Peggy,
I have a RONCO tank that I installed in 2002. I has worked very well.
Except for the pump out suction. I had the tank built with the input
on the top along with the vent. The discharge fitting is installed at
the bottom of the tank.

I have had some trouble getting it completely pumped out. I have read
that you have recommended having the pump out fitting from the top via
a dip tube. I think that I can accomplish this change. I have one
question though.

How close to the bottom should the tube be to get the most complete
pup out? Also is the tube straight down or is there any holes in the
side of it near the bottom?

Thanks,