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Old 03-09-2012, 10:25 PM   #1
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problem filling fresh water tank

when I'm filling the fresh water tank, it starts to spray backout before the tank is even 1/3 full. Has anyone else had this problem and how did you fix it.
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Old 03-09-2012, 10:30 PM   #2
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YUP!
The problem is one of a couple things. Luckily they are all associated with the same system. The fresh water tank vent.
The vent could be like mine and have a shut off valve that is closed.
Or the vent could be clogged or non existent. Or the vent could be in the wrong location.
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Old 03-09-2012, 11:35 PM   #3
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To answer your question, my vent had a shut off valve at the end of the vent hose. For some stupid reason my vent is under the trailer ahead of the axles and about three feet inside from the street side.
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Old 03-09-2012, 11:44 PM   #4
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The guy we bought the camper from told me to pull the hose out periodically to let the air out of the tank. He had also put a plug on the end of the vent line. I took the plug off and have no problems. Also, I know it's full when water runs out of the vent line. It has a ball valve on it that I close when I'm not filling it. Not sure what why he put that plug on in the first place.
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Old 03-19-2012, 03:34 PM   #5
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Thank you everyone for your help. I cannot check the other end of my vent hose because our rig has an enclosed belly. Will let you know if I find a solution.
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Old 03-19-2012, 03:45 PM   #6
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Use a smaller diameter hose and push it further in the tank.
They sell them at rv stores just for this reason.
Also allow your water to run in slower less than half flow.
Just barely turn your faucet on. It takes longer but works
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Old 03-19-2012, 03:55 PM   #7
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Something I noticed the last time I filled the fresh water tank. I already had the pressure regulator installed on the water hose from purging the water heater of air. The fresh water tank filled completely without ever overflowing - the only thing I can figure is the regulator didn't allow as much water to flow thru it.
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Old 03-19-2012, 04:12 PM   #8
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Don't forget to fill hw heater b 4 your done as well otherwise
you'll be another 6 to 10 gallon short first time you turn
pump on
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Old 03-19-2012, 04:40 PM   #9
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Quote:
Originally Posted by f1100turbo View Post
Don't forget to fill hw heater b 4 your done as well otherwise
you'll be another 6 to 10 gallon short first time you turn
pump on
Besides being short of water - it seems the pumps have a hard time getting the air out of the lines & water heater. That is why I had the pressure regulator attached to the hose - I always open the pressure relief valve on the water heater & run water thru it until all of the air is removed. Do the same on both cold & hot water lines to get all of the pink stuff & air out. The above mentioned is how I found out by using the water pressure regulator no more water spurting back when filling the fresh water holding tank.
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Old 03-19-2012, 05:03 PM   #10
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I dont seem to have a problem getting air out .
when filling the hw heater I just open the pressure relief valve until water comes out then I shut it .
then I start at the rear of the camper and turn on hw in outside kitchen then cold
then move to kitchen sink then to toilet,shower then last but not least the bathroom sink hot then cold very little air that way .
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Old 04-15-2012, 06:01 PM   #11
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Great tips everyone. I'm sure this will help.
Thanks
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Old 04-27-2012, 07:08 PM   #12
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My previous trailer had a similar problem. Turned out tube inside the wall of the trailer (from the fill hole to the tank) was routed up, then down (sort of like an upside down trap under a sink). Changing the routing so it went down solved the problem - it filled very easily after that. Not sure if I described this very well - hope it helps...

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