My sump already has a bulkhead in it. I'm replacing it while I am working on everything (it looks rather old). The line size is 1".
Questions: (sorry there are so many)
Should I plug it and go to a submersible with the line out the top?
Should I use the hole with a submersible?
Should I go with an external pump (after replacing the bulkhead?
Is the Via Aqua an external or submersible?
What's the best submersible and the best external?
Am I right in assuming that I can just connect my pump to a split and run the hoses to the opposite corners for the returns?
Should I have a valve to be able to cut off the returns?
Any advice on a DIY