1977 Barth has 2 Water tanks in the rear of the coach. We filled them & they filled 3/4 on one and about 1/2 on the other. Is this normal? Should I be able to fill these to the brim? Thanks in advance!!

There's usually a common fill pipe for both of them. Is the valve for both open? Is there any obstruction?

thanks, will try to figure out the valves. there are three of the valves between tanks, but everytime I opened them, the water would start to drain on the ground. will let you know how it goes,. thanks again

Try just opening the middle-one and see if they will equalize.

I'm going to fill my tanks tonight, so I will deliberately get them off-kilter and let you know what I did to equalize-them.

We opened all three one at a time and the third one did not drain the water. We will check it out in the morning and see if there is any change. We'll let you know what happens. thanks