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07-07-2020, 06:25 PM
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#1
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Junior Member
Join Date: Jun 2020
Location: Billings
Posts: 6
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Please Help Identifying These Water Lines
We recently purchased a 2015 Keystone Cougar Travel Trailer. We've taken it out a few times and I've become quite familiar with it. However, there's one thing (currently) that I can't identify. In the picture below you will see two drain lines. One red, presumably hot, and one blue, presumably cold. What do they drain. I opened both after our most recent five-day outing and only a few ounces of pink RV anti-freeze flowed out and nothing else. They are located, roughly, below the location of the shower in the bathroom. I can see no place inside, that is accessible, where there would be a bypass valve of any sort. I'm stumped. The single one you see in the background is the fresh-water tank drain.
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07-07-2020, 06:30 PM
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#2
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Site Team
Join Date: Feb 2014
Location: W. Texas
Posts: 17,692
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Those are the low point drains for hot (red) and cold (blue) water lines.
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Danny and Susan, wife of 56 years
2019 Ram 3500 Laramie CC SWB SB 6.4 4x4 4.10
2020 Montana High Country 331RL
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07-07-2020, 06:32 PM
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#3
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Senior Member
Join Date: Oct 2019
Location: Central FL
Posts: 1,090
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They are low point drains for hot and cold water lines. Bypass valve would be near the water heater.
Welcome, by the way. 
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07-07-2020, 06:33 PM
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#4
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Site Team
Join Date: Jul 2014
Location: Modesto
Posts: 20,345
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As Danny said, they are the low point drains. They will allow all the water in the fresh water system to drain out by gravity as long as you open all the faucets. It WILL Not drain the fresh water tank. The fresh tank will have its own drain.
__________________
2012 Copper Canyon 273FWRET being towed by a 1994 Ford F350 CC,LB,Dually diesel.
Airlift 5000 bags, Prodigy brake control, 5 gauges on the pillar.Used to tow a '97 Jayco 323RKS.
Now an RVIA registered tech. Retired from Law enforcement in 2008 after 25+ yrs.
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07-07-2020, 06:34 PM
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#5
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Senior Member
Join Date: Oct 2019
Location: Central FL
Posts: 1,090
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Quote:
Originally Posted by Bill-2020
They are low point drains for hot and cold water lines. Bypass valve would be near the water heater.
Welcome, by the way. |
Two minutes too late - Danny types fast than i do. HAHAHA!
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07-07-2020, 06:34 PM
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#6
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Junior Member
Join Date: Jun 2020
Location: Billings
Posts: 6
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Quote:
Originally Posted by sourdough
Those are the low point drains for hot (red) and cold (blue) water lines.
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That is what I assumed; but, what do they drain? I don't mean to sound obtuse; but, we had just returned from camping and using every plumbing fixture in the camper and I decided to open them, assuming they would drain all of the water remaining in the lines. Nothing other than the aforementioned few ounces of antifreeze came out. I would assume that they would drain all of the hot and cold lines that had water in them. However, I just had a little tiny bit of antifreeze.
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07-07-2020, 06:38 PM
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#7
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Senior Member
Join Date: Nov 2017
Location: Picacho, Az
Posts: 6,809
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Quote:
Originally Posted by BigSky!
That is what I assumed; but, what do they drain? I don't mean to sound obtuse; but, we had just returned from camping and using every plumbing fixture in the camper and I decided to open them, assuming they would drain all of the water remaining in the lines. Nothing other than the aforementioned few ounces of antifreeze came out. I would assume that they would drain all of the hot and cold lines that had water in them. However, I just had a little tiny bit of antifreeze.
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Unless you opened faucets inside they wouldn't do anything but dribble a second. Open all the hot/cold faucets then open the low point drains.
__________________
Full-timed 10+ years
Sold '13 Redwood FB
Traded '13 GMC Denali DRW D/A
Replacement undetermined
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07-07-2020, 06:40 PM
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#8
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Site Team
Join Date: Jul 2014
Location: Modesto
Posts: 20,345
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Quote:
Originally Posted by travelin texans
Unless you opened faucets inside they wouldn't do anything but dribble a second. Open all the hot/cold faucets then open the low point drains.
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I guess nobody read my response? 
__________________
2012 Copper Canyon 273FWRET being towed by a 1994 Ford F350 CC,LB,Dually diesel.
Airlift 5000 bags, Prodigy brake control, 5 gauges on the pillar.Used to tow a '97 Jayco 323RKS.
Now an RVIA registered tech. Retired from Law enforcement in 2008 after 25+ yrs.
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07-07-2020, 06:42 PM
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#9
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Site Team
Join Date: Oct 2011
Location: Joppa, MD
Posts: 11,752
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The antifreeze was most likely what was setting in the section of pipe from the pipe connection to the cap. It won't drain out rapidly unless all the faucets are opened to let air in. To see how it works stick a straw in a glass of liquid. Place your finger over the open straw and pull the straw out of the glass. The liquid will stay in the straw until you remove your finger and allow air to replace the liquid.
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Marshall
2012 Laredo 303 TG
2010 F250 LT Super Cab, long bed, 4X4, 6.4 Turbo Diesel
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07-07-2020, 06:46 PM
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#10
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Senior Member
Join Date: Jul 2017
Location: Monroeville
Posts: 1,550
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Weirdly enough, very little comes out of my cold line drain unless I have a faucet on and the hot water heater drain plug removed. If I open my lines and just turn on a faucet or two it will drain a little (more than what OP had, but not a complete drain), but if I drain the HW tank at the same time it will drain gallons. Does not make any sense, I know.
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2014 Bullet Premier 29bh in Charocal
2019 Ram 2500 HD 4x4, CC, 6.4L
2011 Passport 2510RB (Sold)
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07-07-2020, 06:49 PM
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#11
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Junior Member
Join Date: Jun 2020
Location: Billings
Posts: 6
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Thank you all for the input. My previous trailers never had these. So I get it now and I appreciate all of the responses. I suppose this will aid in my winterization.
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07-07-2020, 06:52 PM
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#12
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Site Team
Join Date: Oct 2011
Location: Joppa, MD
Posts: 11,752
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Quote:
Originally Posted by Gegrad
Weirdly enough, very little comes out of my cold line drain unless I have a faucet on and the hot water heater drain plug removed. If I open my lines and just turn on a faucet or two it will drain a little (more than what OP had, but not a complete drain), but if I drain the HW tank at the same time it will drain gallons. Does not make any sense, I know.
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Larger hole, more air. If you've ever taken out the faucet screens to clean them they typically have a disc with a small hole for the water to come out before hitting the aerator. Some call it a "water saver". Opening the tub and outdoor shower faucets will drain it quicker also. I open all faucets, uncap the drains and apply about 15 psi of air pressure when I winterize. That speeds things up.
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Marshall
2012 Laredo 303 TG
2010 F250 LT Super Cab, long bed, 4X4, 6.4 Turbo Diesel
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07-08-2020, 03:40 AM
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#13
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Senior Member
Join Date: Oct 2016
Location: Commerce Twp, Mi
Posts: 1,002
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__________________
TOM
2011 Chevy Silverado
1500, HD Tow Package
2017 Keystone Hideout 177LHS Carlisle Radial HDs
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07-08-2020, 07:18 AM
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#14
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Site Team
Join Date: Oct 2011
Location: Joppa, MD
Posts: 11,752
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Quote:
Originally Posted by chuckster57
I guess nobody read my response? |
OP came back in question #6 so apparently he didn't understand.
__________________
Marshall
2012 Laredo 303 TG
2010 F250 LT Super Cab, long bed, 4X4, 6.4 Turbo Diesel
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07-08-2020, 07:44 AM
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#15
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Site Team
Join Date: Jul 2014
Location: Modesto
Posts: 20,345
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It’s all good!! As long as the OP got his answer.
__________________
2012 Copper Canyon 273FWRET being towed by a 1994 Ford F350 CC,LB,Dually diesel.
Airlift 5000 bags, Prodigy brake control, 5 gauges on the pillar.Used to tow a '97 Jayco 323RKS.
Now an RVIA registered tech. Retired from Law enforcement in 2008 after 25+ yrs.
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07-08-2020, 08:36 AM
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#16
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Senior Member
Join Date: Jul 2017
Location: Monroeville
Posts: 1,550
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Quote:
Originally Posted by flybouy
Larger hole, more air. If you've ever taken out the faucet screens to clean them they typically have a disc with a small hole for the water to come out before hitting the aerator. Some call it a "water saver". Opening the tub and outdoor shower faucets will drain it quicker also. I open all faucets, uncap the drains and apply about 15 psi of air pressure when I winterize. That speeds things up.
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Ah, ok, that makes sense. I was thinking about it from a "HW heater open helps the cold system drain?" angle, but that explains it.
__________________
2014 Bullet Premier 29bh in Charocal
2019 Ram 2500 HD 4x4, CC, 6.4L
2011 Passport 2510RB (Sold)
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07-10-2020, 08:44 AM
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#17
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Site Team
Join Date: Mar 2011
Location: Gaylord
Posts: 26,996
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Quote:
Originally Posted by Gegrad
Weirdly enough, very little comes out of my cold line drain unless I have a faucet on and the hot water heater drain plug removed. If I open my lines and just turn on a faucet or two it will drain a little (more than what OP had, but not a complete drain), but if I drain the HW tank at the same time it will drain gallons. Does not make any sense, I know.
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Just curious, but have you tried opening the pressure relief valve to see if it does the same thing as removing the anode rod? Seems like either "should" relieve the vacuum and allow the low point drains to flow...
__________________
John
2015 F250 6.7l 4x4
2014 Cougar X Lite 27RKS
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