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 05-31-2016, 07:31 PM   #1
Junior Member
 
Join Date: Mar 2014
Location: Virginia
Posts: 15
Plumbing question. How should my sink drain pipe be connected to my black water tank?

My bathroom sink and black water tank vent pipe share a connection to my black water tank. Whenever the tank is full and the black water sloshes around, we notice a horrible smell in the coach and of course it’s leaking on the top of the tank. I thought there was a problem with one of the connections, so I have taken the shelves out of my sink vanity so I could see what was going on. I discovered the drain/vent pipe is not actually connected. The 1.5” vent/drain pipe is just sitting over the 2 or 2.5” threaded opening in the top of the tank. I can’t think it would be, but does anyone know if this is by design for some reason? I would think this pipe should actually to be connected to the top opening and that is what I plan to do. I need to know if I should glue the connections like everything else currently is or if I should connect it with one on those rubber sleeves. Gluing it will make it a ‘harder’ connection with no give and the sleeve will allow for some slight movement, without breaking the pipe. No give would mean the pipe could crack and the rubber sleeve could inadvertently become disconnected. Either would allow black water into the cabin area. At least the way it is now, the black water does not come into the cabin, only the smell does. Any thoughts or suggestions/recommendations?
__________________

__________________
VaDreamer 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 05-31-2016, 08:14 PM   #2
Senior Member
 
Tiffin Owners Club
Freightliner Owners Club
Join Date: Aug 2014
Posts: 1,831
I would use a sleeve because the vent pipe should go through the roof, and is sealed at the roof. Don't break that seal.

Unless there are some elbows in the connection.

Someone likely forgot to make the connection at the factory.

Da
__________________

__________________
2014 40QBH Phaeton DP Cummins 380HP ISL, Freightliner XC, 2014 Jeep Trailhawk TOAD
Blue Ox Aventa tow bar, SMI Air Force One -South Orange County Ca.
dpinvidic is offline   Reply With Quote
Old 06-01-2016, 03:25 AM   #3
Senior Member
 
slowmachine's Avatar


 
Nor'easters Club
Freightliner Owners Club
Holiday Rambler Owners Club
Join Date: Dec 2014
Location: Alton, NH
Posts: 1,093
In another thread, you mention that this is a 1999 model. I think it is safe to assume that the pipe was connected to the tank at one time, rather than a factory assembly error. A rubber sleeve with hose clamps could be a good temporary fix. I would be trying to determine how the connection was broken in the first place. The worst-case scenario is probably that the black waste tank has come unsecured from its mounts and is moving around while you drive. It could be a lot messier than just a broken connection if you ignore it.


Mike
2000 HR Endeavor
Freightliner XC, CAT 3126B
__________________
Mike
2000 Holiday Rambler Endeavor 40PBD
Freightliner XC, CAT 3126B
slowmachine is offline   Reply With Quote
Old 06-01-2016, 03:51 AM   #4
Senior Member
 
slowmachine's Avatar


 
Nor'easters Club
Freightliner Owners Club
Holiday Rambler Owners Club
Join Date: Dec 2014
Location: Alton, NH
Posts: 1,093
Another thought... This could have been caused by someone carelessly applying pressure to the roof vent. Topside damage is also likely to cause water damage to the coach, so I wouldn't wait very long to examine it.


Mike
2000 HR Endeavor
Freightliner XC, CAT 3126B
__________________
Mike
2000 Holiday Rambler Endeavor 40PBD
Freightliner XC, CAT 3126B
slowmachine is offline   Reply With Quote
Old 06-01-2016, 07:07 AM   #5
Junior Member
 
Join Date: Mar 2014
Location: Virginia
Posts: 15
Unfortunately I cannot get to or even see much of the black water plumbing connections. It took several hours just to get to where I am, just to be able to look down through a 4" hole to see the tank opening. My goal at the moment is to get the issue fixed at least semi-permanently, use the coach for another year or 2 and then sell it and let the next owner deal with any new issues.
__________________
VaDreamer is offline   Reply With Quote
Old 06-01-2016, 07:45 AM   #6
Senior Member
 
Waiter21's Avatar
 
Ford Super Duty Owner
Join Date: Nov 2014
Location: Toledo, OH
Posts: 2,566
Rubber sleeve is probably easiest and offers flexibility of the joint.
__________________
1999 Fleetwood Southwind 35S (Ford F53 6.8L V10) - Toad 2003 Saturn Vue.
It won't do MACH 2, but I can get a sandwich and take a pee.
Waiter21 is offline   Reply With Quote
Old 06-03-2016, 05:42 AM   #7
Senior Member
 
ImagesByHawk's Avatar
 
Holiday Rambler Owners Club
Join Date: Nov 2013
Posts: 155
Usually a sink is connect to the gray tank. Only the toilet is connect to the black tank.

Have you tried adding any gray tank treatment...pouring it down the sinks and shower drains?
__________________
2004 HR Ambassador 38PDQ
http://usa-rvnomads.com/
ImagesByHawk is offline   Reply With Quote
Old 06-03-2016, 07:40 AM   #8
Senior Member
 
Join Date: Dec 2007
Posts: 968
That horrible smell is coming from your gray tank not the black and is most likely from an accumulation of small food and grease particles
1. Under your sinks are small valves. At the age of your rig they are probable worn out. They unscrew. Go to any large hardware and buy new ones for a few dollars each
2. empty your gray tank, dump in a half a box of baking soda, a glug of vinegar and . Let it foam. Fo!low with very hot water. Now add a few Tablespoon of Dawn. Fill your gray tank by running water from your faucet Do this before departing on your next trip.
Upon arrival empty the gray. You will be amazed at the small junk, including hair that cones out

We do this treatment every 3 months No more nasty smell
__________________
Ron & Linda
2000 Dynasty 38PBS
Full time since 2007
Nana25K is offline   Reply With Quote
Old 06-03-2016, 08:01 AM   #9
Senior Member
 
OLYLEN's Avatar
 
Monaco Owners Club
Join Date: Jan 2008
Location: Olympia, Wa
Posts: 2,045
Many many bath sinks ARE connected to the black tank rather than the gray tank. OP has opened the area and confirmed this non connection problem. My MH has a sensual activation switch therefore all MH's have one, not ALL RV's have the same systems.

LEN
__________________
2004 Clss C 31' Winnebgo
OLYLEN is offline   Reply With Quote
Old 06-03-2016, 08:39 AM   #10
Senior Member
 
Timon's Avatar
 
Join Date: Jul 2014
Location: Tustin, CA
Posts: 969
Sounds like the traps are not staying full.

That said, having the Kitchen sink plumbed to the Black tank is a good thing if you boondocking on BLM land. In some BLM locations your allowed to dump Gray water on the ground but only if you Kitchen sink and dishwasher do not go to the Gray tank since these dump food particles into the tank. Bathroom sinks, shower and cloths washer don't.
__________________
John (N6BER), Joyce, Lucas (Golden Retriever mix), Bella (Great Pyrenees) and Lance (Great Pyrenees).
Tustin, CA
Timon is offline   Reply With Quote
Old 06-12-2016, 09:36 PM   #11
Junior Member
 
Join Date: Mar 2014
Location: Virginia
Posts: 15
Just an update on where I am and what I have done.

The bathroom sink is definitely draining into the black water tank. I'm sure it was done mostly for plumbing convenience, as the sink is directly over the black water tank. Not sure if the pipe was not connected from the factory or if the pipes was replaced and not reconnected. There was no good way to tell.

I cut the pipe with a hack saw and replaced the pipe section and elbow with an automotive radiator hose. I connected the hose to a threaded coupling and attached the coupling to the tank, so I now have a secure connection and all seems well. I plan to leave this as the permanent fix, since the radiator hose is more flexible than the ABS and should provide the same durability.
__________________
VaDreamer is offline   Reply With Quote
Old 06-14-2016, 10:45 AM   #12
Moderator Emeritus
 
Gary RVRoamer's Avatar


 
Join Date: Jan 2000
Location: Silver Springs, FL. USA
Posts: 17,424
Sounds like a good solution to me.
__________________
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 06-30-2016, 07:07 PM   #13
Junior Member
 
Join Date: Mar 2014
Location: Virginia
Posts: 15
My radiator pipe solution is working like a champ, however now when I flush the toilet, I am getting smelly air backwash, as if the vent is stopped up.

Any ideas?
__________________
VaDreamer is offline   Reply With Quote
Old 06-30-2016, 07:16 PM   #14
Senior Member
 
Join Date: Feb 2011
Location: Snowbird - Waterford Mi and Citrus Springs Fl.
Posts: 3,585
My next step would find me up on the roof, checking to see if the vent is plugged and the cap is properly installed up there. On some of them, it might be possible to have the vent pipe that extends through the roof a little too far and become restricted by the cap when installed - not able to free flow as designed.

A bucket of water poured down the vent pipe would confirm it's open, not restricted in some unseen area.
__________________

__________________
1997 37' HR Endeavor, 275hp Cat, Freightliner
03 CR-V Blue Ox, Ready Brake
ahicks is offline   Reply With Quote
Reply

Tags
plumbing, tank, water



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
Leaky, under sink drain pipe. Help! aandbr Just Conversation 24 12-28-2014 05:20 AM
Shower drain pipe not connected mgunner Gulf Stream Owner's Forum 4 08-19-2013 10:39 AM
Freightliner diagnostics-connected or not connected? etcmss Freightliner Motorhome Chassis Forum 2 09-22-2011 03:20 PM
Black Water Tank Vent Pipe Question Suncircles Winnebago Industries Owner's Forum 10 06-30-2010 04:04 PM
Black tank leak between tank and drain pipe Yozzie Winnebago Industries Owner's Forum 4 10-15-2008 03:28 PM

» Virginia Campgrounds

Reviews provided by

Our Communities

Our communities encompass many different hobbies and interests, but each one is built on friendly, intelligent membership.

» More about our Communities

Automotive Communities

Our Automotive communities encompass many different makes and models. From U.S. domestics to European Saloons.

» More about our Automotive Communities

Marine Communities

Our Marine websites focus on Cruising and Sailing Vessels, including forums and the largest cruising Wiki project on the web today.

» More about our Marine Communities


Copyright 2002- Social Knowledge, LLC All Rights Reserved.

All times are GMT -6. The time now is 02:38 AM.


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