I talked to my neighbor and he's having the same issues. I bought a pressure gauge from Home Depot and hooked it up. My pressure sits at about 60 PSI, then suddenly spikes to 120 PSI, then goes back down to 60. 120 PSI is a lot higher than normal water pressure and can cause damage to more than just my RO unit (water heaters, etc.). I'll be calling NBU in the morning. If you're having the same issue, I would get one of those gauges and check it out. It didn't seem like the pressure was getting higher, it seemed like it was getting lower but that is clearly not the case.