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Old 05-25-2022, 12:56 PM   #1
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Plumbing??? Draining?? Valves??

1999 Winnie Minnie 31C(?). Just got it. Not unfamiliar with RV's. Had all of them. Need help with what valve does what. All of them are under the bed in a hole!! Trying to post a picture. Can't even do that.
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Old 05-25-2022, 03:27 PM   #2
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Pump is working, but very little water pressure. And pump never goes off.
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Old 05-25-2022, 04:11 PM   #3
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Hi Live to Hunt,
You should be able to identify your floor plan from the Minnie Winnie 1999 brochure. In your 1999 Owner's Manual, you will find discussions in Section 7 about your plumbing, and page 7-8 ostensibly has the location of your valves, but the section doesn't deliminate between the three models.
There is an adjustment screw in the water pump to adjust the cycling and pressure. The Allen Head Screw should be turned counter-clockwise to reducing the cycling.
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Old 05-25-2022, 04:48 PM   #4
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Parts drawings here:
https://catalog3d.winnebagoind.com/menu/Parts.htm
And I suspect you actually have a 99Minnie wf331C, rather than Minnie Winnie! There are actually both but only one has a 331C model, so check that for "proper" name to get to the right place?

Plumbing drawings are a bit on the older side but some info there.
I did a couple snips of valves under the bed--if my guess is correct on right model?

https://www.winnebago.com/Files/File...m/Plumbing.htm

I would say those under the bed are just tank or low point drains.

I did notice a bypass valve on the water heater backside that you may want ?


Wiring here:
https://www.winnebago.com/Files/File...ram/Wiring.htm

My first guess on the pump is that there is a valve open, either letting water from the tank move to the pump and then back to the tank OR that there is a valve letting air into the pump, so that it can't draw the vaccuum needed to move water as it is easier to move air as lighter than water.

One good place for this to happen is if you have a valve for sending water to the tank or inside for direct use. If the tank is filled and this valve left in the "fill" position instead of moved back to "normal", the pump sucks air.

A second common problem is the little filter at the end of the pump is a very thin little plastic bulb and freezes quick and easy, so it may need a check. It can give a crack right at the input to the pump and suck air there.

A different problem with the low pressure and not shutting off is a leak in the line from the pump to faucets but those are expected to show up as leaks and water in the wrong places, so I tend to think it is sucking air before the pump rather than a problem after.
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Old 05-25-2022, 04:54 PM   #5
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To post picture the easy way?
Have the picture on the computer, not a picture storage like Photo bucket, etc.

Hit "go advanced" at bottom under the quick reply post box

Clip the paper clip at top center of top bar and follow to select the picture(s) one at a time. Then after selecting any you want to post, be certain to click the upload tab at the right before leaving that area ----which can be hidden if your computer plays like mine!

Worthwhile to preview before posting as they can get wierd and upside, etc if not watching how you held the camera/ phone, etc.
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Old 05-25-2022, 07:05 PM   #6
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Here's a link to the instructions for posting a photo:

https://www.winnieowners.com/forums/...ml#post3773760
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Old 05-25-2022, 10:16 PM   #7
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4 valves. A - D. What do they do? I know A drains the tank.
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Old 05-26-2022, 03:17 AM   #8
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I can say for sure that "D" is for winterizing. The hose attached to it is capped off at this time. Does the line on A go to the pump? Looking at A I would say its turned off, correct? Like wise can you tell where B&C go.
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Old 05-26-2022, 07:07 AM   #9
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One to pump one to suction, one to tank and one to front of unit is about all the description I get but most of that works out to be easy enough to tell what you are draining. If it only drain a little it is a low point drain, if it drains a lot, it's draining the tank! If it sucks through a clear tube, it's for antifreeze.

I would think looking for an owners manual would clear up a lot of questions.
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Old 05-26-2022, 08:11 AM   #10
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I can't help but think the water fill port is not sealed after filling. There's not cap or threads. Maybe has an internal flap valve?
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Old 05-26-2022, 11:32 AM   #11
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Quote:
Originally Posted by live2hunt View Post
I can't help but think the water fill port is not sealed after filling. There's not cap or threads. Maybe has an internal flap valve?
I may have missed it but is the a problem that you are trying to solve?

It seems you are making this more difficult than needed on a couple different parts.
One is what is the correct RV year, make and model? With the correct info we can then begin to sort out what the cause might be, but first, it helps if you let us know what problem you are working on???
Is there a further question in there somewhere?
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Old 05-27-2022, 09:39 PM   #12
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FIXED IT!! Yes, it was something very simple. The "A" valve is an on-off-on valve. Left drains the holding tank. Up is closed. And right allows water to flow to the camper. Makes ya feel stupid!!! Thanks for all the help.
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