Join Date: Aug 2008
Location: OC NJ
Thanked 9 Times in 9 Posts
Rep Power: 9
Re: WTF is this?
With only one connection, a rheostat isn't doing anything.....
It may be that the box was reconfigured at some point, and it was left in.
As far as 'could there be' questions...there are others here far more familiar with common and uncommon practices who could give better advice.
You may just have to fill the holding tank to see what happens.....