Keystone RV Forums - View Single Post - Filling fresh water tank through overflow vent tube

MBK · 08-18-2019, 09:59 AM

I have a 26 foot cougar with a 40 gallon freshwater tank. The tank was about 1/3 full when I tried to manually fill it by pouring water through a funnel into the Overflow vent. It only took about six gallons and then Water started backing up out through the vent as if it was full. The level indicator shows the tank at about two-thirds full. Based on all the above information I would have expected to be able to put more water in the tank before it overflows. Has anyone run into this problem before when trying to fill the freshwater tank by manually pouring water into the Overflow vent tube. Thank you

08-18-2019, 09:59 AM	#1
MBK Junior Member Join Date: Apr 2019 Location: Novi Posts: 3	Filling fresh water tank through overflow vent tube I have a 26 foot cougar with a 40 gallon freshwater tank. The tank was about 1/3 full when I tried to manually fill it by pouring water through a funnel into the Overflow vent. It only took about six gallons and then Water started backing up out through the vent as if it was full. The level indicator shows the tank at about two-thirds full. Based on all the above information I would have expected to be able to put more water in the tank before it overflows. Has anyone run into this problem before when trying to fill the freshwater tank by manually pouring water into the Overflow vent tube. Thank you