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01-22-2016, 04:44 PM
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#1
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Member
Join Date: Aug 2014
Location: Wherever the military sends us!
Posts: 55
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Black Tank / RV Anti-freeze
Ok. So I've seen multiple answers and want to do some more research. I live fulltime in our 5th wheel with my husband. We are dealing with snow right now and really low temps. I dumped the black tank yesterday so it's empty so we won't have to do it again for a week or so. We do have a heated water hose and skirting up. My question is, I use the Geo Method. Would it hurt to put some RV Antifreeze in my black tank? And if I can use it how much? I've also heard of using Rock Salt. But I'm not completely comfortable with that idea. Opinions helpful. Thank you in advance.
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01-22-2016, 05:24 PM
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#2
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Site Team
Join Date: Sep 2014
Location: Northen IL
Posts: 8,329
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It certainly wouldn't hurt anything, but if you are actively using it, I don't know how much good it would do. It would get diluted pretty quickly.
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01-22-2016, 05:52 PM
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#3
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Senior Member
Join Date: Jul 2010
Location: Waynesville
Posts: 14,428
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Quote:
Originally Posted by Iwritecode
It certainly wouldn't hurt anything, but if you are actively using it, I don't know how much good it would do. It would get diluted pretty quickly.
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Agree 100%!  Youroo!! 
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01-22-2016, 06:00 PM
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#4
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Senior Member
Join Date: Jul 2010
Location: Waynesville
Posts: 14,428
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You dont/cant say where you are but your unit is Only a 3 season unit! It has to have drastic Mods to be used in COLD weather! There are certain places/times in the USA that it will NOT be livable,in regards to WATER system! Youroo!!
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01-22-2016, 06:17 PM
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#5
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Senior Member
Join Date: Oct 2014
Posts: 981
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When we used the Kenworth Motor Home all winter for snowmobileing in the UP of Mi I would dump about a quart of rocksalt in right after dumping.This will be washed to the low part of the tank (valve) and protect it from freezeing.There were 4 of us,wife and 2 kids,so after a day of use,I would add a gal of RV antifreeze.After that I added another quart of rock salt for every15 -20 flushes.There was a log (no pun) in the bathroom that would be after updated after each flush.There was a "#1 and # 2 " colume to check,so I had exact knowledge of what went in the tank. The thing about doing the rock salt thing is that if the toilet drops straight into the tank,there is no problem.If the line to the tank is a long horizontal run,dribble the rock salt in so the flush water can carry it away.In 10 years of winter use,which included 3 years on a perminant site in Indian River Mi,we never had any problems. I put 1 gal of antifreeze in the grey tank after draining but we used the grey sparingly,maybe for a hand wash in the toilet,but showers were at the camp facility (if it was open) or we just stunk for 3 days! What few dishes we had were done in a pan and tossed out the door.Styrofoam bowls,cups and plastic flatware most of the time.I built the MH with a basement that housed the fresh water tank and I ran the ducted heat trunk directly under it,so no problem there. Hopes this helps!
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01-23-2016, 12:48 PM
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#6
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Senior Member
Join Date: Jun 2011
Posts: 251
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I would "think" that the heat from "BW"waster would prevent/deter freezing? I agree that the antifreeze wold end up being so diluted to render it useless. Rock Salt? can't be good for the seals can it?
I would help if you have enclosed and heated tanks. Heated tank kits are available as an aftermarket install.
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Jim & Pam
2017 Ram 3500, Crew Cab Diesel Dually
2014 Hemisphere 327res
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01-23-2016, 01:28 PM
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#7
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Who Dares, Wins
Join Date: May 2012
Location: Chester County, PA
Posts: 7,063
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I always though the same about the heat... But I still poor some AF in when all is said and done.
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Pat, Jen, Heather & Sapphire, the head mouser.
2015 Chevy HD D-Max
2022 Impression 315MB
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01-23-2016, 02:09 PM
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#8
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Senior Member
Join Date: May 2014
Location: Halifax Nova Scotia Canada
Posts: 833
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-40*C windshield washer is cheaper
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01-23-2016, 02:14 PM
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#9
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Who Dares, Wins
Join Date: May 2012
Location: Chester County, PA
Posts: 7,063
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I have done that as well... That is actually what I use in my drains and tanks usually (NOT IN THE DRINKING LINES!!) but the Walmart had the AF cheaper when I bought it.
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Pat, Jen, Heather & Sapphire, the head mouser.
2015 Chevy HD D-Max
2022 Impression 315MB
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01-23-2016, 02:56 PM
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#10
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Senior Member
Join Date: Jul 2015
Posts: 7,053
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Dump some calcium chloride in there.
Bruce
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2016 Rockwood Windjammer 3029W Diamond Edition
2015 Chevy 3500HD LTZ 6.0 Crew Cab 4x4 Long Bed 4.10:1 SRW
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01-24-2016, 09:01 AM
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#11
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Senior Member
Join Date: Jul 2014
Location: SouthWest Michigan
Posts: 5,977
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I wonder if regular auto AF could be used in Gray & Black tanks ???
It is made to be diluted !!!
COST ???
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01-24-2016, 09:18 AM
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#12
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Senior Member
Join Date: Sep 2013
Location: Idaho
Posts: 9,839
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Quote:
Originally Posted by Wolverine 1945
I wonder if regular auto AF could be used in Gray & Black tanks ???
It is made to be diluted !!!
COST ???
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Last automotive A/F I looked at WAS already a 50/50 mix, I imagine they are trying to keep the price point lower.
Not sure about the EPA regulations now but at one point Automotive A/F was a hazardous material so dumping it into a sewer system was a bad idea.
__________________
2016 F350 6.7L LB CC Reese 28K 2014 Chaparral Lite 266sab
"Those who would give up essential Liberty, to purchase a little temporary Safety, deserve neither Liberty nor Safety." 2014 19 days camping 2015 17 days camping201620 days camping
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01-24-2016, 09:35 AM
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#13
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Who Dares, Wins
Join Date: May 2012
Location: Chester County, PA
Posts: 7,063
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It is pretty toxic stuff, if it is drank it can crystallize the kidneys.. Then you die. Kills lots of pets each year... I'd stick to something else.
__________________
Pat, Jen, Heather & Sapphire, the head mouser.
2015 Chevy HD D-Max
2022 Impression 315MB
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01-24-2016, 09:41 AM
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#14
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Senior Member
Join Date: Jul 2014
Location: SouthWest Michigan
Posts: 5,977
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Quote:
Originally Posted by Ford Idaho
Last automotive A/F I looked at WAS already a 50/50 mix, I imagine they are trying to keep the price point lower.
Not sure about the EPA regulations now but at one point Automotive A/F was a hazardous material so dumping it into a sewer system was a bad idea.
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Your probably right Ford !!!
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01-24-2016, 11:00 AM
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#15
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Senior Member
Join Date: Oct 2014
Posts: 981
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It is against federal law to dump any form or ammount of ethelene glycol Engine antifreeze) in any watershed,on the ground,in any sewer system or in any waterway.I was in the marina business for quite a few years and when we were winterizeing boatsthe coasties would stop for a visit every week or so and sample the AF we used.We bought 100% (undiluted) polypropelene glycol ,slush point -200 deg f )and diluted it to schive a -20 deg slush point.This we used in engines,water systems got rv watersystem af.Thecoasties would come around in the spring too and check to see what was comming out of the exhaust when we started up boats that were winterized.The 100% polypropelene is what I jugged uo and used in my black/grey tanks because it was free,and could be diluted down as far as 400% and still have a slush point of around + 10 deg.
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