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midnightpumpkin
Moderator
USA
388 Posts |
 Posted - Nov 01 2007 : 10:03:33 PM
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I have had an issue with the fresh water tank vent on our 8315 since day 1. I have never been able to fill the tank so that the indicator goes full and rarely will it make the 2/3 mark. Today, I pulled the underbelly material down in rear of the unit to see what was going on.
Here is a view of the fresh water tank mounting setup. There are 2 rails going side to side supporting a plywood panel that the tank sits on. There are also 2 rails going fore and aft between the side to side rails, these rails also support the plywood panel. Overall the mounting of the tank appears to be substantial and adequate.
This next view shows the problem with the tank venting. The vent tube is the clear plastic tube. As you can see, it goes from the top of the tank and droops down to the level of the underbelly and then back up through the floor to the tank filler. The vent tube is full of water.
Here is another shot showing the water in the tube. You can see the darker area at the bottom of the tank which is the actual water level in the tank.
Another issue, is the routing of the filler tube itself. It was lying on the bottom of the frame rail and then went up to the top of the tank.
So here is my solution. First I installed two ty-wrap saddles on the subfloor above the tank and secured the vent to the sub floor, keeping the vent tube above the top of the tank.
I then sucured the filler tube to a cable clamp which happend to be located high on the frame rail to keep the filler tube as high as possible.
One other issue to be aware of is that the drain line goes above the front rail that supports the tank. This means that the drain leaves about 2 inches of water in the bottom of the tank when the drain stops flowing. This water can be removed from the tank by running the water pump. Keep this in mind when winterizing. I could have moved the drain cock inside the rails, but it didn't seem worth the effort to do so.
While I was at it, I drilled two holes to secure the pickup line and the wiring to the plywood panel, they were just laying on the underbelly material as built at the factory.
One final shot shows the flexible tube running to the heat register in the bedroom. This tube snakes around the holding tanks, no wonder we don't get a whole lot of heat back there!
The result of re-routing the vent and filler tubes was that I was able to quickly fill the tank from a hose that was fully turned on with no water coming back out the filler tube until the tank was over filled. See the indicator now!
I measured the physical dimensions of the tank, 28.8 wide x 45.5 long, x 5.5 deep, this calculates out to 30.8 gallons.
John U
2007 Rockwood 8315SS
2003 Dodge Ram 2500 Short Bed, Hemi
Ready to travel weights:
Trailer 6640# on Axles, 920# on tongue.
Combined gross wt no people on board 13855#
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Edited by - midnightpumpkin on Nov 02 2007 10:09:23 AM |
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milzat
Administrator
USA
1119 Posts |
Posted - Nov 01 2007 : 10:27:02 PM
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| Thanks for the report, John. Now I'll have to do the same to mine. |
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gsbainter
Average Member
USA
134 Posts |
Posted - Nov 02 2007 : 3:28:56 PM
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Wow!
That is some detailed analysis and fix. Great job John. It makes you wonder about all of the issues on these rigs (concertone, heated tanks always on, etc.). I know, no different than any other manufacturer.
Greg & Susan
2005 Rockwood 8314SS
2006 Chevy 2500HD CC LB 3.73 8.1 big block
Takonsha P-3 Reese Dual Cam HP
Dogs: Walter(Boxer and Staffie mix) and Teddy (Lab mix) |
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woody01
Moderator
USA
367 Posts |
Posted - Nov 02 2007 : 6:52:19 PM
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Good work John my brain hurts just reading it. 
Steve & Nicole Wood
Luke 7, Morgan 4
2002 F-250 super-duty
2003 Rockwood 8281SS 5er |
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Fresh Water Tank Vent Issue
