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 05-10-2016, 05:17 PM   #1
Member
 
Join Date: Jan 2016
Posts: 68
Normal for bathroom sink to be plumbed to black tank?

On maiden voyage with 2016 Thor Hurricane 29m motor home. My tank gauges have been giving me weird readings so researched and read all the comments about the known inaccuracies of these gauges. During trying to measure the tank sizes I discovered my bathroom sink is plumbed into my black tank. I was under the impression that only the toilet went into the black tank.

This explains why my black tank was filling up quicker than I would expect from two peoples bodily functions. I suppose in some ways this setup is preferable as both black/grey tanks are 40 gallons and the grey tends to fill up faster.

Is the bathroom sink into the black tank normal?
__________________

__________________
Wdeertz 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 05-10-2016, 05:28 PM   #2
Senior Member
 
plasma800's Avatar
 
Fleetwood Owners Club
Join Date: Nov 2013
Location: Houston, Texas
Posts: 3,198
Blog Entries: 1
Lmgtfy

https://www.google.com/search?q=thor...obile&ie=UTF-8
__________________

__________________
RVM#78 - -USAF- F-15 Eagle Radar Vet
'05 Fleetwood Revolution '12 Chevy 2500 '15 Airstream Intl Sig. 27FB
'14 Ram 3500 Aisin
plasma800 is offline   Reply With Quote
Old 05-10-2016, 05:32 PM   #3
Senior Member
 
530ktm's Avatar
 
Join Date: Dec 2014
Location: Northern Arizona
Posts: 1,391
Quote:
Originally Posted by Wdeertz View Post
On maiden voyage with 2016 Thor Hurricane 29m motor home. My tank gauges have been giving me weird readings so researched and read all the comments about the known inaccuracies of these gauges. During trying to measure the tank sizes I discovered my bathroom sink is plumbed into my black tank. I was under the impression that only the toilet went into the black tank.

This explains why my black tank was filling up quicker than I would expect from two peoples bodily functions. I suppose in some ways this setup is preferable as both black/grey tanks are 40 gallons and the grey tends to fill up faster.

Is the bathroom sink into the black tank normal?
In many coaches this is normal.
__________________
2014 Itasca Sunova 33C towing a Jeep JK Wrangler
530ktm is offline   Reply With Quote
Old 05-11-2016, 09:16 AM   #4
Member
 
Join Date: Jan 2016
Posts: 68
Quote:
Originally Posted by plasma800 View Post
Thanks for info, I guess I need to improve my google searches as everything has already been asked and is out there somewhere.
__________________
Wdeertz is offline   Reply With Quote
Old 05-12-2016, 07:40 AM   #5
Senior Member
 
jacwjames's Avatar
 
Monaco Owners Club
Join Date: Jun 2014
Posts: 4,598
Only our toilet is plumbed to drain into the black tank. This is fine with me as we can better control levels knowing this.

When we are boon docking on an extended stay I will do some things to make the gray water tank last longer.

I will do dishes in a plastic tube and then pour this water down the toilet. Even if I am watching water consumption while doing this it doesn't take long to use 3-4 gallons of water.

Getting ready to take a shower I'll use a pot to catch the cold water while waiting on the hot water, probably another 1/2 of water into the gray tank if I don't do this. I'll then use the water I catch to make coffee of fill the dog water bowls.

Every little bit helps.
__________________
Jim J
2002 Monaco Windsor 38 PKD
2005 Jeep Grand Cherokee w/5.7 Hemi
jacwjames is offline   Reply With Quote
Old 05-12-2016, 10:27 AM   #6
Moderator Emeritus
 
Gary RVRoamer's Avatar


 
Join Date: Jan 2000
Location: Silver Springs, FL. USA
Posts: 18,096
I would not say "normal", but it's not unusual either. Sometimes the RV maker does that for his convenience, since the black tank is always directly underneath the toilet (except for macerator type toilets). That may allow some additional flexability in gray tank location, and usually reduces the lubing costs for gray waste lines as well. And they will do anything to save a buck!
__________________
Gary Brinck
Former owner of 2004 American Tradition
Home is in the Ocala Nat'l Forest near Ocala, FL
Summers in Black Mountain, NC
Gary RVRoamer is offline   Reply With Quote
Old 05-12-2016, 12:00 PM   #7
isa
Senior Member
 
Triple E Owners Club
Join Date: Aug 2000
Location: Richmond, B.C., Canada
Posts: 107
It is quite normal for the sink water to be fed into the black water holding tank. Many manufacturers use this arrangement because people just don't use enough water when they flush there toilets. This ensures that the black water tank will have sufficient water in it when you dump.
__________________
isa is offline   Reply With Quote
Old 05-12-2016, 12:21 PM   #8
Registered User
 
mel s's Avatar
 
Join Date: Mar 2010
Posts: 8,777
Quote:
Originally Posted by Wdeertz View Post
On maiden voyage with 2016 Thor Hurricane 29m motor home. My tank gauges have been giving me weird readings so researched and read all the comments about the known inaccuracies of these gauges. During trying to measure the tank sizes I discovered my bathroom sink is plumbed into my black tank.
Is the bathroom sink into the black tank normal?
Wdeertz
It's "normal" on my '96 Safari.

BTW I owned my coach for 10 years, (and used it for over 100,000 miles). before I "discovered" that.

Mel
'96 Safari Sahara 3530
__________________
mel s is offline   Reply With Quote
Old 05-12-2016, 06:39 PM   #9
Senior Member
 
Easyrider's Avatar


 
Workhorse Chassis Owner
Join Date: Dec 2004
Location: Baraboo, Wisconsin
Posts: 1,565
Certainly nothing wrong with toilet and sink plumbed to the same holding tank. Your stick built house all drains to the same sewer line. We use an extra add on valve on our dump valves to connect our grey and black water tanks together which allows us to use the space in the black tank for grey water. Saves us from having to dump the grey water when the black tank isn't even a quarter full.
__________________
Steve & Nancy
2005 Itasca Sunrise 33', W20 Chassis, Ultrapower, Henderson Trac Bar
2012 Chevy Captiva Sport AWD, ReadyBrute Elite Tow Bar, Blue Ox Base Plate, Protect-A-Tow
Easyrider is offline   Reply With Quote
Old 05-16-2016, 08:09 AM   #10
Senior Member
 
W4MBG's Avatar
 
Winnebago Owners Club
Ford Super Duty Owner
Join Date: Nov 2010
Location: Williamsburg, VA
Posts: 650
Ours are plumbed together. 99 Winnebago Minnie.
__________________
1999 Winnebago Minnie 29', Ford V10, Close to stock.
W4MBG is offline   Reply With Quote
Old 05-16-2016, 03:18 PM   #11
Moderator Emeritus
 
Gary RVRoamer's Avatar


 
Join Date: Jan 2000
Location: Silver Springs, FL. USA
Posts: 18,096
Quote:
Many manufacturers use this arrangement because people just don't use enough water when they flush there toilets. This ensures that the black water tank will have sufficient water in it when you dump.
LOL! That sounds a lot more impressive than "it's cheaper and faster to do it that way". It might even have a bit of truth to it. If only I believed any RV maker actually cared how well my black tank functions...
__________________
Gary Brinck
Former owner of 2004 American Tradition
Home is in the Ocala Nat'l Forest near Ocala, FL
Summers in Black Mountain, NC
Gary RVRoamer is offline   Reply With Quote
Old 05-16-2016, 03:37 PM   #12
Community Moderator
 
Scarab0088's Avatar


 
Damon Owners Club
Workhorse Chassis Owner
Join Date: Mar 2012
Location: SoCal
Posts: 14,061
Quote:
Originally Posted by isa View Post
It is quite normal for the sink water to be fed into the black water holding tank. Many manufacturers use this arrangement because people just don't use enough water when they flush their toilets. This ensures that the black water tank will have sufficient water in it when you dump.
isa is correct...

Several TMC models of Motorhomes (like the Outlaw) are Damon Legacy models.
Damon usually ran everything except the toilet to the grey tank...Thor changed that, for the reason described above.

This change required extra piping in some cases.

Knowing TMC's methodology, we (actually just me who does the dump) wish we could simply run the bathroom sink to add water to the black tank for improving black tank health...but since we have the Damon version (which also has no toilet side water-sprayer wand), it's either repeated/high water flushes or more frequent black tank washer/sprayer use in the service bay.

Serious boondockers would obviously want all the sinks going to the grey tank, but I believe for the great majority of RVers, extra water in the black tank is a good option.

The downside to any sink being plumbed to the black tank is that a DRY pee-trap (the goose-neck in the drain) runs the risk of black tank odor entering the coach...ya' gotta try to keep those pee-traps full of fresh water while in storage.

Safe travels
__________________
Kim and Steve, Mustang LCDR (Ret), Damon Outlaw #1193
I have seen gross intolerance shown in support of tolerance, Samuel Coleridge
https://www.irv2.com/attachments/signaturepics/sigpic84535_7.gif
WE LOVE OUR OUTLAW RV
Scarab0088 is offline   Reply With Quote
Old 05-18-2016, 06:28 PM   #13
Senior Member
 
Rich-n-Linda's Avatar
 
Join Date: Nov 2011
Posts: 884
Our Mandalay is plumbed so the bathroom sink empties into the black tank.
__________________
Rich-n-Linda is offline   Reply With Quote
Old 05-18-2016, 06:40 PM   #14
Senior Member
 
Mr_D's Avatar
 
Solo Rvers Club
iRV2 No Limits Club
Join Date: May 2011
Location: Vancouver, WA
Posts: 28,535
Quote:
Originally Posted by isa View Post
It is quite normal for the sink water to be fed into the black water holding tank. Many manufacturers use this arrangement because people just don't use enough water when they flush there toilets. This ensures that the black water tank will have sufficient water in it when you dump.
Yep!!
__________________

__________________
2009 45' Magna 630 w/Cummins ISX 650 HP/1950 Lbs Ft
Charter Good Sam Lifetime Member, FMCA, SKP
RV'ing since 1957, NRA Benefactor Life, towing '14 CR-V
Mr_D is offline   Reply With Quote
Reply

Tags
black tank, tank



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
Bathroom sink drains into Black tank Guernsey Entegra Owner's Forum 15 02-26-2016 09:54 AM
Does bathroom sink drain to gray or black tank? scottandanna Travel Trailer Discussion 11 01-13-2016 03:44 PM
Bathroom Sink draining to Black Water tank bassoneman Class A Motorhome Discussions 18 04-10-2015 07:05 PM
2003 UA 40E - what's plumbed to what tank? McDuff Winnebago Industries Owner's Forum 6 03-03-2007 04:14 PM
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 01:52 AM.


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