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08-20-2011, 07:45 AM
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#1
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Senior Member
Join Date: Apr 2011
Location: Philadelphia PA
Posts: 460
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Winterizing gray and black tanks
Almost done camping for the seaon. First time winterizing my TT. Is winterizing the gray and black tanks as easy as flushing them out and then filling them with a few gallons of water and add antifreeze?
Thanks,
Bill
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Bill & Cindy McKenna
Philadelphia PA
2015 Palomino Puma 32DBKS
2005 Ford Excursion 6 liter Turbo Diesel
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08-20-2011, 07:52 AM
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#2
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Senior Member
Join Date: Jun 2011
Location: Jamestown NY
Posts: 588
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Just flush them out and leave them dry. Just make sure they are drained dry, no need for any anit-freeze in the grey or black tanks.
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2012 Winnebago "Journey To Insanity" 40U
2008 Dakota Sport 4x4
2004 Subaru Baja - DW's
2006 Honda Shadow Aero - TOAD for now.
F.R.O.G. member
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08-20-2011, 08:38 AM
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#3
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Senior Member
Join Date: Aug 2010
Posts: 855
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Actually no need for antifreeze in any of the tanks, including the water heater. Antifreeze is designed to prevent the water lines from freezing in case there is some residual water left in them. Using an air compressor set at about 10PSI pressurize the lines and turn on the faucets one at a time until there is no more water coming out. Take the drain plug out of the water heater tank. Be sure the winterize valves are set correctly and fill the system using the water pump. Done deal.
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08-20-2011, 08:44 AM
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#4
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AKA Bluebird
Join Date: Aug 2006
Location: Charlottesville, VA
Posts: 1,060
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I suggest you get one of these for flushing your tank. It makes filling the black tank prior to flushing it very easy. Just open the toilet and drop this in the hole. Gently release toilet flush lever and this will remain in place, water will run and tank will fill. When about full, go outside and open the sewer connection to drain the tank. Repeat several times.
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Happy Camping! ///// Richard D.
2006 4x4 Ford 250 SD / 2007 Flagstaff 827 FLS
One very patient wife and one furry child who travels with us. Forty-two years of trailering and camping, and I still have a blast.
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08-20-2011, 08:47 AM
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#5
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Moderator Emeritus
Join Date: Sep 2008
Location: Shenandoah Valley of Virginia
Posts: 9,280
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Quote:
Originally Posted by dimurrrw
I suggest you get one of these for flushing your tank. It makes filling the black tank prior to flushing it very easy. Just open the toilet and drop this in the hole. Gently release toilet flush lever and this will remain in place, water will run and tank will fill. When about full, go outside and open the sewer connection to drain the tank. Repeat several times.
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Now, ain't that the neatest item. When using my spray wand, I usually end up taking off my right shoe and opening the valve with my toes. Many times I have wished for a foot control flush valve. This should solve the problem.
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Chap , DW Joy, and Fur Baby Sango
2017 F350 Lariat CCSB, SRW, 4x4, 6.7 PS
2017 Grand Design Reflection 337RLS
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08-20-2011, 08:55 AM
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#6
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AKA Bluebird
Join Date: Aug 2006
Location: Charlottesville, VA
Posts: 1,060
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Quote:
Originally Posted by mtnguy
Now, ain't that the neatest item. When using my spray wand, I usually end up taking off my right shoe and opening the valve with my toes. Many times I have wished for a foot control flush valve. This should solve the problem.
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These have been around since day one. Surprised you haven't seen them before. Proof of the old adage about "Give a lazy man a hard job..."
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Happy Camping! ///// Richard D.
2006 4x4 Ford 250 SD / 2007 Flagstaff 827 FLS
One very patient wife and one furry child who travels with us. Forty-two years of trailering and camping, and I still have a blast.
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08-20-2011, 10:17 AM
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#7
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Senior Member
Join Date: Apr 2011
Location: Philadelphia PA
Posts: 460
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Hey, to all those who replied, Thanks for the information and tips!
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Bill & Cindy McKenna
Philadelphia PA
2015 Palomino Puma 32DBKS
2005 Ford Excursion 6 liter Turbo Diesel
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08-21-2011, 11:38 AM
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#8
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The Old Man
Join Date: Jun 2010
Location: Huntersville, NC
Posts: 330
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Quote:
Originally Posted by Bilcin
Almost done camping for the seaon. First time winterizing my TT. Is winterizing the gray and black tanks as easy as flushing them out and then filling them with a few gallons of water and add antifreeze?
Thanks,
Bill
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Personally, after flushing the black and grey tanks for the season and closing them, I add a gallon of antifreeze to the black tank (the grey tank will get enough antifreeze in it just from filling the lines and traps). I don't think there is any way to know for sure that the tanks are completely dry and I don't want any residual water sitting against the valve areas to freeze. A gallon of antifreeze is cheap insurance.
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2010 Flagstaff 829RGSS
Still to go: AK, NL, NT, NU, YT
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08-21-2011, 12:49 PM
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#9
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Moderator Emeritus
Join Date: Sep 2008
Location: Shenandoah Valley of Virginia
Posts: 9,280
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I think 1 important last step is to drain the lines to both the black and gray tank. If any water is left in the lines at the valves, that has more potential to do damage than a little water left in the very bottom of the tanks.
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Chap , DW Joy, and Fur Baby Sango
2017 F350 Lariat CCSB, SRW, 4x4, 6.7 PS
2017 Grand Design Reflection 337RLS
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08-21-2011, 07:17 PM
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#10
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Senior Member
Join Date: Jul 2007
Location: Detroit Lakes MN home of We Fest
Posts: 304
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08-21-2011, 07:31 PM
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#11
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camping
Join Date: Feb 2010
Location: Elkhart, Indiana
Posts: 988
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Quote:
Originally Posted by Willis
Personally, after flushing the black and grey tanks for the season and closing them, I add a gallon of antifreeze to the black tank (the grey tank will get enough antifreeze in it just from filling the lines and traps). I don't think there is any way to know for sure that the tanks are completely dry and I don't want any residual water sitting against the valve areas to freeze. A gallon of antifreeze is cheap insurance.
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x2-
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2007 Chevy 2500HD CC
2010 V-Lite 30WRLTS
Nights Camped 2011 -64
Nights Camped 2012 -50
"I Live in My Own World, But It's OK. They Know Me"
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08-21-2011, 07:46 PM
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#12
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Moderator Emeritus
Join Date: May 2010
Location: Ontario, Canada
Posts: 800
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Quote:
Originally Posted by Willis
Personally, after flushing the black and grey tanks for the season and closing them, I add a gallon of antifreeze to the black tank (the grey tank will get enough antifreeze in it just from filling the lines and traps). I don't think there is any way to know for sure that the tanks are completely dry and I don't want any residual water sitting against the valve areas to freeze. A gallon of antifreeze is cheap insurance.
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X3
That's the same procedure that I've been following w/ no issues up here in Ontario.
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08-21-2011, 09:31 PM
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#13
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Senior Member
Join Date: May 2008
Location: Saskatchewan
Posts: 149
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After pulling the anode rod and drain the water heater I use a wet and dry vac to pull out the remaining water...you would be surprised how much gets left behind.
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2010 Rockwood 8281SS Signature Ultra Light
2009 Dodge Ram 2500 w/6.7 Cummins
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11-07-2011, 12:06 PM
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#14
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Senior Member
Join Date: Mar 2011
Location: Wisconsin
Posts: 1,337
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I flushed out our gray and black water tanks yesterday before winterizing. We're using the blow-out method. I couldn't believe how much "gunk" (I won't go into nasty details) was still left in the tanks. I rinsed and dumped them three times to make sure they were both clean as a whistle. Should I leave the dump valves open during winter? DH drained the water heater and apparently didn't read the info about the residual pressure....he came away totally soaked!
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2012 Rockwood 8293RKSS
2006 Dodge Ram 2500 5.9L Cummins Turbodiesel 4x4; 2012 Ford Escape 4x4. 3 very pampered cats.
Days camped: 2011: 61; 2012: 66 Days; 2013: 69;2014: 68 2015: 90 Days camped 2016: 34
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11-07-2011, 09:57 PM
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#15
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Anacortesians
Join Date: Oct 2010
Location: Anacortes, WA
Posts: 1,166
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The temperature at which water with "stuff" in it will freeze declines as a function of the percentage of "stuff". Your black tank contents probably wouldn't freeze until about 24 degrees, but why would you leave that stuff in there? Grey tank would probalby be OK down to about 28 degrees, but again, why would you leave stuff in there?
If both tanks are at relatively low content levels (say less than a quarter full) there's enough air space for them to freeze without doing any damage.
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Frank and Eileen
No longer RVers or FR owners
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