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Old 07-28-2014, 07:00 PM   #29
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Nope, won't let me download a pdf. Have a look at this link:
http://drainmaster.com/site/sites/de...ride_image.gif
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Old 07-28-2014, 11:58 PM   #30
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Can you please clarify the problem a little better:
You say the macerator pump rotates freely, so what exactly are you trying to free up?
Do the black and grey drain valves open and close properly? You should be able to hear them moving for a couple of seconds and then the red light on the valve switch should come on. Remember you can only have one valve open at a time, and its conventional to open the black one first.
If its one of the drain valve that is stuck, then take a look at the attached (hopefully) pdf doc which describes how to free it.
Sorry if I haven't been descriptive enough So, My electric valves will not open, the grey valve is stuck open and the black valve is closed. The macerator/ pump works great and emptied my grey tank. I looked at my fuses and circuit 7 20 amp fuse was blown.

I replaced it, turned the power back on and it blew immediately. I have tried every order of turning on the inverter and the power. I have gone through 8 fuses. I have turned the macerator pump frontward and backward more than 20 times. Still no result.

I need to empty the black tank, it is full, so I looked for manual override of the grey valve to close it and to open the black tank. I can't find them. I can see the valves and what looks like the electrical motor that says Auto Drain. I have read through the manufacture's website, where it states they have an easy manual override. But, it doesn't say where it is.

I could really use some help.

Thanks
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Old 07-29-2014, 12:01 AM   #31
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Fuses to electric dump valves

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Nope, won't let me download a pdf. Have a look at this link:
http://drainmaster.com/site/sites/de...ride_image.gif

Thanks, so much for the link, that is the kind of thing I am looking for, but I don't think I have a drain master, My valve looks like this.
http://www.barkermfg.com/autodrain.html
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Old 07-29-2014, 01:38 AM   #32
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Had fuses blow again!
Last time (original post) turns out the wires UNDER the camper were knocked loose from debris on dirt road we were driving on that weekend on camping trip. Apparently, that caused fuse to blow over and over. In order to dump - Had to crawl under camper and manually push open and close the valves to dump (not too hard to do) till figured out that problem when got home and camper over to our local airstream shop.
Then again- different Fuse blew - macerator fuse - right in middle of a dump! Yikes - turns out something jammed it up - (prob not enough liquid...) tried turning macerator w screw behind rubber cap but no luck. Again airstream shop took care of it - shop told me that something was stuck and cleared it and while there I asked about by-passing. They said only way is to take tube off between valve and macerator. Eek.
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Old 07-29-2014, 08:19 AM   #33
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Thanks, so much for the link, that is the kind of thing I am looking for, but I don't think I have a drain master, My valve looks like this.
Barker_AutoDrain
On that same page you provided is a button to download the owner's manual, and in there is a diagram of the parts of the valve; it also tells you how to manually open/close the valve: remove the 2 screws indicated to free the auto drain from the housing and this will allow you to push/pull the valve to open/close it.

The arrangement you have is clearly different from mine, so you should also check the Airstream manual for the dumping procedure to see if the grey valve has to be closed before you can open the black valve, which I'm sure is likely to be the case.
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Old 07-29-2014, 09:04 AM   #34
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The arrangement you have is clearly different from mine, so you should also check the Airstream manual for the dumping procedure to see if the grey valve has to be closed before you can open the black valve, which I'm sure is likely to be the case.
On mine, you can only operate one valve at a time, but there is no interlock requiring one valve to be closed before you can open the other; it's just that only one valve can be in motion at a time without blowing the fuse. I found that out the last time I hit the dump station.
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Old 07-29-2014, 11:13 AM   #35
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Thanks both of you, I must have over looked it. Thanks, again, I will work on it today.
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Old 07-29-2014, 09:01 PM   #36
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Looked under mine today and saw that I have the Auto-Drain valves. To get under there to remove the two screws to operate the valve manually would require that the van is either straddling a ditch or on a lift. Neither are probably available at most dump stations.

Thanks to raddocc and UKDUDE for the valve links.
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Old 07-29-2014, 10:14 PM   #37
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To get under there to remove the two screws to operate the valve manually would require that the van is either straddling a ditch or on a lift. Neither are probably available at most dump stations.
Yes, I'm dreading the day when I have trouble with my waterworks.
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Old 07-30-2014, 05:57 AM   #38
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Looked under mine today and saw that I have the Auto-Drain valves. To get under there to remove the two screws to operate the valve manually would require that the van is either straddling a ditch or on a lift. Neither are probably available at most dump stations.
I carry leveling blocks anyway to level my Interstate while camping. If I park on a flat surface I can use those blocks to obtain a little bit of elevation of at least one end of the vehicle for wiggling underneath if need be. It's remarkable how much difference just a couple of inches makes.
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Old 07-30-2014, 06:22 AM   #39
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Old 07-30-2014, 07:26 PM   #40
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Is new always an upgrade? Think about it! Jim

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Old 07-30-2014, 08:03 PM   #41
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Is new always an upgrade? Think about it! Jim
Given that Airstream Interstates have only been around for 10 years now (first produced in 2004), by your standards they're all new!

But in any event, I think the last time an Interstate came with a slinky and manually-operated dump valves was 2007, so macerator pumps and electrically-operated valves aren't exactly new by the standards of an Interstate owner.
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Old 07-30-2014, 11:11 PM   #42
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I took off my auto drain motors and the black tank drained like a champ. It must be my circuit board. I will open them manually until I can get it fixed. Thx for all the help and patience.
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