Welcome to AA....I just noticed you weren't the OP on this thread.
DO NOT use a pump to draw water into your sump. It won't work and even trying it can and most likely will lead to a disaster.
Let's step back a bit.
I made a 90 gallon acrylic tank,....
Did you actually make this yourself or did you buy it? Is this a Reef Ready tank? Where is the drain line and return line drilled?
The plumbing to and from the sump is pretty simple. Your return line is 3/4", so use 3/4" ID pvc
or clear tubing and go from the pump to the bulkhead. Use whatever adapters you may need to match up the pump outlet with the 3/4" line...if necessary.
The drain line is 1", so use 1" ID pvc
or 1" flexible drain line from HD or Lowes and just go directly from the bulkhead into the sump.
You can use ball valves if you want. I have them, but never use them. You can take a look at my build thread (link is below) and see how I did my plumbing.