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Old 01-31-2024, 05:03 PM   #1
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2002 25' Classic
Kalama , Washington
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What does this cover?

I'll need to remove this cover to learn why it dripped water during a recent cold spell (note the stain). It is close to the plastic fresh water drain. So, what's up there?
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Old 01-31-2024, 05:13 PM   #2
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If it is on the belly pan it maybe the wiring for the trailer lights , charge line , e-brake etc....
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Old 01-31-2024, 05:26 PM   #3
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My guess is the access cover to the short tube connection between the freshwater drain and tank. Below is a picture of mine (2022 FC) when I had to replace my plastic drain with a brass valve.


Steve
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Old 01-31-2024, 06:53 PM   #4
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Thanks Steve, DG. I'll need to jack it up to work on it. Hope I find a clamp I can tighten. But while I'm at it, I might as well swap out the plastic valve that has received so much comment here.

Brian
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Old 01-31-2024, 07:15 PM   #5
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Not great pics but I think you'll find something like this under that cover


Steve
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Old 01-31-2024, 10:11 PM   #6
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Thanks, Steve. Yeah, that helps a lot. Up she goes to get at that stuff
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Old 02-02-2024, 07:29 PM   #7
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I think it's the actual drain plug for the fresh water tank. Instead of using the nearby "valve" you mentioned in the OP, I remove this plug to get a more complete drain prior to winterizing (or flush when de-winterizing) the fresh water tank.


https://www.airforums.com/forums/f366/fresh-water-tank-plug-69076.html#post891347
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Old 02-05-2024, 08:09 PM   #8
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Okay - visual access gained

So, I've lifted enough to get under there a bit and the cover is swung away. Now I could use some ID help:
One arrow points to the pipe/clamp that goes to the plastic drain valve.
One arrow points to the probable drain plug (is it threaded?).
One arrow points to two small, metal drain valves (for what?).
One squiggly arrow points to what?

Looks awful up there. Builders left us a bunch of scraps, pop rivets, cuttings.
Mice chewed up some carpeting and hid out in there until we found them 20yrs ago.
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Old 02-06-2024, 09:46 AM   #9
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Check owners manual

See photos of tank out of an FC 30.

On the bottom side of the tank will be the drain valve connection , next to it is the feed to the pump with a gravel strainer in it, ( I believe the center port is a spare connection with a plug).

On the upper side is the large fill connection port.

On the bottom is the big nut which can be used to drain the tank or look inside.

On the top is a connection port for a vent tube.

Check Owners manual for the two metal drain valves, I think they are the low point drains for hot and cold water.
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Old 02-06-2024, 10:17 AM   #10
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Very helpful, Jim J. Thank you.
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Old 02-14-2024, 05:14 PM   #11
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The deed's done (for now, anyway). I removed the plug, with more than a little difficulty, as there was a piece of of belly pan in my way (not to mention the low ground clearance). I wanted to catch the draining water in a white dishpan, in order to inspect for tank sediment... it's never been drained in the 22yrs we've owned it. Surprisingly, there was very little. I flushed, emptied, flush again and let the fill hose run water through the tank for a couple of minutes.
After inspecting the plug, I decided that the cold temperature leak we experienced was likely caused by lack of thread sealer. Instead, I scraped scale off of the threads. So after applying plumbers putty I was ready to replace the plug but decided to remove the offending sheet metal first. I'm hoping to never need access to that plug again, but if I do it will be easier to extract. Removing/replacing the access cover alone is a PITA... just no room to work. Guess we'll see.
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Old 02-14-2024, 05:41 PM   #12
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While you are at it.....

I recommend you rework the tubing to the plastic drain plug. The offset makes it drain very slow, and the stress from the crimp along with age and vibration will ultimately cause the tubing to fail at the crimp at a most inopportune time. Ask me how I know. I got about 18 years out of mine.


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Old 02-14-2024, 10:28 PM   #13
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I guess we're on 4yrs of borrowed time, Al. Until I can lift this rig high enough to allow my arms to work, it'll stay as it is. The cheap (unused) draining spigot will remain as is until then (or until it fails). Worst case is that we buy a city water campsite until we get home. Like lots of construction, builders go cheap on what buyers can't see.... doubtful it has changed since we bought our 2002.

Brian
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Old 02-21-2024, 01:55 PM   #14
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And now, the "Paul Harvey' segment

True to Al's prediction, we had already borrowed the available time (to failure). It (the leak) wasn't the plug. We refilled and found the puddle the next day. Now I knew what it wasn't... and, what it probably was. A photo mid-drip confirmed that it was the pipe/tube leading to the drain valve. Another plug removal/draining cycle followed, along with an appointment at our local RV dealer. As luck (good luck this time) would have it, they weren't busy and had worked on Airstreams before. This story has a happy ending, but not a happy construction beginning (as the 2002 installer tried to install a piece that was too long for the space. Rather than cut it to length, he/she bent it (collapsing it) to make it fit. Then the clamps, confident that no one will notice... and they didn't for about as long as Al said! As the Bard wrote, 'All's Well That Ends Well'.
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Old 02-21-2024, 02:59 PM   #15
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Quote:
Originally Posted by TitusNW View Post
My guess is the access cover to the short tube connection between the freshwater drain and tank. Below is a picture of mine (2022 FC) when I had to replace my plastic drain with a brass valve.
Yep. I had the plastic fitting from the fresh water tank to the drain fail with a nice big crack. Water was leaking out of the seams of the access panel. Above the panel was insulation which I had to tear apart to reach the plastic fitting.
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Old 02-21-2024, 03:27 PM   #16
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DCPAS - You've given me one more reason to crawl under there... would probably be a good idea to put a piece of pipe insulation around that tank to spigot tube (this time at my leisure - we're beyond the chance of very cold temps, and it has an inside berth in our shop).
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