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Old 08-20-2016, 08:33 PM   #1
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2005 30' Classic
Zionsville , Indiana
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How to drain the fresh water tank

My 2005 30 Classic has two drain petcocks between the curb side wheels. I open both and the water drains.

Here is the question. If I turn off the water pump, the water does not drain, or slows to a drip, but with the pump running out it comes, is this normal?

Thanks in advance for you comments.
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Old 08-20-2016, 09:05 PM   #2
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Those are the low point drains. They are on the trailer side of the pump to drain the hot and cold water lines. On my trailer, 2002 Classic 30, and on my previous Safari 25, the tank drain is up higher on the frame rail behind the curbside front wheel. If it hasn't been changed it is a gray plastic petcock. Turn the lever to the front to open, to the rear to close.

Al
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Old 08-21-2016, 12:56 PM   #3
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I've looked and looked, but no other "drains" on my tank. I have the two petcocks on the bottom of the tank, and I can see the access door for the other low point drain (but it's caulked shut). I can see, on the side of the tank on the same side of the coach (curb) as the petcocks and the access door something that looks broken off a sealed (almost like a bad weld).

I'll assume using the petcocks to drain the tank is still OK until I get the drain fitting fixed (going to JC at the end of the season). But from my original question, does the pump need to run to push water from these petcocks or should it just drain when they are opened?
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Old 08-21-2016, 01:12 PM   #4
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Yes, you will have to run the pump to pump the water out of the tank to the lines where it can drain from the low point drains.

Al
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Old 08-21-2016, 01:21 PM   #5
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Here's a picture

This is what the tank drain on both of my trailers looks like. It is higher on the side of the trailer than you might think and is behind the curbside front wheel.

Al
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Old 08-21-2016, 01:26 PM   #6
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Welcome to the forum!

Your owners manual should describe the water tank's drain valve(s). I believe that the attached link is for your owner's manual, and on p. 89/126 it says:
____________________________________________
"Pumping the water out with the self-contained water pump may empty the fresh water tank. Simply turn on the pump switch and open a couple of faucets until the water will no longer comes out. On all models there is also a petcock type drain valve located in the wheel well and extended out through the tank support pan.

"An additional drain plug is located on the bottom of the tank, accessible under the inspection plate close to the petcock that can be seen on the bottom of the tank support pan.

"Note: For winterizing purposes, only the petcock behind the tires needs to be opened to drain the tank."
_____________________________________________
https://www.airstream.com/wp-content...lassic2005.pdf

If you could post a photo of the valves you see, it might be easier for folks to give you more precise guidance.

Good luck!

Peter



Quote:
Originally Posted by rpenczek View Post
I've looked and looked, but no other "drains" on my tank. I have the two petcocks on the bottom of the tank, and I can see the access door for the other low point drain (but it's caulked shut). I can see, on the side of the tank on the same side of the coach (curb) as the petcocks and the access door something that looks broken off a sealed (almost like a bad weld).

I'll assume using the petcocks to drain the tank is still OK until I get the drain fitting fixed (going to JC at the end of the season). But from my original question, does the pump need to run to push water from these petcocks or should it just drain when they are opened?

PS -- edit -- Sorry for the different font. The copy and paste from the PDF did not go smoothly within the alloted edit time window.

PS2 -- The pump can hasten the draining of the water from the low point drains, but don't let the pump run dry, it will be damaged. The low point drains should drain without the pump helping, also. You should read your owner's manual about winterizing your trailer, in addition to the text quoted above.
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Old 08-21-2016, 02:00 PM   #7
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Running your pump allows the tank to "vent". Try opening a galley or lav faucet to allow a vacuum to break and it should drain fine.
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Old 08-21-2016, 02:59 PM   #8
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Thanks all. My tank drain is in fact gone (based on the photo in a prior post thanks for that photo).

The place where the drain was, looks to be plugged. As I noted, the rig is going to JC in early November so it will be another item to have fixed.
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Old 08-21-2016, 06:08 PM   #9
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Thanks for the feedback.

Peter
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Old 08-21-2016, 07:32 PM   #10
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Quote:
Originally Posted by rpenczek View Post
Thanks all. My tank drain is in fact gone (based on the photo in a prior post thanks for that photo).

The place where the drain was, looks to be plugged. As I noted, the rig is going to JC in early November so it will be another item to have fixed.
Somewhere here there is a least one thread about more rugged replacements for that cheap plastic petcock. Maybe someone will post where. If not a bit of imaginative searching should find it (them).

Ken
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Old 08-21-2016, 07:35 PM   #11
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One of the all-caps ROBERT.........

ROBERT CROSS in Post #5 here:

http://www.airforums.com/forums/f443...-151072-2.html
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Old 08-22-2016, 10:58 AM   #12
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[QUOTE=Al and Missy;1838864]This is what the tank drain on both of my trailers looks like. It is higher on the side of the trailer than you might think and is behind the curbside front wheel.

Question, can this drain be replaced with a larger size faucet/petcock, where would I find one?
Thanks
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Old 08-22-2016, 11:06 AM   #13
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Quote:
Originally Posted by carlose View Post
Question, can this drain be replaced with a larger size faucet/petcock, where would I find one?
Thanks

See link in Post #11, and Post #5 in that thread.
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Old 08-22-2016, 12:06 PM   #14
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2014 16' Sport
Walnut Creek , California
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Fresh water drain

Maybe if California could run a hose to all you Airstream owners draining your fresh tanks our water problems out here would be solved. What a waste.
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