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Old 05-14-2021, 09:27 PM   #1
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Greyhawk 29MV fresh water won't fill

We have a 2017 Greyhawk 29MV, its our third year of ownership. And now for some reason it has been taking longer and longer to fill the fresh water tank, "1 1/2hrs" . And now it won't fill at all. We have flushed the system after every winter season. And filling the tank has never been a issue until this trip. Does anyone have any ideas. We're in the middle of a trip and I'd like to get this working before I get home.
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Old 05-15-2021, 07:42 AM   #2
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Hi Ron... try this- Pull out the screen in the inlet connection, then push in the backflow button with your thumb nail many times to see if it is sticking. After that perhaps a hose kink?
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Old 05-15-2021, 07:44 AM   #3
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Buy new screens for your water inlets, they're super cheap. Or at least remove it temporarily and see if it's stopped up and solves the problem.

You're using either the CITY FILL or the COUNTRY FILL in your selection each time yes?

Look under the bathroom sink and change out that filter with a new one.

Do you occasionally flush the fresh water system with bleach or shock?

I bought a small reservoir to add bleach, it isn't perfect but it works.

RV Inline Sanitizer - The Easiest Way to Help You Disinfect Your RV Fresh Water Tank, NO Mess, NO Moving Part, just Connect with The Hose and add Bleach
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Old 05-15-2021, 08:10 AM   #4
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Check the set screws on the valve handles. They have been known to loosen so you may not be turning the valve completely.
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Old 05-15-2021, 08:25 AM   #5
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Hello Ron, I also have the same 2017 29MV . Our fresh water tanks have these Air breather tubes (3) overflow and they have to be clear free and no obstructions. Next is the City fill port for us. there is a push button that the screen might be pushing on. that's a anti-siphon or back flow prevention . this should only be active when you want to suck in water/antifreeze . this could also be restricting flow into your fresh water tank .

Goodluck. Ted
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Old 05-15-2021, 12:21 PM   #6
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Check the water filter element under the bathroom vanity.
.
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Old 05-16-2021, 11:01 AM   #7
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Quote:
Originally Posted by Ron, Indy View Post
it has been taking longer and longer to fill the fresh water tank, "1 1/2hrs" . And now it won't fill at all.

Since it's been getting worse, over time - that leads me to something like what Grumpy said.



See if the valve handles have loosened up.
Flip the valves to Normal and see if things work, flip them to Country Fill and see if you can get water into the tank, etc.
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Old 05-29-2021, 10:11 PM   #8
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Update on super slow fresh water fill. It turned out to be a badly clogged house water filter. It was the last thing I thought of because I installed it just before this trip. The first place we stopped had "well water" and I guess because the park just opened for the season, there was "A LOT OF SAND" in the water and it just shot that poor filter. I pulled the filter and problem solved, I have to replace the filter but luckily I still have the unlined filter on my hose. And we don't drink or cook with it. I guess I'll start traveling with a spare.

Happy Travels
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Old 05-30-2021, 04:08 AM   #9
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Glad to hear, should fill like new. !
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Old 05-30-2021, 04:17 AM   #10
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Good find to save the trip but I would still put that at the top of my list.

That sand in the campers pipes can cause future problems.
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Old 05-30-2021, 08:50 AM   #11
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That’s why I went to double filter hooked up outside the rig. Removed inside filter and totally redid under sink water lines eliminating filter. Now I check filter after every stop. In past like you we have plugged up filter in a week when park had poor water supply. Glad it was easy fix. Safe travels

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Old 05-30-2021, 09:13 AM   #12
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Just a thought, back when I used my Duramax to pull a 5th wheel I got some bad fuel once which plugged the filter, ever since then I would pump a little into a container first that I used to add some Diesel Kleen\lubricant and inspect the fuel before filling the tank, and a couple of times since I have found nasty fuel prior to pumping a tankful. I suppose that doing the same when connecting to RV Park water supply would be good to do, hook up the hose to the park's spigot and let it run a little bit (perhaps into a glass) and see if it has grud in it, if so let it run for a while and hopefully it will clear out quickly and before ever connecting the water hose to the RV. ~CA
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Old 05-30-2021, 10:36 AM   #13
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How do you fill clean water supply tankk.
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Old 05-30-2021, 11:09 AM   #14
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At one of our favorite camp sites we always open the tap and let it run until the water is clear before connecting it to our system. Always seems to be some red tint when it sits unused.
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Old 06-01-2021, 11:23 AM   #15
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Originally Posted by Annieozaeta View Post
How do you fill clean water supply tankk.

Are you asking how you put water into the RV's fresh water tank? Or something else?
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Old 06-01-2021, 11:35 AM   #16
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Are you asking how you put water into the RV's fresh water tank? Or something else?
yes, I hooked up the hose to faucet then tried to hook up to motor home to fill and it wouldn't fill.
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Old 06-01-2021, 01:19 PM   #17
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yes, I hooked up the hose to faucet then tried to hook up to motor home to fill and it wouldn't fill.



The exact procedure will depend on what your connection panel looks like. Or tell us the make, model and year of your Jayco and we may be able to figure it out.


In **general**, this is what I do to fill the Fresh Water tank on our RV:
- turn water pump off
- connect the water hose to the top hose connection on my panel (labeled City Water Connection)
- we have to flip the two valves to say "City Fill Tank". On ours that's positions 1 and 6
- turn on the water


When it's full, disconnect everything. Flip the valves to "Normal" and turn on the pump.
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Old 06-03-2021, 05:43 AM   #18
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Originally Posted by Tgroves526 View Post
Hello Ron, I also have the same 2017 29MV . Our fresh water tanks have these Air breather tubes (3) overflow and they have to be clear free and no obstructions. Next is the City fill port for us. there is a push button that the screen might be pushing on. that's a anti-siphon or back flow prevention . this should only be active when you want to suck in water/antifreeze . this could also be restricting flow into your fresh water tank .

Goodluck. Ted
Hey Ted,
The three overflow /breather tubes you are talking about, are the hanging down underneath the coach beside the water tank?
I saw those and wondered what they were for.
Thanks,
Marc
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Old 06-03-2021, 09:39 AM   #19
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Yes these overflow tubes white (1/2" id) hang down and these need to be free of obstructions. I took mine and tie wrapped 2 of the 3 up above the elevation of the tank because i was sick of filling at home and driving then it was 2/3 empty when we arrived. Hope it helps Ted
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Old 06-07-2021, 03:36 PM   #20
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Hey Ted,
Why only two of them and how do I know which two?
I guess also cover the ends with screen to keep mud dauber out of the hose.
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