fresh water tank drain valve - Dutchmen Owners

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Old 04-30-2014, 01:58 PM   #1
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Question fresh water tank drain valve

I have a 2011 263RLS Kodiak TT. When I put fresh water in the tank, it runs right out the drain hose underneath the trailer like there's a valve open. I've never seen or turned a fresh water drain valve so I have no idea where to find it. It was just winterized by the dealer so I'm figuring that's what happened and I have called them to ask them where the valve is so I can turn it back off and fill with water, but I've not heard back from them. I crawled underneath and I've poked through cabinets and I can't find that stupid valve to save my life anywhere?

The small portion of pvc that protrudes from the insulated underbelly appears to have a small beige cap on it - but turning the cap one way or the other has no result on slowing the water flow out of the tank. There must be a valve somewhere??? AND of course the "Owner's Manual" is written so generically it mentions of course draining fresh water and other tips on winterization but mentions nothing about the potential location of the necessary valves, hoses, etc. that you need to find to do so.

Can anyone speak with any authority on where I might find this mysteriously hidden valve? Any help is greatly appreciated!

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Old 04-30-2014, 03:10 PM   #2
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Don't have the same unit but mine has a cap on the tube your talking about. Cap ON, holds water, Cap OFF, drains the tank. If you could get a picture it would help.
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Old 04-30-2014, 04:55 PM   #3
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I have a slide valve same as my grey and black dump valves.
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Old 04-30-2014, 05:23 PM   #4
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Originally Posted by sawpilot View Post
Don't have the same unit but mine has a cap on the tube your talking about. Cap ON, holds water, Cap OFF, drains the tank. If you could get a picture it would help.
Mine is like this. When the dealer winterized it, he left the cap off and put it in the water heater compartment along with the water heater drain plug. Try opening the outside access to your water heater and see if they stashed it there.
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Old 04-30-2014, 06:54 PM   #5
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Cool Issue Solved!

There's a plug that screws into a cap on the end of the drain pvc that pokes out of the insulation under the trailer. No valve, just a plug - identical in size and makeup as the drain plug to the hot water heater. What an idiot I am... I couldn't figure out why there was that little fixture on the end of the drain pvc pipe - couldn't see that it was threaded until I crawled under there (after all the water was drained out so I didn't get drenched).

Thanks to everyone for their responses. I guess a labelled valve somewhere would have been too much to hope for.... for now - plug in - water stays in the tank!
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Old 04-30-2014, 07:05 PM   #6
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Originally Posted by bthorsberg View Post
There's a plug that screws into a cap on the end of the drain pvc that pokes out of the insulation under the trailer. No valve, just a plug - identical in size and makeup as the drain plug to the hot water heater. What an idiot I am... I couldn't figure out why there was that little fixture on the end of the drain pvc pipe - couldn't see that it was threaded until I crawled under there (after all the water was drained out so I didn't get drenched).

Thanks to everyone for their responses. I guess a labelled valve somewhere would have been too much to hope for.... for now - plug in - water stays in the tank!
I would install a valve into that fitting & not a cap. You can open a valve slow if you need to drain it while a cap is going to get you drenched.
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Old 04-30-2014, 07:43 PM   #7
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On my unit It doesn't flow very fast when you take the cap off, just a slow drain. In fact, it takes FOREVER to drain the fresh water tank this way.
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Old 04-30-2014, 07:55 PM   #8
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On my unit It doesn't flow very fast when you take the cap off, just a slow drain. In fact, it takes FOREVER to drain the fresh water tank this way.
Try taking the fill cap off next time and see if it makes a difference.. My guess is, it's creating a vacuum & that's why its slow.
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Old 04-30-2014, 08:40 PM   #9
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That's a good idea, I think I've tried it before though. The fill cap assembly includes a vent, so I don't think it can create a vacuum even when the cap is screwed on. The drain hose is only about 3/8" inside diameter, so no matter what it isn't going to allow that much flow.
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Old 04-30-2014, 08:48 PM   #10
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If it's only 3/8" yea it wouldn't flow much. I know it has a vent but that's very small also. Except for replacing the line with a 1/2 or 3/4" I've run out of ideas.
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Old 05-24-2016, 06:15 PM   #11
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Remove the drain cap or open the valve on the water heater and the Fresh water will drain fast. I had the same slow draining problem and drove 2 hours home to find it still draining at a slow drip, until I asked a few experienced RV'er at work and they suggested that. Sure enough drained before I left the park.
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Old 05-24-2016, 08:37 PM   #12
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Now that this topic has been resurrected I'd like to show off a small mod I made to my fresh water drain. Since the drain is located right behind the steps and it takes two hands sometimes to get the darn plug out I added the 1/2" drain petcock that Camco sells on Amazon. Now I can reach behind the steps with one hand to open the drain.
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Old 05-24-2016, 11:26 PM   #13
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I used this valve, can turn one handed. From amazon.
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