Good Day all,We are preparing for some extensive dry camping and I wanted to be sure my fresh water tank is full as it seems the last few day trips we ran out of water too quickly. Of course the LED gauge does not function properly.Here is what I did.Coach levelDrained fresh water tank from bottom.Turned hose on with a rate of 1 gallon per minute. ( based on jug and stop watch )Put extension on hose to go into the fill tube.Here is the puzzle, in 32 minutes water was flowing out the fill tube which tells me that is somewhere about 28-35 gallons in a 68 gallon tank. The rate of 1 gallon per minute should have taken about an hour.What could cause the tank not to "fill" up based on my math?How do you verify the tank is actually full when the gauge is not reading properly?Looking forward to your replies.

Pressure on municipal water systems isn't constant. Your test flow may have been at an unusually high demand time.I minute for a gallon seems very slow

Can you put more water in the tank after it overflowed? I know I am able to get more water in after the first "overflow." After the first overflow I reduce water pressure and it runs for some time.Also, RV makers sometimes, if not often, include the capacity of the hot water tank when stating fresh water capacity. I believe in your case it is a 12 gallon hot water heater so if they counted that it would take capacity down to 56 gallons. (How you are ever supposed to use the water in hot water tank, without draining it, is beyond me.)Mike

Agree with above. Maybe try to use something like a 5 or 6 gallon bucket to give you a better flow rating. One thing not to forget, is that when the claim is for a 90 gallon fresh water tank it is actually 80 gallons with 10 gallons of water for the water heater (assuming the W/H is 10 gal capacity). rockin'

You can get the $14.00 water meter from Amazon, works very well. Seems to be very accurate.

Agree w 2PMs. HomeDepot has this Water flow meter for about $16.

Fresh Water tank puzzle | Good Sam Community

BobKrogstie
Explorer
Aug 08, 2015
Does the fresh water fill neck go into the top of the tank or somewhere down the side of the tank? Manufacturers have been known to do some weird things. Just a SWAG.
GMandJM
Explorer
Aug 07, 2015
Agree w 2PMs. HomeDepot has this Water flow meter for about $16.
2PM_s
Explorer
Aug 07, 2015
You can get the $14.00 water meter from Amazon, works very well. Seems to be very accurate.
rockintom
Explorer
Aug 07, 2015
Agree with above. Maybe try to use something like a 5 or 6 gallon bucket to give you a better flow rating. One thing not to forget, is that when the claim is for a 90 gallon fresh water tank it is actually 80 gallons with 10 gallons of water for the water heater (assuming the W/H is 10 gal capacity). rockin'
TInmania
Explorer
Aug 07, 2015
Can you put more water in the tank after it overflowed? I know I am able to get more water in after the first "overflow." After the first overflow I reduce water pressure and it runs for some time.

Also, RV makers sometimes, if not often, include the capacity of the hot water tank when stating fresh water capacity. I believe in your case it is a 12 gallon hot water heater so if they counted that it would take capacity down to 56 gallons. (How you are ever supposed to use the water in hot water tank, without draining it, is beyond me.)

Mike
frizzen
Explorer
Aug 07, 2015
Pressure on municipal water systems isn't constant. Your test flow may have been at an unusually high demand time.

I minute for a gallon seems very slow

Forum Discussion

Fresh Water tank puzzle

About Fifth Wheel Group

Related Content

fresh water tank

Keeping fresh water fresh

best fresh water hose

Fresh water fill

Fresh water overflow?