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01-05-2018, 01:11 PM
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#1
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Senior Member
National RV Owners Club
Join Date: Jun 2015
Location: florence, Ky
Posts: 166
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is it ok to dump tanks in 20*F weather?
My wet bay is heated to 70* and my dump valves remain closed until time to dump. The sewer hose is sloped downhill with no 'trap' bends. I'm full timing and the grey tank just filled up this morning and I've got three more days of 20* highs but need to dump. Takes about 5 minutes for each tank.
Would it be safe to dump or can the 15' hose freeze and should I wait until temp gets above freezing before I dump? (Cat is already wrinkling her nose at me.)
__________________
Bud
1998 National Dolphin 36' 5360 GM with tag axle.
Using my segway for a toad.
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01-05-2018, 01:18 PM
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#2
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Senior Member/RVM #90
Monaco Owners Club
Join Date: Nov 2002
Location: Columbus, MS
Posts: 54,758
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__________________
Joe & Annette
Sometimes I sits and thinks, sometimes I just sits.....
2002 Monaco Windsor 40PBT, 2013 Honda CRV AWD
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01-05-2018, 01:19 PM
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#3
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Senior Member
Join Date: Oct 2017
Posts: 290
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5 minutes with moving liquids I think you will be fine... just keep 'em moving.
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01-05-2018, 01:19 PM
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#4
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Senior Member
Join Date: Mar 2015
Posts: 2,984
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I am full-timing at 7000' elevation in Flagstaff. We get real winters here. I leave the sewer hose connected all the time and dump the tanks whenever necessary. Never a problem.
__________________
'04 Newmar Mountain Aire 4016
400ISL/Freightliner
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01-05-2018, 01:20 PM
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#5
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Member
Join Date: Aug 2017
Posts: 86
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I really know for sure to dump or not. But, I myself would do the dump.
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01-05-2018, 01:53 PM
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#6
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Senior Member
National RV Owners Club
Join Date: Jun 2015
Location: florence, Ky
Posts: 166
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Thanks friends,
You're always here when I need you.
I'm dumping tonight and taking a hot shower.
I Love living in the motorhome in the winter... nice and cozy.
Bud
__________________
Bud
1998 National Dolphin 36' 5360 GM with tag axle.
Using my segway for a toad.
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01-05-2018, 02:09 PM
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#7
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Senior Member
Winnebago Owners Club Freightliner Owners Club
Join Date: Jun 2013
Location: 5 miles south of Lakeville, Mn
Posts: 3,047
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If the liquid is 70 degrees it certainly won't chill enough to freeze in the time it takes to dump. Besides, you really need a shower.
__________________
Jim and Carol Cooper with Oreo the Kitty
FAA ATC ret, VFW, AL, VVA, NRA
US Army Aviation, MACV Vietnam 65-66
2012 Journey 36M, Cummings 360hp
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01-05-2018, 03:10 PM
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#8
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Senior Member
National RV Owners Club
Join Date: Jun 2015
Location: florence, Ky
Posts: 166
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Quote:
Originally Posted by Cooperhawk
If the liquid is 70 degrees it certainly won't chill enough to freeze in the time it takes to dump. Besides, you really need a shower.
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Flash the cat agrees with you.
Thanks
__________________
Bud
1998 National Dolphin 36' 5360 GM with tag axle.
Using my segway for a toad.
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01-05-2018, 04:22 PM
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#9
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Senior Member
Country Coach Owners Club
Join Date: Jan 2014
Location: Medford, OR
Posts: 744
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No problem....DUMP IT
__________________
2007 42' Country Coach Intrigue #12149 CAT C-13, 2014 SRX, Roadmaster Sterling, SMI AirForceOne
FMCA, Good Sam, CCFI, CCI, NWCC
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01-05-2018, 04:50 PM
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#10
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Senior Member
Join Date: Jan 2016
Posts: 531
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Quote:
Originally Posted by bud01234
I'm dumping tonight and taking a hot shower.
Bud
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Don't forget to empty your tanks, too.
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01-05-2018, 06:49 PM
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#11
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Senior Member
Join Date: Dec 2013
Location: Lake Havasu City, AZ & Plover, WI
Posts: 6,403
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Stop to think about it. The hose is empty and you are going to dump 70* fluid into a 3" plastic hose. It will probably warm the hose up to close to 60* by the time your tanks are empty. You could probably dump with an OAT of zero or below and it still wouldn't freeze up if the slope is as you say and the hose emptied when the flow was over.
__________________
2006 Monaco Executive 44 Denali
2013 43 QGP Allegro Bus ( SOLD )
2013 Avalanche
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01-05-2018, 06:57 PM
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#12
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Senior Member
Join Date: Aug 2013
Location: Cincinnati, OH
Posts: 849
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As many previous replies stated, since your tanks are above freezing, no problems. Only potential problem i might identify is if you have a long run from the tanks to the valves, that smaller pipe (2-3 inch) could be frozen and prevent draining. But as long as liquid to the valve, you will have no problem.
__________________
2017 Renegade Verona 36 VSB
2005 Kenworth Showhauler truck conversion. sold .
I used to have a handle on life, but it broke
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01-06-2018, 09:10 AM
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#13
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Senior Member
National RV Owners Club
Join Date: Jun 2015
Location: florence, Ky
Posts: 166
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Hi again Folks,
Just a follow-up... The dump operation went fine, so I went inside and took my hot shower. As I walked down the hallway, I glanced at my remote wet bay temperature probe read-out:
31*F !!! Yikes!!!!
I ran outside and opened up the wet bay and my little Walmart 3amp heater was OFF. I flipped it back on and it made a very unhappy squealing sound so I quickly turned it off, flipped on my emergency heat lamp then made a quick run to Walmart and bought another heater (on sale for $10).
Got back and plugged in the heater, buttoned up the wet bay and within 15 minutes the probe was reading *60F. Whew! The outside temp had dropped to 8*f and it was -2*F when I got up this morning. The wet bay was a balmy *71F.
This could have been a disaster! Glad I glance at the wet bay temp frequently.
Incidently, Flash the cat is sleeping with me again.
__________________
Bud
1998 National Dolphin 36' 5360 GM with tag axle.
Using my segway for a toad.
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01-07-2018, 12:55 AM
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#14
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Senior Member
Join Date: Mar 2017
Location: Zebulon, NC
Posts: 5,211
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It would take many hours at 31F for your tanks to freeze, if they even froze at all. Water doesn't freeze solid in an instant or a few minutes.
To better learn your system, get an infrared thermometer and check your temps in many places.
As of this Sunday afternoon, we will have gone through 7 complete days below freezing and several nights in low teens and was 4F above at 0700 Saturday morning. I have a 1500 watt oil filled heater in the coach set at 65 (lowest it will go) and the furnace at 55F. All of my internal plumbing has not gone below 43F including the fresh water tank under the bed.
My uninsulated and unheated wet bay is a different story. My tanks are completely empty right now except for about 1.5 gallons of RV anti-freeze in both to protect the valves. I did have a little waste in the tanks and the tank heaters kept the tank portion at 35F at the water line and the air temp above was warmer, however that did not hold true for the valves. As the waste lines came out of the tank, the temp dropped rapidly getting to air temp (17F) at the drain side of the valves. I put a 120A / 75W light under the bay with the hatch cover open and the 5 gallon bucket flush to the bottom of the bay. The connector for the drain warmed nicely, but not the valve or tank side plumbing. My bay is too small to put in a heater. I am going to try this again with a heat lamp bulb.
In the last week have used this artic freeze to learn more about my coach and water systems than I probably would have been able to learn in 5 years. We brought this one home in the first week of March 2017, and I was freaking out at lows in the mid-upper 20s. Now I know better what I need to do. During the summer, I will work on making the water draining process easier and more complete if I feel the need to drain it (but I probably won't).
__________________
Kelly and Jerry Powell with Halo (Lethal White Aussie), Nash the Rat Terrorist, and now Reid, the "Brindle we have no idea puppy"
2020 Grand Design Solitude 390RK-R
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