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07-29-2019, 12:40 PM
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#1
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Marshmallow Expert
Join Date: May 2012
Location: Medford, OR
Posts: 89
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Fresh water drain wonky?
I have had trouble draining my fresh water tank, so I decided to investigate and found what you see in the picture . I’m no engineer, but water typically flows downhill. I guess if the tank was full enough the weight of the water would push it over the hump, but mine only has a few gallons and isn’t going anywhere. The tank is located inside on the floor under the bed, not in the undercarriage, BTW.
Was mine put together by a rookie, made on a Monday by an employee with a hangover, or is there a genuine reason it was made this way?
__________________
Rick & Stephanie
2019 Toyota Tundra Crewmax TRD Sport
2018 Salem Cruise Lite 241QBXL
Whenever I feel blue, I start breathing again.
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07-29-2019, 12:47 PM
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#2
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Senior Member
Join Date: Jul 2017
Location: Georgia
Posts: 581
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We sure the one circled is the drain? Have a drain, supply, and pump feed line. sure which is which?
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07-29-2019, 12:51 PM
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#3
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Senior Member
Join Date: Aug 2017
Posts: 606
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What is the line to the left for? I see the inlet fill line but why is there three lines?
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07-29-2019, 12:51 PM
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#4
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Pickin', Campin', Mason
Join Date: Aug 2015
Location: South Western PA
Posts: 19,149
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Wait... what?!
I have no clue why it is plumbed that way.
Also looks like your pump suction line is kinked 1/2 shut too!
You sure you have them identified properly? It wouldn't matter about the rise in the plumbing if that one goes to the pump
__________________
2022 Cedar Creek 345IK 5th Wheel•Solar & Inverter•2024 Ford F-Series SCREW•7.3L•4x4•Factory Puck•B&W Companion•TST Tire Monitor w/Repeater•Sinemate 3500w Gen.
F&AM Lodge 358 Somerset, PA - JAFFA Shrine - Altoona, PA
Days Camped ☼ '19=118 ☼ '20=116 ☼ '21=123 ☼ '22=134 ☼ '23=118☼ '24=90
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07-29-2019, 01:03 PM
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#5
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Marshmallow Expert
Join Date: May 2012
Location: Medford, OR
Posts: 89
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100% sure
Quote:
Originally Posted by gbaldwin
We sure the one circled is the drain? Have a drain, supply, and pump feed line. sure which is which?
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The line circled is definitely the drain, I had my wife jiggle it inside while I looked underneath and watched the drain valve move up and down. The hose closest to the front of the pic is the feed line to the pump, and the line above the circled drain hose is the vent.
__________________
Rick & Stephanie
2019 Toyota Tundra Crewmax TRD Sport
2018 Salem Cruise Lite 241QBXL
Whenever I feel blue, I start breathing again.
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07-29-2019, 01:05 PM
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#6
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Senior Member
Join Date: Jul 2017
Location: North of Seattle, WA
Posts: 17,359
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Quote:
Originally Posted by MSgt Rick
I have had trouble draining my fresh water tank, so I decided to investigate and found what you see in the picture . I’m no engineer, but water typically flows downhill. I guess if the tank was full enough the weight of the water would push it over the hump, but mine only has a few gallons and isn’t going anywhere. The tank is located inside on the floor under the bed, not in the undercarriage, BTW.
Was mine put together by a rookie, made on a Monday by an employee with a hangover, or is there a genuine reason it was made this way?
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I certainly can't see any logical reason.
Also can't see any reason why it couldn't be straightened in order to more fully drain tank.
It will take a Psychic to figure out what was going through the mind of the installer. I could see the right angles if the hose(s) were horizontal and the installer was trying to get around a structural component but this?
One note, if the tank was full and you opened the drain this whatever it is would siphon the water out of the tank only stopping when water got to the level of the inlet and air broke the siphon effect. But WHY???
__________________
"A wise man can change his mind. A fool never will." (Japanese Proverb)
"You only grow old when you run out of new things to do"
2018 Flagstaff Micro Lite 25BDS
2023 f-150 SCREW XLT 3.5 Ecoboost (The result of a $68,000 oil change )
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07-29-2019, 01:07 PM
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#7
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Senior Member
Join Date: Jul 2017
Location: North of Seattle, WA
Posts: 17,359
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Quote:
Originally Posted by 5picker
Wait... what?!
I have no clue why it is plumbed that way.
Also looks like your pump suction line is kinked 1/2 shut too!
You sure you have them identified properly? It wouldn't matter about the rise in the plumbing if that one goes to the pump
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No big deal as long as it will flow 3-3.5 gallons per minute. That's about max for a pump but it does indicate that whoever plumbed this was "challenged".
__________________
"A wise man can change his mind. A fool never will." (Japanese Proverb)
"You only grow old when you run out of new things to do"
2018 Flagstaff Micro Lite 25BDS
2023 f-150 SCREW XLT 3.5 Ecoboost (The result of a $68,000 oil change )
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07-29-2019, 01:12 PM
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#8
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Pickin', Campin', Mason
Join Date: Aug 2015
Location: South Western PA
Posts: 19,149
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Quote:
Originally Posted by TitanMike
No big deal as long as it will flow 3-3.5 gallons per minute. That's about max for a pump but it does indicate that whoever plumbed this was "challenged".
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Agreed... but I've see a good pump suck a 1/2 kinked line completely shut.
May as well fix that while you're fixing.
__________________
2022 Cedar Creek 345IK 5th Wheel•Solar & Inverter•2024 Ford F-Series SCREW•7.3L•4x4•Factory Puck•B&W Companion•TST Tire Monitor w/Repeater•Sinemate 3500w Gen.
F&AM Lodge 358 Somerset, PA - JAFFA Shrine - Altoona, PA
Days Camped ☼ '19=118 ☼ '20=116 ☼ '21=123 ☼ '22=134 ☼ '23=118☼ '24=90
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07-29-2019, 01:12 PM
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#9
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Senior Member
Join Date: Jul 2014
Location: Hawkins, Texas
Posts: 1,243
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Well since water with not of its own accord flow uphill, you will have to replumb the drain line here. But you will have to remove all of the complicated plumbing that the factory installer put in place to accomplish this. Just run the line straight out and then down a rather simple fix. But you have to wonder what this person was smoking when they did this.
__________________
Chuck & Sandra
Engineer/Teacher
2010 F350 CC 6.4
2015 Prime Time Sanibel 3601
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07-29-2019, 01:30 PM
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#10
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Senior Member
Join Date: Jul 2017
Location: North of Seattle, WA
Posts: 17,359
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Quote:
Originally Posted by clr
But you have to wonder what this person was smoking when they did this.
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Maybe his foot was in the way and he just plumbed around it.
__________________
"A wise man can change his mind. A fool never will." (Japanese Proverb)
"You only grow old when you run out of new things to do"
2018 Flagstaff Micro Lite 25BDS
2023 f-150 SCREW XLT 3.5 Ecoboost (The result of a $68,000 oil change )
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07-29-2019, 01:42 PM
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#11
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Senior Member
Join Date: Jul 2017
Location: Georgia
Posts: 581
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If thats the drain, I think it is impossible to drain. Other than pumping it into the grey or black tank via pump and faucet.
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07-29-2019, 01:58 PM
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#12
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Senior Member
Join Date: Jun 2012
Posts: 10,907
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Quote:
Originally Posted by gbaldwin
If thats the drain, I think it is impossible to drain. Other than pumping it into the grey or black tank via pump and faucet.
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It would not be impossible if the tank were full. If you start the drain when the tank is full, it should fill the top of the drain line and then create a siphon and drain the tank down until the drain connection becomes uncovered; it will then suck air and the siphon will be lost. In other words, it would drain the tank similarly to what many people's vent lines do when they are not routed correctly.
Any subsequent attempt to drain with the tank level below the top of the drain line would "probably" not work, depending on the amount of air/water remaining in the drain line.
__________________
1988 Coleman Sequoia - popup (1987-2009) - outlasted 3 Dodge Grand Caravans!
2012 Roo19 - hybrid (2012-2015)
2016 Mini Lite 2503S - tt (2015 - ???)
2011 Traverse LT, 3.6L, FWD
2009 Silverado 1500 Ext Cab, 5.3L, 4x4, 3.73
2016 Silverado 2500HD Dbl Cab, 6.0L 4x4, 4.10
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07-29-2019, 02:03 PM
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#13
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Marshmallow Expert
Join Date: May 2012
Location: Medford, OR
Posts: 89
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Quote:
Originally Posted by TitanMike
Maybe his foot was in the way and he just plumbed around it.
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Haha, I do believe you have come up with the only plausible reason!
The kink in the feed tube actually looks worse in the picture, so no worries on that.
I just fixed the shattered roof vents and installed MaxxAir covers last weekend and was disappointed that I had nothing else to fix. Now I can re plumb the drain this weekend. Yay!!!
I better stock up on on repairman fluid (beer)
__________________
Rick & Stephanie
2019 Toyota Tundra Crewmax TRD Sport
2018 Salem Cruise Lite 241QBXL
Whenever I feel blue, I start breathing again.
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07-29-2019, 02:11 PM
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#14
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Senior Member
Join Date: Jul 2017
Location: Georgia
Posts: 581
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I conceed.... if draining a full tank (which I can not remember ever attempting.)
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07-29-2019, 02:13 PM
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#15
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Senior Member
Join Date: Jun 2012
Posts: 10,907
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Quote:
Originally Posted by gbaldwin
I conceed.... if draining a full tank (which I can not remember ever attempting.)
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I do it every spring when I chlorinate my tank. Don't you?
__________________
1988 Coleman Sequoia - popup (1987-2009) - outlasted 3 Dodge Grand Caravans!
2012 Roo19 - hybrid (2012-2015)
2016 Mini Lite 2503S - tt (2015 - ???)
2011 Traverse LT, 3.6L, FWD
2009 Silverado 1500 Ext Cab, 5.3L, 4x4, 3.73
2016 Silverado 2500HD Dbl Cab, 6.0L 4x4, 4.10
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07-29-2019, 02:21 PM
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#16
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Senior Member
Join Date: Jul 2017
Location: Georgia
Posts: 581
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Would have to really think about my chlorinating procedure with that drain. Quite a bit left in the bottom of that tank even in best case scenerio.
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07-29-2019, 02:22 PM
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#17
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Pickin', Campin', Mason
Join Date: Aug 2015
Location: South Western PA
Posts: 19,149
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Quote:
Originally Posted by gbaldwin
Would have to really think about my chlorinating procedure with that drain. Quite a bit left in the bottom of that tank even in best case scenerio.
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Again... not if you started the siphoning/draining when the tank was full.
__________________
2022 Cedar Creek 345IK 5th Wheel•Solar & Inverter•2024 Ford F-Series SCREW•7.3L•4x4•Factory Puck•B&W Companion•TST Tire Monitor w/Repeater•Sinemate 3500w Gen.
F&AM Lodge 358 Somerset, PA - JAFFA Shrine - Altoona, PA
Days Camped ☼ '19=118 ☼ '20=116 ☼ '21=123 ☼ '22=134 ☼ '23=118☼ '24=90
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07-29-2019, 02:42 PM
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#18
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Senior Member
Join Date: Jul 2017
Location: Georgia
Posts: 581
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ok
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07-29-2019, 03:51 PM
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#19
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Senior Member
Join Date: Jan 2018
Location: Raleigh, NC
Posts: 9,621
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Reuse one of the 90-degree elbows
Quote:
Originally Posted by clr
Well since water with not of its own accord flow uphill, you will have to replumb the drain line here. But you will have to remove all of the complicated plumbing that the factory installer put in place to accomplish this. Just run the line straight out and then down a rather simple fix. But you have to wonder what this person was smoking when they did this.
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Yup. Just re-use one of the 90-degree elbows, right where it goes through the floor.
__________________
Larry
"Everybody's RV is not like your RV."
"Always take pictures with the button on the right."
"Always bypass the water heater before opening the low-point drains."
Sticks and Bricks: Raleigh, NC
2008 Cherokee 38P: at Ivor, VA permanently
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07-29-2019, 04:13 PM
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#20
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RV There Yet?
Join Date: Jul 2018
Location: Winona, MN
Posts: 1,141
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I think this installer is a whole lot smarter than we are giving them credit for. they are teaching us a valuable lesson in physics using Pythagorean's Cup.
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2018 17RP
2009 Crew Cab King Ranch F150 "Goose"
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