jim wrote:
Try getting the tank pumped out or put some chemical treatment down it
perhaps it is gotten inactive due to lack of use

forgot to add some pertinent information......

darin feild outlet seems to be draining correctly, tank was pumped out
before purchase (paid for by me) and the house was not ocupied for
approx 6 months before we purchased.

and some websites say that chem treatments are nothing more than snake
oil. aside from that SWMBO purchased a bottle of such stuff to see if
it does work or not.