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Old 01-25-2016, 12:48 AM   #1
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Mystery Hose

I have a 2014 thunderbolt 395 AMP, first owner. Just past my axle where it becomes the toy hauler section is a hose (greenish, cut end, no threading or cap) sticking out from my belly skirting. A few days ago water started to come out, for the first time, and I don't know why. My water is connected through the city water hookup, and I have never put anything in my fresh water tank. Just to fill the fresh water is a separate hookup line all together. What is this hose and why is it constantly discharging what seems to be fresh water?
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Old 01-25-2016, 03:00 AM   #2
SYE
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Quote:
Originally Posted by DLClark View Post
I have a 2014 thunderbolt 395 AMP, first owner. Just past my axle where it becomes the toy hauler section is a hose (greenish, cut end, no threading or cap) sticking out from my belly skirting. A few days ago water started to come out, for the first time, and I don't know why. My water is connected through the city water hookup, and I have never put anything in my fresh water tank. Just to fill the fresh water is a separate hookup line all together. What is this hose and why is it constantly discharging what seems to be fresh water?
That hose is your Fresh Water Tank vent/overflow. My guess is the check valve that is between the fresh water tank and between the city water needs to be exercised. To do this rune your pump for a bit, this will exercise the valve.Before doing this, I would check the water tank level, guessing that it is full since it came out of the overflow and then turn off the city water. Try this, and see how it works.
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Old 01-25-2016, 05:53 AM   #3
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Totally disconnect from City water/turn on Pump/use lots of water,turning your fixtures on and off frequently/this will allow the Pump to build pressure and internally reset the Check Valve! Run on the Pump for a while and let it exercise itself,then turn off Pump and Drain the F/W tank,leave tank drain open,and hook back up to City Water,check if water is coming out the F/W drain from tank! If it is you can go through the above again OR Repair/Replace Pump? Youroo!!
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Old 01-31-2016, 11:35 PM   #4
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Sorry for the late response. Thank you all for the suggestions. I have ran the water pump excessively and a few things i have noticed.

The pump doesn't shut off like it used to after building pressure in the line. it turns on ever few seconds and runs for a couple seconds, i suspect a leak in the line or a failed valve.

I cant get at the pump just yet so i rigged up a temporary solution to direct the flow to the sewer instead of spilling on the ground. Now its coming from a second discharge line closer to the center/front of the RV.

Youroo, you mentioned draining the FW tank. How? the only tanks I know to and how to drain are my grey and black tanks. I know of nothing else.
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Old 02-01-2016, 05:06 AM   #5
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You have two fresh tanks. Each has it's own drain which is a white threaded plastic cap that you remove from a short hose hanging from your underbelly. On is just forward of your front axle. The second is back behind your rear axle. They should exit in the same areas as the rough cut uncapped vents from each tank that you were describing earlier.
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