Reply
 
Thread Tools Display Modes
Old 06-03-2015, 07:51 AM   #1
Senior Member
 
Join Date: Apr 2012
Posts: 2,742
Black tank flush question

OK- stupid question...... This warning (2nd pic) is referring to the main dump valve, right? My last Puma, a 2015 also, did not have this warning sticker and I want to make sure I'm not missing something here! Also, it appears as though I have a vacuum breaker installed on this one(1st pic)- which a lot of members have had issues with, I think. Anyone remove this and just connect the lines? I see absolutely no reason for a vacuum breaker on a tank with a vent, but????
Attached Thumbnails
Click image for larger version

Name:	File Jun 03, 7 31 57 AM.jpg
Views:	246
Size:	210.9 KB
ID:	78919   Click image for larger version

Name:	File Jun 03, 7 33 13 AM.jpg
Views:	253
Size:	261.5 KB
ID:	78920  
__________________

dustman_stx is offline   Reply With Quote
Old 06-03-2015, 07:57 AM   #2
Senior Member
 
Indymule's Avatar
 
Join Date: Dec 2012
Posts: 586
The vacuum breaker is on the black tank flush to allow the line to drain when the pressure is off. The recommendation to only use the flush when the drain valve is open is because if you leave the flush on and the tank fills, it is going to go somewhere. If it can't go up the toilet, then it will go up the vent pipe and provide a nice #$%^ shower for your trailer.
__________________

__________________
Jay & Maria - Camp Dog Joplin
2018 Cedar Creek Champagne 38EL
Fulltimers since May 2018!
2017 Ford F350 Crewcab Dually Diesel
Officially homeless and loving it.
Ham Callsign K9NDY
Indymule is offline   Reply With Quote
Old 06-03-2015, 08:02 AM   #3
Senior Member
 
Join Date: Jul 2010
Location: Waynesville
Posts: 13,589
Decal is SOP some are not applied. Yep that Valve will/could Fail,BIG water Mess to clean up! If you connect the hoses just use a Outside V-breaker! Youroo!!
youroo is offline   Reply With Quote
Old 06-03-2015, 08:03 AM   #4
Mod free 5er
 
Join Date: Mar 2008
Location: Concord, NC
Posts: 24,680
Yes, I removed mine and cut out about 8' of hose and connected the inlet hose directly to the hose going to the tank. I also have a factory installed backflow valve behind the outside hose inlet.
__________________
OldCoot is offline   Reply With Quote
Old 06-03-2015, 08:13 AM   #5
Senior Member
 
Join Date: Apr 2012
Posts: 2,742
Thanks all!!!!
dustman_stx is offline   Reply With Quote
Old 06-03-2015, 08:23 AM   #6
Senior Member
 
jeff64's Avatar
 
Join Date: Mar 2015
Location: N. Illinois
Posts: 1,166
For the life of me, I can't see this as any more than a tank rinser. If you have a clog or restriction going out of the tank into the pipe, no way in heck are you going to build enough pressure to move it through. I still use the flush king at least one time then the rinser does it's job OK. The vacuum break mod not necessary IMHO
jeff64 is offline   Reply With Quote
Old 06-03-2015, 08:37 AM   #7
Senior Member
 
Join Date: Jul 2010
Location: Waynesville
Posts: 13,589
Quote:
Originally Posted by jeff64 View Post
For the life of me, I can't see this as any more than a tank rinser. If you have a clog or restriction going out of the tank into the pipe, no way in heck are you going to build enough pressure to move it through. I still use the flush king at least one time then the rinser does it's job OK. The vacuum break mod not necessary IMHO
If your the Next person to hook up the Hydrant that has been (Backfed?) from a hose that was filled with (SEWER WATER) you would want one! Youroo!!
youroo is offline   Reply With Quote
Old 06-03-2015, 08:38 AM   #8
Senior Member
 
bubbles's Avatar
 
Join Date: Dec 2012
Posts: 3,219
Quote:
Originally Posted by jeff64 View Post
For the life of me, I can't see this as any more than a tank rinser. If you have a clog or restriction going out of the tank into the pipe, no way in heck are you going to build enough pressure to move it through. I still use the flush king at least one time then the rinser does it's job OK. The vacuum break mod not necessary IMHO
Yes and the proper way to rinse is to close the outlet valve, fill the tank, open the outlet valve till emptied and it's a done deal. Just don't walk away while performing this procedure. Complete the rinsing of the black tank before moving on to something else. Use the indicators or look down the toilet to know when tank is full. You will never have an indicator issue due to something hanging up on the sensors.
bubbles is offline   Reply With Quote
Old 06-03-2015, 08:44 AM   #9
Senior Member
 
bubbles's Avatar
 
Join Date: Dec 2012
Posts: 3,219
Quote:
Originally Posted by youroo View Post
If your the Next person to hook up the Hydrant that has been (Backfed?) from a hose that was filled with (SEWER WATER) you would want one! Youroo!!
The tank is vented and the rinse out tubing is 3 or more feet above the tank. Mine is 5 feet. The input to the tank is at the top of the tank. What you suggest can't happen.
bubbles is offline   Reply With Quote
Old 06-03-2015, 08:49 AM   #10
Site Team
 
Mr. Dan's Avatar
 
Join Date: Mar 2014
Location: Grayson County, Texas
Posts: 8,588
Quote:
Originally Posted by jeff64 View Post
For the life of me, I can't see this as any more than a tank rinser. If you have a clog or restriction going out of the tank into the pipe, no way in heck are you going to build enough pressure to move it through. I still use the flush king at least one time then the rinser does it's job OK. The vacuum break mod not necessary IMHO
I don't know of anyone who thinks of this as more than a tank rinser.

You're right in your assumption that its purpose is NOT to force large blockages out of the black tank system.

If your vacuum breaker failed and blew water all inside your trailer, would you consider it necessary to remove or replace it?
__________________

__________________
SEARCH is your friend!
FR Wildcat 295RSX / GMC Sierra

Nights Camped: '13 = 49 / '14 = 74 / '15 = 74 / '16 = 85 / '17 = 110 / '18 = 84; booked = 12
Mr. Dan is online now   Reply With Quote
Reply

Tags
black, black tank, black tank flush, tank

Thread Tools
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



» Featured Campgrounds

Reviews provided by


Disclaimer:

This website is not affiliated with or endorsed by Forest River, Inc. or any of its affiliates. This is an independent, unofficial site.




Copyright 2002- Social Knowledge, LLC All Rights Reserved.

All times are GMT -5. The time now is 03:38 PM.