Reply
 
Thread Tools Display Modes
Old 06-03-2015, 02:23 PM   #21
Senior Member
 
mTn_biKer65's Avatar
 
Join Date: Jun 2010
Location: Kingston, Ontario
Posts: 290
Quote:
Originally Posted by Jim in Halifax View Post
I recently was rinsing our black water tank and a neighbor camper came over to ask a ?'n...Went off with him.....Heard the BH holler.....Water came up thru toilet on BRm floor..A mess!!!!!!!!! just stinky water as I had rinsed just a few mins previous........Would like to install a water timer on hose to shut off after a few minutes......This will not happen again!!!!!!!!!!!!!! J
Hmmm I actually have a sprinkler timer I bought but never used for the lawn. Might just need to give this one a try to see how it works.
__________________

__________________
Nights camped
2007 Shamrock F19 hybrid - 2010 (22 nights), 2011 (24 nights), 2012 (11 nights)
2013 Surveyor Select 235RKS -
2012 (6 nights), 2013 (32 nights), 2014 (26 nights), 2015 (37 nights), 2016 (14 nights)
mTn_biKer65 is offline   Reply With Quote
Old 06-03-2015, 02:27 PM   #22
Senior Member
 
Join Date: Aug 2014
Posts: 218
Quote:
Originally Posted by richp View Post
Hi,

I added a simple, cheap in-line valve right at the female fitting that takes the flush hose. Close that valve before shutting off the water at the faucet, and there will be no back-flow.

FWIW.

Rich Phillips
Yup that's what I do as well.
__________________

__________________
Carrier is offline   Reply With Quote
Old 06-03-2015, 07:28 PM   #23
Senior Member
 
VinceU's Avatar
 
Join Date: Dec 2011
Posts: 3,502
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!!

Youroo is correct here. The VacBreak is installed under Fed Regs by USPHS ( US Public Health Service regulations.) the purpose is not to drain the pipe or act as a check valve. It's design and only purpose is to break a vacuum if the pipe it's installed in attempts to flow backwards. This can happen if the shore supply should abruptly lose pressure, well pump failure, or city water main failure. If that occurs, the branches can and will flow backwards. Piping under "dirty water" ie sinks, tubs, holding tanks etc, can allow this stuff to be sucked into the fresh water mains. Tank flush piping normally in tank end about 1/3 way down andl could certainly fall into the storage area mentioned above. We are dealing with ecoli bacteria here, the more precautions the better to prevent accidental spreading disease. To visualize how to make vacuum, picture a 100' well stops suddenly. The water within will seek its own level, all the water in its system will fall with it thus vacuum at all its spigots and open valves.


Sent from my iPad using Forest River Forums
__________________
VinceU is offline   Reply With Quote
Old 06-03-2015, 07:35 PM   #24
Senior Member
 
VinceU's Avatar
 
Join Date: Dec 2011
Posts: 3,502
Quote:
Originally Posted by youroo View Post
That's OK F/R makes lots of RVs and they are Plumbed different! Youroo!!


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!!

Youroo is correct here. The VacBreak is installed under Fed Regs by USPHS ( US Public Health Service regulations.) the purpose is not to drain the pipe or act as a check valve. It's design and only purpose is to break a vacuum if the pipe it's installed in attempts to flow backwards. This can happen if the shore supply should abruptly lose pressure, well pump failure, or city water main failure. If that occurs, the branches can and will flow backwards. Piping under "dirty water" ie sinks, tubs, holding tanks etc, can allow this stuff to be sucked into the fresh water mains. Tank flush piping normally in tank end about 1/3 way down andl could certainly fall into the storage area mentioned above. We are dealing with ecoli bacteria here, the more precautions the better to prevent accidental spreading disease. To visualize how to make vacuum, picture a 100' well stops suddenly. The water within will seek its own level, all the water in its system will fall with it thus vacuum at all its spigots and open valves. Doesn't matter 3 or 5' loop height, perfect vacuum will pull 34'h! Vac brk must open to prevent tragedy.


Sent from my iPad using Forest River Forums
__________________
VinceU is offline   Reply With Quote
Old 06-03-2015, 07:44 PM   #25
Mod free 5er
 
Join Date: Mar 2008
Location: Concord, NC
Posts: 24,215
Quote:
Originally Posted by VinceU View Post
Youroo is correct here. The VacBreak is installed under Fed Regs by USPHS ( US Public Health Service regulations.) the purpose is not to drain the pipe or act as a check valve. It's design and only purpose is to break a vacuum if the pipe it's installed in attempts to flow backwards. This can happen if the shore supply should abruptly lose pressure, well pump failure, or city water main failure. If that occurs, the branches can and will flow backwards. Piping under "dirty water" ie sinks, tubs, holding tanks etc, can allow this stuff to be sucked into the fresh water mains. Tank flush piping normally in tank end about 1/3 way down andl could certainly fall into the storage area mentioned above. We are dealing with ecoli bacteria here, the more precautions the better to prevent accidental spreading disease. To visualize how to make vacuum, picture a 100' well stops suddenly. The water within will seek its own level, all the water in its system will fall with it thus vacuum at all its spigots and open valves.


Sent from my iPad using Forest River Forums
Then why have a backflow preventer behind the inlet hose like mine did?
__________________
OldCoot is offline   Reply With Quote
Old 06-03-2015, 08:38 PM   #26
Senior Member
 
VinceU's Avatar
 
Join Date: Dec 2011
Posts: 3,502
That is a check valve prevents pump pressure from escaping when hose is not connected. Few years back mine froze and I managed to dislodge the valve disc with pump on.....
__________________
VinceU is offline   Reply With Quote
Old 06-03-2015, 08:42 PM   #27
Senior Member
 
Join Date: Dec 2014
Posts: 175
Quote:
Originally Posted by dustman_stx View Post
Not a hydraulics expert, but my thinking- and the way I've flushed the black tank in the past is-

1. Drain black tank
2. Close main valve
3. Connect water hose to black tank connection
4. Fill tank to 3/4 full
5. Drain black tank with water on
6. Repeat steps 4 and 5 ~ 3X
So you waste 75 gallons ( or there about) of fresh water flushing out your black water tank??? Wow.... No need for that.
__________________
ActionJackson is offline   Reply With Quote
Old 06-03-2015, 08:43 PM   #28
Mod free 5er
 
Join Date: Mar 2008
Location: Concord, NC
Posts: 24,215
Quote:
Originally Posted by VinceU View Post
That is a check valve prevents pump pressure from escaping when hose is not connected. Few years back mine froze and I managed to dislodge the valve disc with pump on.....
Has nothing to do with the pump, it is a separate hose connection strictly for the black tank flush.
__________________
OldCoot is offline   Reply With Quote
Old 06-04-2015, 08:55 AM   #29
Senior Member
 
Join Date: Apr 2012
Posts: 2,429
Quote:
Originally Posted by ActionJackson View Post
So you waste 75 gallons ( or there about) of fresh water flushing out your black water tank??? Wow.... No need for that.
You don't get to make that call for me. I don't water my lawn and don't have a pool, so we'll say I'm still much more conservative than most folks. I will say this, however; I have a dump station at my house where I flush and the camper leans heavily toward the sensor side. Therefore, in reality I'm not actually filling my tank to 3/4 full. I only fill until the sensors read full and are covered during the flush.
__________________
dustman_stx is offline   Reply With Quote
Old 06-04-2015, 09:04 AM   #30
Site Team
 
Flybob's Avatar
 
Join Date: Oct 2014
Posts: 5,564
Quote:
Originally Posted by dustman_stx View Post
Not a hydraulics expert, but my thinking- and the way I've flushed the black tank in the past is-


4. Fill tank to 3/4 full
5. Drain black tank with water on
6. Repeat steps 4 and 5 ~ 3X


?
Huge waste of water and fills dump station tank quickly. If you have a 45G black tank and use this procedure, you add 100 G extra to dump station, If 40 Rv's do this in a day that is 4000G . End result is the park has increased pumping costs and raises fees.
__________________

__________________

2015 Freedom Express 248RBS
TV 2015 Silverado HD2500 Duramax
TST Tire Monitors
Honda 2000I + Companion
2 100W solar panels
Flybob 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



» Virginia Campgrounds

Reviews provided by




ForestRiverForums.com is not in any way associated with Forest River, Inc. or its associated RV manufacturing divisions.


Copyright 2002- Social Knowledge, LLC All Rights Reserved.

All times are GMT -5. The time now is 09:03 PM.