity does not work.
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Old 05-13-2014, 08:03 PM   #6
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City: UMR MM283
Country: US
Vessel Name: Northern Lights II
Vessel Model: Bayliner 3870
Join Date: Jan 2013
Posts: 1,140
I also use a WEMA works without problem and they'll build for any depth tank.
Ron on Northern Lights II
I don't like making plans for the day because the word "premeditated" gets thrown around in the courtroom.
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Old 05-17-2014, 09:52 AM   #7
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City: Whidbey Island WA
Country: USA
Vessel Name: Northstar
Vessel Model: Willard 40
Join Date: Oct 2008
Posts: 167
The original water gauge in my 35 year old trawler never worked well, so in perpetration for last summer's cruise to Southeast Alaska I installed the Watercounter reader. My 40' Willard has a single 300 gallon water tank, but my wife always worried about running short for showers and dish washing. I was constantly, and unnecessarily, refilling the tank. The Watercounter solved that problem, and knowing our daily consumption makes it easy to plan ahead for marina visits where we can take on fresh water. Btw, I use a separate water counter attached to my hose to measure what goes into the tank.

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