Place the sump pit liner into the sump pit so that it is level with the basement floor. Fill the liner with several inches of gravel.
Place a smooth stone paver over the gravel so that it is reasonably level. Lower the pump onto the paver, and make sure that it sits securely without rocking. Remove the pump and paver, and smooth out the gravel if the pump is not steady.
Connect the check valve and PVC pipe to the sump pump. Make a hole in a nearby wall with a hole saw. Run the PVC pipe through this hole to outside the house.
Mix some concrete in a wheelbarrow with a hoe. Spread the concrete around the sump pump liner with a trowel, and let it harden overnight.
Connect the sump pump's power. Slip the check valve through the slot in the sump pump's cover. Gently lower the cover into place over the sump pump basin. Check that the cover is on tightly.