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Old 10-03-2010, 09:35 PM   #1
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Join Date: Jan 2008
Posts: 29
Advice on gray water tank leak

I found that when I hooked my 2008 Flagstaff 831KRSS up when getting ready to go home after 3 days of camping...water poured out from the underbelly skin.

I did not see water inside anywhere, so I knew this was between the camper floor and underbelly skin somewhere. When I was dumping tanks, I pulled the gray tank and got very little water out! I was suspicious of this lack of water. I went home and removed the underbelly and found a leak (shown below) when I pressurized the freshwater system. It seems to be pouring out right at the bend of the 90 as shown in pic. I did make sure it is not running down the pipe from a different point.

I am looking for advice as to what would be the easiest way to fix this issue from a plumbing standpoint. I have enclosed a second picture showing where this pipe attaches to the gray tank which is the other end opposite the 90 that is shown leaking. thought maybe replace the whole straight section up to and including the 90?

Leak Picture 1

Leak Picture 2

I also had a small bit of water around the drain on freshwater tank and have enclosed a picture of the valve that spins. I am not sure if this is supposed to spin, or if it should be screwed in and tight into the bottom of the freshwater tank? I have not had time to pull the freshwater drain hose off and mess with fitting. If anyone is familiar with this I would love to know if it is supposed to be fixed or spin.

Fresh water drain plug

While where at it let's fix another one of my issues. When I fill freshwater tank from external inlet, I get a lot of water that pours out and kind of (Burps) several times when I fill. I also get a leak of water from hose inlet onto my kitchen floor. I have removed intake and see that when hose fills all the way, a leak is present from around the corrugated hose that goes from inlet to freshwater tank. I have tried to tighten the clamp, but the hose has 2 diameters and I can only get hose over the first part due to it's length. I wonder if this needs to go all the way up over both diameters? I have shown two photos of this.

Finally, I noticed that the air hose that runs next to the other hose is so tight it is kinked and nearly closed off at the point it goes into the freshwater tank. Could this be part of my (Burping) problem?

Tank fill inlet 1

Tank fill inlet 2

Any info on these issues would be appreciated.

Thanks, Frank

2005 Dodge Ram Quad Cab 4x4 (5.7L Hemi)
2008 Flagstaff 831 KRSS
2000 Son
2002 Daughter
1969 Wife
1974 Me

Live and Work in St. Louis, MO. area, but play everywhere!
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Old 10-03-2010, 09:54 PM   #2
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Join Date: Aug 2006
Location: Prairieville, Louisiana
Posts: 1,927
If the leak is only at the 90 elbow, you don't need to replace the whole drain line. The pipes and fittings are ABS; and can be bought at Lowe's or your local hardware store. I'd cut the drain pipe back a foot or so. Install a coupler, a section of ABS drain pipe and another elbow. The elbow is sealed to the tank with Butyl.
Also, if you can, double the hose clamps at the tank outlet.

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Old 10-04-2010, 06:55 AM   #3
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Join Date: Mar 2008
Location: Jacksonville Florida
Posts: 1,264
I had the same leak problem, but at the other end connecting to the fresh tank. I installed two heavier duty clamps that I could tighten with a socket wrench. Also, before tightening, I slipped the hose off, and put some silicone on the outside of the fitting. No more leak! Also, NO the valve on the bottom sould NOT spin. It needs to be a water tight connection. Randy
/SIGPIC]'08 V-lite Flagstaff 30WRLS
'06 Ram 1500 QC hemi Reese dual cam sway control,
K&N series 77 intake, Hellwig helper spgs. LT tires,
Flowmaster "true duals", 380 h.p., Bilstein shocks
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