When we arrived the recirculation pump had no power. We found a gfci reset on a nearby outlet and reset the gfci. After about 30 seconds the pump lost power again. We reset outlet, unplugged the pump and used an outlet tester. This outlet tested as normal. We replaced the pump with a grundfos alpha smart pump. This new pump is not causing the gfci to trip. Pressure in the home was 90 psi. We installed a new pressure reducing valve and pressure is now 60psi