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Old 04-30-2009, 07:19 AM   #1
cgeis48
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Kitchen Sink Won't Drain

The kitchen sink does not drain. Sounds simple but the trap was disassembled and was clear. The gray water tank drains OK - so what could be causing such a problem??
This is a 2009 Montana 3075RL.
 
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Old 04-30-2009, 07:34 AM   #2
Pete Hanson
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For a lot of us the fact that there is a galley tank (yes....a third holding tank) in our Monty's came as a surprise tp us and I am wondering if you know about it. For my 2955 the drain handle is located between the tires on the drivers side of the Monty.
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Old 04-30-2009, 08:20 AM   #3
Glenn and Lorraine
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Pete is dead on. Look for a 3rd drain valve somewhere on the frame on the street side of your Monty.
After all these years you would think that these salesmen or techs would learn to show that hidden valve to their customers.
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Old 04-30-2009, 08:41 AM   #4
David and Jo-Anna
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Ours is between the wheels on the street side.
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Old 04-30-2009, 09:33 AM   #5
jpkelpe
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ours is behind the back wheel, driver side--WAY up along the frame. We looked and looked for it until finally we found it. The tech was looking for it with us too. They really know how to hide that one.
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Old 04-30-2009, 04:34 PM   #6
cgeis48
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I do believe you have identified the problem - the second gray water valve is cleverly hidden - thanks!
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Old 04-30-2009, 06:12 PM   #7
rames14
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You are not the first to get bit by the third handle. And you won't be the last. Good luck.
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Old 07-06-2022, 05:20 PM   #8
TomHerod
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This thread saved us!!!!

I tried all kinds of unclog remedies and even a snake! Then my wife used the magic Google words, “Montana kitchen sink won’t drain.” And you ended a day’s worth of frustration. How sweet the sound of gray water rushing from the kitchen pipe to the main waste outlet. I’ve attached some pictures to help the next lost soul who was unaware of the “secret second drain valve pull.” Thank you those who rescued us. Tom and Allene
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Old 07-06-2022, 05:27 PM   #9
Mikendebbie
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Tom - welcome to the forum and Thankyou for the excellent photos!
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Old 07-07-2022, 04:52 AM   #10
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Welcome to the forum, Tom. I've also read of a few who have lost that handle on the road somewhere. It can unscrew itself while driving and fall off. I ended up drilling a small hole in the end of the plastic T handle and running some paracord to tie it off to the frame.
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