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08-30-2020, 03:01 PM
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#1
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Junior Member
Join Date: Aug 2014
Location: Fredericksburg
Posts: 20
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Freshwater holding tank
I recently went to fill my freshwater holding tank and it began to backfill well before it was possibly full. Additionally I checked the gauge inside and it showed empty. When I opened the low point drain valve water stopped flowing out within a couple of minutes. Any have any ideas???
Thanks
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08-30-2020, 03:05 PM
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#2
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Site Team
Join Date: Apr 2012
Location: Newark, NY
Posts: 15,883
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Do you have two tanks underneath?
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Moderator
Think you're too old to cry or swear out loud...walk into your hitch in the dark.
2012 Jay Flight 19RD
2016 Ford F150 XLT 2X4 SC 3.5L Eco Max Tow
2010 Tundra TRD DBL Cab (Traded)
2 new fluffy Corgis, Bayley and Stanley
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08-30-2020, 05:03 PM
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#3
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Senior Member
Join Date: Sep 2019
Location: Lowell
Posts: 243
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Not sure if our has one but possible a bad check valve.
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2019 Jayco Eagle HT 30.5MLOK
2002 F250 SD CC 4X4 7.3PSD
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08-30-2020, 05:19 PM
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#4
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Junior Member
Join Date: Aug 2014
Location: Fredericksburg
Posts: 20
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I have a single freshwater tank as far as I know. The bottom of the trailer is covered so I can’t see
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08-30-2020, 05:19 PM
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#5
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Junior Member
Join Date: Aug 2014
Location: Fredericksburg
Posts: 20
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Ok. Thanks
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08-30-2020, 06:00 PM
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#6
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Senior Member
Join Date: Dec 2015
Location: Pennsylvania
Posts: 1,880
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How many overflow tubes do you see sticking out?
I have 2 tanks and 2 overflow tubes sticking out from under the chloroplast.
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2012 Ford Expedition EL
2016 28BHBE, Elite and Thermal Packages.
Equal-i-zer 4-point Sway Control, Southwire 34930 Surge Guard 30A, Tire Minder TPMS A1A
(2) Yamaha EF2000iS Generators, Micro-Air EasyStart™ 364 (3-ton) Soft Start, Garmin RV 890, GoodYear Endurance ST225/75-15 Load Range E
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08-30-2020, 06:28 PM
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#7
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Junior Member
Join Date: Aug 2014
Location: Fredericksburg
Posts: 20
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I don’t have any. I have a low point drain in front of the tank.
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08-30-2020, 06:32 PM
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#8
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Senior Member
Join Date: Sep 2019
Location: Lowell
Posts: 243
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There is a overflow under the rv. Never seen one that hasn’t. What model and brand is the rv?
__________________
2019 Jayco Eagle HT 30.5MLOK
2002 F250 SD CC 4X4 7.3PSD
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08-30-2020, 06:39 PM
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#9
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Senior Member
Join Date: Sep 2019
Location: Lowell
Posts: 243
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Just thought of something. Some don’t have a overflow under. Is your a gravity fill tank? Some of those have a overflow / vent tube beside the fill port. If that overflow/vent tube is plugged it can cause that but usually they will take several gal of water before you get back pressure.
__________________
2019 Jayco Eagle HT 30.5MLOK
2002 F250 SD CC 4X4 7.3PSD
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08-30-2020, 07:11 PM
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#10
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Senior Member
Join Date: Apr 2020
Location: Port Charlotte FL/Hinsdale MA.
Posts: 1,070
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your FW tank must have a vent/overflow line and a drain line. Low point drains are not part of the FW tank.
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Retired Master Electrician and Building Inspector.
2011 Keystone Sprinter 323 BH
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08-30-2020, 07:50 PM
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#11
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Senior Member
Join Date: Dec 2012
Location: Southern Indiana
Posts: 3,208
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Quote:
Originally Posted by Cavie
your FW tank must have a vent/overflow line and a drain line. Low point drains are not part of the FW tank.
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The fresh water drain tank quarter turn valves on my '12 Eagle are labeled as "low point drains'' on the side of my camper. Not sure why as my actual low point drains that drain the plumbing located on the other side of the camper are labeled the same. This causes newby confusion, as it did me some years ago.
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2012 Eagle 320 RLDS
2017 Ford F-250 FX4 Crew STX 6.2l
3.73 E-locker
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08-30-2020, 08:05 PM
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#12
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Site Team
Join Date: Apr 2012
Location: Newark, NY
Posts: 15,883
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My tank drains are labeled as "low point" also. Never noticed that minor detail before this year. Farther forward are the actual low point drain tubes, and they're labeled the same, but those valves are inside. Technically, they are indeed both low.
__________________
Moderator
Think you're too old to cry or swear out loud...walk into your hitch in the dark.
2012 Jay Flight 19RD
2016 Ford F150 XLT 2X4 SC 3.5L Eco Max Tow
2010 Tundra TRD DBL Cab (Traded)
2 new fluffy Corgis, Bayley and Stanley
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08-30-2020, 08:05 PM
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#13
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Senior Member
Join Date: Apr 2020
Location: Port Charlotte FL/Hinsdale MA.
Posts: 1,070
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Quote:
Originally Posted by TCNashville
The fresh water drain tank quarter turn valves on my '12 Eagle are labeled as "low point drains'' on the side of my camper. Not sure why as my actual low point drains that drain the plumbing located on the other side of the camper are labeled the same. This causes newby confusion, as it did me some years ago.
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These things are built by people how can't flip burgers.
__________________
Retired Master Electrician and Building Inspector.
2011 Keystone Sprinter 323 BH
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08-30-2020, 08:47 PM
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#14
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Senior Member
Join Date: Dec 2015
Location: Pennsylvania
Posts: 1,880
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Low point drains are NOT over flow tubes!
__________________
2012 Ford Expedition EL
2016 28BHBE, Elite and Thermal Packages.
Equal-i-zer 4-point Sway Control, Southwire 34930 Surge Guard 30A, Tire Minder TPMS A1A
(2) Yamaha EF2000iS Generators, Micro-Air EasyStart™ 364 (3-ton) Soft Start, Garmin RV 890, GoodYear Endurance ST225/75-15 Load Range E
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08-30-2020, 09:00 PM
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#15
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Senior Member
Join Date: Oct 2018
Location: Colorado Springs
Posts: 1,270
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Sounds to me like there are some other valves turned the wrong way or those valves quarter turn to some other function.
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08-31-2020, 07:14 AM
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#16
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Junior Member
Join Date: Aug 2014
Location: Fredericksburg
Posts: 20
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So would having a freshwater valve turned the wrong way prevent the tank from filling?
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08-31-2020, 08:21 AM
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#17
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Senior Member
Join Date: Sep 2019
Location: Lowell
Posts: 243
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Do you have a valve where your filling that says city water / tank fill. If so yes it has to be turned to tank fill.
__________________
2019 Jayco Eagle HT 30.5MLOK
2002 F250 SD CC 4X4 7.3PSD
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08-31-2020, 08:24 AM
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#18
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Senior Member
Join Date: Oct 2018
Location: Colorado Springs
Posts: 1,270
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Mine has other valves that connect to the same pipe going towards the to tank. It takes a combination of valves in the correct position.
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08-31-2020, 08:45 AM
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#19
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Junior Member
Join Date: Aug 2014
Location: Fredericksburg
Posts: 20
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I will check
Thanks
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08-31-2020, 08:46 AM
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#20
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Junior Member
Join Date: Aug 2014
Location: Fredericksburg
Posts: 20
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Ahh. Ok that makes sense. I will check it out
Thanks!
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