The first rule of hydraulic engineering: water doesn’t flow uphill.
It’s possible your PW pump can suction lift some difference in water level but unless the manufacturer specs it I’d try to avoid it if at all possible.
If your tank has a bottom outlet use it. Keep it higher than your pump’s inlet and keep the tubing runs moving downhill.
If you must feed out of the top of your tank you may be able to get it to siphon water as long as the run ends up below the tank level and you figure out a way to prime the siphon every time you use it.
PC.