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10-11-2018, 04:36 PM
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#1
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Senior Member
Join Date: Jul 2017
Location: bridgman
Posts: 238
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Black tank flush
Does my black tank flush have a anti syphon back flow preventor ? I am trying to come up with an adapter so it would be safe to use with the fresh water hose. I have a 28.5 RSTS
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10-11-2018, 04:55 PM
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#2
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Senior Member
Join Date: Dec 2014
Location: FL
Posts: 11,281
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As far as I know, all 'recent' trailers come with them. Maybe someone out there knows when that started. Our 2015 has one.
What year is your RV?
__________________
Sherm & Terry w/rescue Eydie (min Schnauzer) & Charley (std Poodle)
SOLD:2015 Jay Flight 27RLS, GY Endurance (E), Days: 102 '15, 90 '16, 80 '17, 161 '18, 365+ '20
SOLD: 2006 Ford F350 PSD, 4WD, CC, LB, SRW, Camper pkg., 375,000mi
Full timing: Some will think you're crazy, some will be envious, just enjoy the freedom!
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10-11-2018, 05:05 PM
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#3
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Senior Member
Join Date: Jul 2017
Location: bridgman
Posts: 238
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2018, where would it be ? When I unhook the water hose water flow's out of the flush fitting.
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10-11-2018, 05:09 PM
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#4
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Senior Member
Join Date: Jun 2017
Location: johnstown
Posts: 321
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It's inside the trailer. The water that runs out is what's left before the backflow.
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10-11-2018, 05:24 PM
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#5
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Senior Member
Join Date: Jul 2017
Location: bridgman
Posts: 238
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I will look tomorrow. Is it unsafe to use the same hose for the flush and fresh water if you have a back flow preventor ? I hate Rolling up an extra hose.
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10-11-2018, 05:40 PM
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#6
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Senior Member
Join Date: May 2015
Location: Charles Town
Posts: 470
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It might be safe but I personally would never take that chance. My fresh water hose is for fresh water only. It really is not that much trouble to carry two hoses.
__________________
2014 Toyota TundraTRD double cab 4x4 tow package off road package 46 gallon fuel tank
2018 Jayco White Hawk 23MRB solar equipped
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10-11-2018, 06:15 PM
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#7
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Senior Member
Join Date: Jun 2017
Location: johnstown
Posts: 321
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Quote:
Originally Posted by Racinforthefinish
It might be safe but I personally would never take that chance. My fresh water hose is for fresh water only. It really is not that much trouble to carry two hoses.
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X2 I always run two hoses. If rolling is a pain get a coil hose for the black flush.
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10-11-2018, 07:17 PM
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#8
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Senior Member
Join Date: Jul 2011
Location: Ottawa Valley
Posts: 403
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If you look at page 3 of Today’s Posts there is a thread started by Jktb about this topic and leaks, “Black tank backflow preventer location”. He has the same model as you, only with bunks. I chimed in on it so please have a look at it.
__________________
Married To The Navigator
2005 Red GMC Duramax 4X4 HD Crew Cab
2018 North Point 315RLTS
4" Magnaflow, Banks Air Intake
Firestone Ride Rite Air Springs
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10-11-2018, 08:28 PM
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#9
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Senior Member
Join Date: Apr 2017
Location: Las Cruces
Posts: 1,148
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If you bought your trailer used it may have been disabled due to leakage. Mine was. The valve itself on mine was behind the shower faucet.
__________________
2017 Eagle HT 29.5BHOK (sold)
2017 Ford Powerstroke 6.7, Crew, 4x4 (sold)
2018 Toyota Highlander
Maggie, Old English Sheepdog
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10-11-2018, 09:11 PM
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#10
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Senior Member
Join Date: Jun 2016
Location: Mechanicsville
Posts: 1,479
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I moved the anti-siphon back flow preventer to the outside of my trailer. I did not need water leaking into my rear storage compartment on my Jayco 23RB.
__________________
Erroll and Mary Doss and Duffy (RIP)
2018 Jayco Redhawk 22J
2014 F150 SC, 4x4, HD Pkg, Sterling Gray
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10-12-2018, 08:27 AM
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#11
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Senior Member
Join Date: Oct 2015
Location: Worcester
Posts: 1,428
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Why risk it.. Use a separate hose.
__________________
2016 Jay Flight 38FDDS
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10-12-2018, 09:04 AM
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#12
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Senior Member
Join Date: Jul 2017
Location: bridgman
Posts: 238
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Will do.your right.
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11-03-2018, 12:17 PM
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#13
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Senior Member
Join Date: Oct 2018
Location: Out there somewhere
Posts: 1,620
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I have one of those shrinking hoses that I use as a utility hose for everything except for my fresh water tank. It came with a shutoff on the male end. I use it to flush my black tank and always use the shutoff on the hose while under pressure. This prevents any back flow from happing should it occur.
I agree with others, you should not use same hose for the fresh water tank. I had a back flow preventor valve go bad on my first rig!
John
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11-03-2018, 12:19 PM
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#14
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Member
Join Date: Mar 2018
Location: Gilbert
Posts: 83
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Always seperate hoses! We might be extreme here, but we also clean the spigot for the fresh water hookup at the site with some rubbing alcohol just in case someone hooked up their flush hose. Not 100% I know, but should kill most things. I also picked up a few hose clamps and fittings I can quickly connect to my flush hose if the dump station has a hose but no hose end on it to hook it the flush connection on the FW (to prevent people from filling their fresh tanks with it).
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11-03-2018, 01:15 PM
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#15
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Member
Join Date: May 2017
Location: Santa Fe
Posts: 32
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Separate hoses - always
Some of the dump stations we visit don’t have any hose, but they do have a spigot *and* very clearly say the water is non-potable. Backflow prevention or not, I don’t want that water running through my drinking water hose.
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11-03-2018, 01:22 PM
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#16
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Senior Member
Join Date: Aug 2011
Location: Missouri City, The Republic of Texas
Posts: 5,063
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I have 2 totes, one is for fresh water things, the other is for sewer things. My BT hose lives in the “black” box.
__________________
Cheers,
T_
2013 F-350 CC SB 2WD 6.7PS
2013 Eagle Premier 351 RLTS
-SOLD- 2012 X23B
-SOLD- 2003 Ford Expedition 5.4, Bilstein shocks
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11-03-2018, 01:41 PM
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#17
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Junior Member
Join Date: May 2018
Location: Meridian
Posts: 10
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Aren't these things called CHECK VALVES?
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11-03-2018, 04:22 PM
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#18
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Senior Member
Join Date: Oct 2010
Location: Cape Girardeau
Posts: 303
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Quote:
Originally Posted by Philski
Aren't these things called CHECK VALVES?
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https://www.menards.com/main/plumbin...4446177824.htm
__________________
********************************
2018 Eagle 30.5 MBOK, L-dinnete, orbital pinbox, Husky 16k W, 2016 Ford F-250 Lariat w/tow pacakge, Crew, 6.7
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11-05-2018, 08:24 PM
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#19
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Junior Member
Join Date: Jul 2018
Location: Modesto
Posts: 14
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My 2018 267bhsw has a back flow. It’s just inside the wall where the hose connection is made
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11-07-2018, 10:46 AM
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#20
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Senior Member
Join Date: Dec 2017
Location: Dallas/Ft. Worth
Posts: 269
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Quote:
Originally Posted by hyperactive
I will look tomorrow. Is it unsafe to use the same hose for the flush and fresh water if you have a back flow preventor ? I hate Rolling up an extra hose.
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As long as you don't mind the possibility of dysentery or E coli, go for it!
An extra (different colored) hose is a small price to pay I'd say.
__________________
--
Keith (& Teresa)
2017 Greyhawk 29ME
Dallas/Ft. Worth, TX
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