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Old 10-13-2019, 11:35 AM   #1
Cattail
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Mystery Hose

On my Bullet 210RUDWE, the fresh water and city water connections are side by side on the port side just forward of the forward egress window and lead inside to the water pump. When I removed the access panel just aft of the laundry chute to inspect the water pump, however, I discovered a third hose which appears to come in just above the fresh water and city water hoses. Any idea where that third hose comes from and where it goes? It doesn't come from outside near the other two hoses and isn't connected to the water pump. I thought it might be related to the black water tank rinse system, but that appears to enter the cabin under the bathroom sink (identified by the anti-siphon valve). My owner's manual doesn't include a plumbing schematic and, of course, I haven't been able to locate a phone number for the Keystone factory in Pendleton, OR. Any ideas?
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Old 10-13-2019, 11:57 AM   #2
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First possibility that occurs to me is that it's the air egress/overflow tube from the freshwater tank.
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Old 10-13-2019, 12:40 PM   #3
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I agree, especially if it’s corrugated.
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Old 10-13-2019, 04:22 PM   #4
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Tank vent probably
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Old 10-14-2019, 06:42 AM   #5
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Quote:
Originally Posted by NH_Bulldog View Post
I agree, especially if it’s corrugated.


Fill hose is usually corrugated. The vent pipe is usually 1/2” smooth hose. Normally hooked up to the screen vent at the fresh fill port with a hose clamp.
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Old 10-14-2019, 06:59 AM   #6
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My bad.....and I was just in there winterizing too!
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Old 10-17-2019, 07:46 AM   #7
Cattail
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FYI: Keystone Goshen has confirmed that the mystery hose is the vent for the fresh water tank. BTW, the hose is a smooth white 1/2" water hose with a red stripe running lengthwise. Thanks, everyone, for your help. That's one I won't have to winterize.
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