Assuming your pump is a single-stage centrifugal, like the Irri-Gator from Goulds, you will be lacking the "brute force" pressure that deep-well submersible pumps possess, that allow them to fully open a standard pressure relief valve. It might be more rewarding to use a small pressure tank and pressure switch, to make something like a self-contained water supply out of your pump.
More work, and more money, but certainty has its price.