Cruisers Forum
 


Reply
  This discussion is proudly sponsored by:
Please support our sponsors and let them know you heard about their products on Cruisers Forums. Advertise Here
 
Thread Tools Search this Thread Rate Thread Display Modes
Old 24-01-2021, 01:06   #1
Registered User

Join Date: Jan 2021
Posts: 4
Simple BlackWater Monitor

My current holding tanks are black and there is no gauge or monitor to see how full they are. I like to keep things as simple as possible and am thinking about installing a sight window. My thought is that the sloshing while underway would prevent any build up that is to thick to see if the tank level is at the window or not. Thoughts? Other ideas for a simple and reliable solution to this problem?
BrknWnd is offline   Reply With Quote
Old 24-01-2021, 09:11   #2
Marine Service Provider
 
peghall's Avatar

Join Date: Feb 2011
Posts: 2,421
Re: Simple BlackWater Monitor

I see you've just joined our merry band of boat owners...welcome aboard!

SCAD tank monitors are top rated and relatively inexpensive, using sensors that attach to the outside of the tank. Scad Tank Monitors

--Peggie
__________________
© 2020 Peggie Hall
Specializing in marine sanitation since '87.
Author "The NEW Get Rid of Boat Odors"
peghall is offline   Reply With Quote
Old 24-01-2021, 09:28   #3
Registered User
 
Andreas W's Avatar

Join Date: Jun 2020
Location: Rügen, Germany
Boat: last boat: 2008 Dix 43 CC, steel, 43 ft
Posts: 81
Images: 2
Send a message via Skype™ to Andreas W
Re: Simple BlackWater Monitor

Quote:
Originally Posted by peghall View Post
I see you've just joined our merry band of boat owners...welcome aboard!

SCAD tank monitors are top rated and relatively inexpensive, using sensors that attach to the outside of the tank. Scad Tank Monitors

--Peggie
Nice equipment Peggie. I was looking for something like that for a client. I don't want to make holes in the tank, so the outside sensors work for me. Thanks for sharing!

Cheers,
Andreas
__________________
'The sea does not take sides.'
Andreas W is offline   Reply With Quote
Old 24-01-2021, 15:00   #4
Registered User

Join Date: Jan 2021
Posts: 4
Re: Simple BlackWater Monitor

Thanks for the advice but I’d prefer something that doesn’t require electricity/electronics?
Anyone on here have a non electronic solution?
BrknWnd is offline   Reply With Quote
Old 24-01-2021, 15:12   #5
Registered User
 
LostDog88's Avatar

Join Date: Dec 2020
Location: Tacoma, WA
Boat: IN Process
Posts: 44
Re: Simple BlackWater Monitor

Quote:
Originally Posted by BrknWnd View Post
Thanks for the advice but I’d prefer something that doesn’t require electricity/electronics?
Anyone on here have a non electronic solution?
Steps for no-Electric tank monitor:

1. Drill 3/4 inch hole in top of tank.
2. Install 3/4 inch plug thingy you can get at home depot.
A. While you are there pick up a yard stick.
3. Dip tank when measurement is required.

Sorry. Couldn't resist being a bit cheeky.

I'll see myself out...........................
LostDog88 is offline   Reply With Quote
Old 24-01-2021, 16:14   #6
Registered User

Join Date: Sep 2020
Location: Ventura, California
Boat: Toes in the surfline and eyes on tomorrow's horizon
Posts: 207
Images: 5
Re: Simple BlackWater Monitor

Quote:
Originally Posted by BrknWnd View Post
Thanks for the advice but I’d prefer something that doesn’t require electricity/electronics?
Anyone on here have a non electronic solution?
A non-electronic solution?

Cut out one side of tank, install Lexan panel in place of cut away tank wall on inside of tank wall, seal really really well.



You could use a sight tube but I suspect it'll get grunged up and non-workable in short order. A better option would be to figure out how to make a flag with a bent wire and a float. You can see them on the tanks of your local septic pump-out trucks.
Rob_P is offline   Reply With Quote
Old 24-01-2021, 16:35   #7
Registered User
 
Franziska's Avatar

Join Date: Mar 2011
Location: Panschwitz, Germany
Boat: Woods Mira 35 Catamaran
Posts: 2,176
Re: Simple BlackWater Monitor

Thinking out of the box here.
Might be worth a try.

As liquids and air tend to have different heat absorption rates, one could stick a temperature sensitive strip on the outside of a reasonably thin walled tank.
Pretty sure it would show a different temperature in the section filled with liquid than the empty one.
Where you can see the biggest temperature change, you tank level is.

Use something like this, but attach it vertical. :
https://www.amazon.com/-/de/dp/B078N..._3jGdGbDZ6NG50

If someone tried, please let us know if it worked.
Franziska is offline   Reply With Quote
Old 24-01-2021, 18:29   #8
Registered User
 
Stu Jackson's Avatar

Join Date: Jan 2011
Location: Cowichan Bay, BC (Maple Bay Marina)
Posts: 8,538
Re: Simple BlackWater Monitor

Tap the tank, as in tap tap tap. Like one hand clapping.


Other folks have used Peggie's book, which is excellent, in which she tells you how many gallons per day people usually contribute, or how much goes in per flush. Handy info to know about.
__________________
Stu Jackson
Catalina 34 #224 (1986) C34IA Secretary
Cowichan Bay, BC, (Maple Bay Marina) SR/FK, M25, Rocna 10 (22#) (NZ model)
Stu Jackson is offline   Reply With Quote
Old 24-01-2021, 18:57   #9
Registered User

Join Date: Jan 2021
Posts: 4
Re: Simple BlackWater Monitor

I like the tapping and temp ideas. Even simpler than my idea! I like the visual from the temp gauge and have a couple of these left over from my blackberry wine making operation. Thanks!
BrknWnd is offline   Reply With Quote
Old 24-01-2021, 19:02   #10
Registered User
 
Franziska's Avatar

Join Date: Mar 2011
Location: Panschwitz, Germany
Boat: Woods Mira 35 Catamaran
Posts: 2,176
Re: Simple BlackWater Monitor

Hey, glad you pick up the idea. Please let us know how well it works.
Franziska is offline   Reply With Quote
Old 27-01-2021, 14:47   #11
Registered User
 
LostDog88's Avatar

Join Date: Dec 2020
Location: Tacoma, WA
Boat: IN Process
Posts: 44
Re: Simple BlackWater Monitor

In the olden days. I had a travel trailer that didn't have tank gauges.

What it did have was a small tube that ran from the bottom of the tank to above the tank fill neck. In that tube was a small floatable plastic BB. When the tank was empty the red BB was at the bottom. When the tank was full the BB was up tall on the plastic see thru tube.
Might work in your situation.
LostDog88 is offline   Reply With Quote
Old 27-01-2021, 14:54   #12
Registered User

Join Date: Mar 2016
Location: Portsmouth, VA
Boat: Morgan 382
Posts: 253
Re: Simple BlackWater Monitor

2 ideas.
The have mechanical fuel tank gauges, with a dial indicator connected to a float. Would probably gum up though.

Drill 2 holes in the side of the tank, one near the bottom, and one near the top. connect them with clear tube.
__________________
-Warren
wholybee is offline   Reply With Quote
Old 27-01-2021, 20:01   #13
Registered User
 
Madehn's Avatar

Join Date: Nov 2014
Location: Kemah Tx
Boat: Gulfstar 51
Posts: 284
Re: Simple BlackWater Monitor

tank tender uses a system with air pressure to measure tanks- they are not cheap but last forever and the people that have them like them- a lot. i use one gauge to measure two water tanks, blackwater tank and fuel tank-- they require putting one fitting on the top of the tank and running a small plastic airline to the gauge (line is the size of a pencil lead). no electricity,. no sensors to go bad etc-- neat little system.
Madehn is offline   Reply With Quote
Old 27-01-2021, 21:31   #14
Registered User
 
GILow's Avatar

Join Date: Sep 2008
Location: Adelaide, South Australia
Boat: Swanson 42
Posts: 7,368
Re: Simple BlackWater Monitor

Quote:
Originally Posted by Stu Jackson View Post
Tap the tank, as in tap tap tap. Like one hand clapping.


.
+1 to this. I've been doing this for a year. (It helps that my tank is beside the toilet.)

Surprisingly accurate too.
__________________
On my way at last.
GILow is offline   Reply With Quote
Old 27-01-2021, 23:32   #15
Registered User
 
Franziska's Avatar

Join Date: Mar 2011
Location: Panschwitz, Germany
Boat: Woods Mira 35 Catamaran
Posts: 2,176
Re: Simple BlackWater Monitor

This system seems to be good and relatively inexpensive.

If Peggie (THE Authority on anything to do with onboard toilets) suggests it.

Unfortunately I have no idea on what principle it works.
Quote:
Originally Posted by peghall View Post
I see you've just joined our merry band of boat owners...welcome aboard!

SCAD tank monitors are top rated and relatively inexpensive, using sensors that attach to the outside of the tank. Scad Tank Monitors

--Peggie
Franziska is offline   Reply With Quote
Reply

Tags
monitor, water

Thread Tools Search this Thread
Search this Thread:

Advanced Search
Display Modes Rate This Thread
Rate This Thread:

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off


Similar Threads
Thread Thread Starter Forum Replies Last Post
Bahia 46: Adding Blackwater Tank GlobalHopper Fountaine Pajot 2 26-01-2012 13:25
New Blackwater Lines - Success! (not THAT bad) bstreep Construction, Maintenance & Refit 0 15-05-2009 15:38
Project: Blackwater line replacement... bstreep Plumbing Systems and Fixtures 8 01-04-2009 14:22
Replacing blackwater lines - need a 180 fitting? bstreep Plumbing Systems and Fixtures 10 03-02-2009 18:07
blackwater bladders craig Construction, Maintenance & Refit 0 10-03-2004 18:03

Advertise Here


All times are GMT -7. The time now is 20:59.


Google+
Powered by vBulletin® Version 3.8.8 Beta 1
Copyright ©2000 - 2021, vBulletin Solutions, Inc.
Social Knowledge Networks
Powered by vBulletin® Version 3.8.8 Beta 1
Copyright ©2000 - 2021, vBulletin Solutions, Inc.

ShowCase vBulletin Plugins by Drive Thru Online, Inc.