We live in Southern California and our water pressure must be over 90 psi. We have used the Staypoollizer with a water regulator for over 5 + years. Every year or so the water regulator would just stop regulating. This would make the Staypoollizer overfill and give us the notice to once again replace the water regulator. With the new Nxgen upgraded tank assembly it just works . No more water regulator, no more worries. Thanks Staypoollizer team job well done !