Go Back   iRV2 Forums > MOTORHOME FORUMS > MH-General Discussions & Problems
Click Here to Login
Join iRV2 Today

Mission Statement: Supporting thoughtful exchange of knowledge, values and experience among RV enthusiasts.
Reply
  This discussion is proudly sponsored by:
Please support our sponsors and let them know you heard about their products on iRV2
 
Thread Tools Search this Thread Display Modes
 
Old 10-12-2010, 07:28 PM   #1
Senior Member
 
CoCoDave's Avatar
 
Country Coach Owners Club
Join Date: Jul 2009
Location: Sequim, WA
Posts: 1,177
Replacing Black Tank Sensors

Like many others, we have experienced flaky black tank sensor readings. The other readings have been reliable so replacement of the whole system was not considered.

Being both lazy and cheap gives rise to internal conflict when trying to make decisions of this kind. New, sophisticated, fancy monitoring system? Installed by a commercial shop? Not cheap.

Buy new sensors and install them myself? Not attractive to the lazy side.

But, oil change looms, generator is due for service, and steer tires need replacing. So in the end, cheap trumped lazy.

I've no financial interest in Horst Miracle Probes. They just appealed to me as a good balance between cost, ease of installation, and likelihood of acceptable performance.



Horst Mircacle Probes - Click here to go to Horst web site.

The 2001 Diplomat wet bay was not designed and constructed with an eye toward replacing black or grey tank sensors. Fortunately the gray tank sensors are working well and only the black tank sensors needed replacing.

The original sensors are of a type that is glued in and are not removable, so holes needed to be drilled near the old sensor locations to accept the new probes. That way the new probes can use the existing wires and report tank levels as the original design intended. Gaining access to the holding tank by removing the large PVC wet bay panel is very difficult in terms of disconnecting plumbing and other fittings. So I elected to cut holes in the panel with a hole saw to access the old sensors and install the new ones. Now, if they ever need to be cleaned or replaced the holes are already there.



To avoid drilling into the tank, a piece of 7/16" OSB (oriented strand board) was placed behind the panel. The panel can be pulled away from the holding tanks some amount if the mounting screws and brackets are first removed.



The pilot drill length was adjusted to prevent its penetration into the tank. Extraneous holes in the black tank would surely be a source of great unpleasantness.



The positions of the holes were established with a ruler and measuring tape. I started with 1" holes but they were too small to work through. The second two were cut with a 1.5" hole saw.

Once the holes were cut it was relatively easy to unscrew the nut that fastened the wire to the existing sensor, drill a 3/8" hole in the black tank, and insert the Miracle Probe. Some fiddling was needed to orient the new probe so that the seal was tight and the milled flat on the threaded stud was facing down. This is required to keep the Teflon shield (roof, tunnel, etc.) positioned over the probe which serves to prevent hair, toilet paper, and other matter from hanging up on the probe itself. Once the probe assembly was secure in its hole it was easy to attach the wire which already had a crimped on eyelet.



Covers for the holes were fashioned out of PVC pipe caps. I'm lucky enough to have a lathe which came in handy for this. However, I would have been happy to use bottle caps or any other handy material, securing them with a little caulking.



We just returned from a 2.5 week trip to Arizona and the probes worked perfectly. If for some reason they fail to perform as advertised and require cleaning or repair or replacement, the hard part has already been done. I can simply remove the cover in the hole and proceed with whatever action is required.

FWIW
__________________

__________________
Dave & Cathy, 2002 Country Coach Affinity, 42', #6103, CAT C12, 2012 Cherokee Overland
CoCoDave is offline   Reply With Quote
Join the #1 RV Forum Today - It's Totally Free!

iRV2.com RV Community - Are you about to start a new improvement on your RV or need some help with some maintenance? Do you need advice on what products to buy? Or maybe you can give others some advice? No matter where you fit in you'll find that iRV2 is a great community to join. Best of all it's totally FREE!

You are currently viewing our boards as a guest so you have limited access to our community. Please take the time to register and you will gain a lot of great new features including; the ability to participate in discussions, network with other RV owners, see fewer ads, upload photographs, create an RV blog, send private messages and so much, much more!

Old 10-12-2010, 07:39 PM   #2
Moderator Emeritus
 
RickO's Avatar


 
Join Date: Jan 2007
Location: Litchfield Park, Arizona
Posts: 10,530
Great work and just an outstanding write up Dave! With so many of us fighting this problem I'm sure many will benefit from you taking the time to share in such a professional manner. If only our manuals were easy to understand!

Thanks,

Rick
__________________

__________________
Rick, Nancy, Peanut & Lola our Westie Dogs & Bailey the Sheltie.

2007 Itasca Ellipse 40FD
RickO is offline   Reply With Quote
Old 10-13-2010, 07:31 AM   #3
Senior Member
 
hardy1000's Avatar
 
Monaco Owners Club
Join Date: Feb 2009
Posts: 1,306
Great write up & pics Dave. I will be replacing my black water tank probes also.
__________________
Del & Lori 2007 Diplomat 40PDQ - 2009 Jeep Wrangler Unlimited Rubicon.
hardy1000 is offline   Reply With Quote
Old 10-13-2010, 08:21 PM   #4
Senior Member
 
AFChap's Avatar
 
Winnebago Owners Club
Spartan Chassis
Join Date: Aug 2002
Location: ...hopefully on the road!
Posts: 4,719
I replaced my gray and black tank probes last January with Horst Miracle Probes. They are working great. My comments & pics are on my website here ...the price was much more reasonable than other options, and they were pretty easy to install after I got access to the tanks.
__________________
Paul (KE5LXU) ...was fulltimin', now parttimin'
'03 Winnebago UA 40e / '05 Honda Odyssey toad
AFChap is offline   Reply With Quote
Old 06-10-2017, 01:12 PM   #5
Member
 
tstillman's Avatar
 
Join Date: Apr 2017
Location: Vancouver, WA
Posts: 60
Great write up. I'll be referring to this later down my list of "Must do's".
__________________
Tom & Ann Stillman
Vancouver, WA - 360-600-5349
2006 Monaco Knight 38ft PDQ
tstillman is offline   Reply With Quote
Old 06-10-2017, 02:10 PM   #6
Senior Member/RVM #90
 
MSHappyCampers's Avatar


 
Monaco Owners Club
Join Date: Nov 2002
Location: Columbus, MS
Posts: 26,328
Thanks Dave! Excellent documentation!
__________________

__________________
Joe & Annette

2002 Monaco Windsor 40PBT, 2013 Honda CRV AWD
MSHappyCampers is offline   Reply With Quote
Reply



Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
 
Thread Tools Search this Thread
Search this Thread:

Advanced Search
Display Modes

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
Plan to clean black tank level sensors ?? dmason Monaco Owner's Forum 11 07-15-2010 07:17 AM
BLACK TANK: "can we" or "can we not" leave the black tank open in an RV park?? doodlebug52 Travel Trailer Discussion 15 12-02-2009 10:56 PM
Black Tank Easy Flush: What does it look like? Always-RVing MH-General Discussions & Problems 2 10-22-2009 03:40 AM
Black Tank Flushing Hose leak repaired. Ragman National RV Owner's Forum 2 01-29-2008 07:50 AM
Outside shower plumbed to black tank sprayer troth Winnebago Industries Owner's Forum 12 04-04-2006 07:27 AM

» Virginia Campgrounds

Reviews provided by


Copyright 2002- Social Knowledge, LLC All Rights Reserved.

All times are GMT -6. The time now is 07:38 AM.


Powered by vBulletin® Version 3.8.8 Beta 1
Copyright ©2000 - 2017, vBulletin Solutions, Inc.