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06-19-2021, 08:15 PM
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#1
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Junior Member
Join Date: Jul 2016
Location: Wherever we are at the moment
Posts: 26
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Finding leak in fresh water tank?
I seem to have a pretty good leak in my fresh water tank on my 05 HR Amb 40pdq. It's a 100 gallon tank, and from being totally filled, I can lose about half of the volume in 5 days...so about 10 gallons/day. It seems to be coming from the side of the tank towards the rear of the coach...of course, it is right against the wall so I cant tell for sure if that is where it is coming from. I have checked all connections and they are dry.
Any thoughts on figuring out where the leak is without removing the whole tank?
Thanks in advance.
__________________
Fulltimers since 6/2017: 2005 HR Ambassador 40PDQ,
MagnaSine 3K, 1K Solar, 412Ah SOK Lithium,
toad: 2015 C-Max Energi with Air Force One braking
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06-20-2021, 09:52 AM
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#2
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Senior Member
Join Date: Mar 2019
Location: Braidwood Il.
Posts: 8,300
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Do you happen to have a gravity fill. Owner just posted a cracked/rubbed fill hose ,it was attached about half way on tank port not the top. I know gravity fill is rare option.
__________________
95 Monaco Crown Royale
M11 400hp, 4060 trans.
Aquahot, Generac Guardian7.5k
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06-20-2021, 01:21 PM
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#3
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Senior Member
Join Date: Jun 2012
Location: NorCal
Posts: 3,000
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Have you checked your accumulator, mine had a pin hole leak, it was mounted in cargo bay ceiling, not easy to see.
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Outbound
2002 Monaco Executive 500 ISM
2004 GMC 2500HD 4X4
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06-20-2021, 01:37 PM
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#4
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Senior Member
Monaco Owners Club
Join Date: Aug 2017
Location: On the road
Posts: 1,915
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Take a paper towel and put 4-6" squares around where you think it might be leaking. They should narrow the area down.
Tim
__________________
Full Time 2000 Dynasty Regent FD, 8.3, Banks Turbo, 5" Diameter Exhaust, 475 HP 1425 Torque, FASS system, towing 05 Pilot 1500 Watts solar 800ah lithium & E-Bike
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06-20-2021, 07:11 PM
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#5
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Senior Member
Join Date: Nov 2014
Posts: 1,670
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My fresh water tank leak was as mentioned above the gravity fill hose.
If so? and you are replacing the hose I suggest using Permatex Clear RTV Silicone Adhesive Sealant on the connections and do not over tighten the clamps, so that you don't damage the hose nipple on the tank ..it is formed with the tank ( on mine ) and should you do so?...you could be in for quit and adventure.
I tried not using any sealer on the connections and was convinced I could make that work ...being warned by some others here it wont seal with just hose clamps. They were right clean the nipples and use the sealer mentioned tighten firm and you will be go to go should theis be your issue.
FYI at the point I did this job was when I first got my coach and I did not realize I could raise my coach above "Travel Mode" .... had I known this then as I do now that I could raise my coach up much higher I would have made fishing that fresh water fill hose thu the wheel well simple ....and not like trying to stuff a wet noodle up a wildcats a** in a phone booth
https://www.permatex.com/products/ad.../?locale=en_us
Happy Trails
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2004 HR Navagator 500 ISM
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06-21-2021, 12:31 AM
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#6
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Junior Member
Join Date: Jul 2016
Location: Wherever we are at the moment
Posts: 26
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Quote:
Originally Posted by 153stars
Do you happen to have a gravity fill. Owner just posted a cracked/rubbed fill hose ,it was attached about half way on tank port not the top. I know gravity fill is rare option.
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I do have a gravity fill, but it's on the opposite side from where the leak is, and all the connections are dry.
__________________
Fulltimers since 6/2017: 2005 HR Ambassador 40PDQ,
MagnaSine 3K, 1K Solar, 412Ah SOK Lithium,
toad: 2015 C-Max Energi with Air Force One braking
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06-21-2021, 12:34 AM
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#7
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Junior Member
Join Date: Jul 2016
Location: Wherever we are at the moment
Posts: 26
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Quote:
Originally Posted by Outbound
Have you checked your accumulator, mine had a pin hole leak, it was mounted in cargo bay ceiling, not easy to see.
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I guess I don't know what an accumulator is.... but the leak seems to be between the rear wall of the tank and the wall of the wet bay from what I can tell...or it could be on the bottom of the tank in that same area.
Depending on how level I am, the leaking water could drain toward either side of the RV.
__________________
Fulltimers since 6/2017: 2005 HR Ambassador 40PDQ,
MagnaSine 3K, 1K Solar, 412Ah SOK Lithium,
toad: 2015 C-Max Energi with Air Force One braking
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06-21-2021, 12:38 AM
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#8
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Junior Member
Join Date: Jul 2016
Location: Wherever we are at the moment
Posts: 26
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It doesn't seem to be the gravity fill hose...it continues to leak when well below the level where that hose enters the tank, and is not in the same area either.
__________________
Fulltimers since 6/2017: 2005 HR Ambassador 40PDQ,
MagnaSine 3K, 1K Solar, 412Ah SOK Lithium,
toad: 2015 C-Max Energi with Air Force One braking
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06-21-2021, 06:32 AM
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#9
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Senior Member
Join Date: Mar 2019
Location: Braidwood Il.
Posts: 8,300
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The accumulator is small bladder type tank on pressure side of fresh pump, like large bladder tanks for wells or small expansion tanks for water heaters . To rule out pressure side leak , go to fresh water pump, it will cycle when not using water. You may have already eliminated if leaks with no pressure or pump on., but just throwing it out there .
Quote:
Originally Posted by SkiMedicKC
I guess I don't know what an accumulator is.... but the leak seems to be between the rear wall of the tank and the wall of the wet bay from what I can tell...or it could be on the bottom of the tank in that same area.
Depending on how level I am, the leaking water could drain toward either side of the RV.
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__________________
95 Monaco Crown Royale
M11 400hp, 4060 trans.
Aquahot, Generac Guardian7.5k
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06-21-2021, 03:17 PM
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#10
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Senior Member
Join Date: Apr 2018
Posts: 3,441
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If you know it's the tank you're going to have to remove it anyway.
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07-06-2021, 07:27 PM
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#11
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Senior Member
Join Date: Nov 2014
Posts: 1,670
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and they just walk away
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2004 HR Navagator 500 ISM
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07-07-2021, 05:38 AM
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#12
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Senior Member
Join Date: Nov 2006
Location: Western NY
Posts: 6,113
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Tank drain fitting?
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Don & Marge
'13 Newmar Ventana 3433 - '14 CR-V TOAD
'03 Winnebago Adventurer 31Y - SOLD
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07-07-2021, 07:37 AM
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#13
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Senior Member
Holiday Rambler Owners Club
Join Date: Apr 2020
Location: Farmington Hills, Michigan
Posts: 973
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Are the tank support beams underneath wet when you have the leak?
I wonder if a previous owner of mine had the same problem. The passenger side of the tank support brackets are badly corroded but every time I've checked the tank and supports they are totally dry and I'm not loosing any water now. The overflow pipe is well below the bottom of the coach and seems to work properly.
If your supports are always wet, corrosion is a real concern. Might be easier and cheaper in the long run to make the effort and remove the tank and do thorough inspection.
__________________
2004 Holiday Rambler Imperial 40PKD, Cummins ISL 400
2019 Buick Envision AWD
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07-07-2021, 01:56 PM
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#14
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Junior Member
Join Date: Jul 2016
Location: Wherever we are at the moment
Posts: 26
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Quote:
Originally Posted by Lowflyer1
Are the tank support beams underneath wet when you have the leak?
I wonder if a previous owner of mine had the same problem. The passenger side of the tank support brackets are badly corroded but every time I've checked the tank and supports they are totally dry and I'm not loosing any water now. The overflow pipe is well below the bottom of the coach and seems to work properly.
If your supports are always wet, corrosion is a real concern. Might be easier and cheaper in the long run to make the effort and remove the tank and do thorough inspection.
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I agree, my plan is to remove the tank in a couple weeks and do some further investigating...I just need to be somewhere with full hookups for long enough to take it all apart. It's going to be quite a challenge from what I can tell. But, I'm going to go ahead and add tank heaters and new sensors for all the tanks when I put it back together again.
cps
__________________
Fulltimers since 6/2017: 2005 HR Ambassador 40PDQ,
MagnaSine 3K, 1K Solar, 412Ah SOK Lithium,
toad: 2015 C-Max Energi with Air Force One braking
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