Only 7 would sound fuel pump, not the FRPS. The sensor read 7 and you manually got 7, so it's working.
Pull the line before the Fuel Filter and see if that makes a difference. Hell, just replace the Fuel Filter being you're right there.
If there's no change you're going to be replacing the pump. How you want to go about that is up to you; cut an access hole or drop the tank.
Just make sure the pump you buy has the spring top (update pump).
Don't "think outside the box".
There is no box.
Do it correct, or do it twice.