Thanks for letting us know your gauge was off by 17 PSI. That is the only thing that made any sense. You will be surprised that it won't use any more energy even though it is running longer. Without a CSV the pump is cycles on at locked rotor amps and runs at full load amperage, then it is off for a certain period of time. With a CSV you save all those hard starts at locked rotor amperage, plus restriction from the CSV makes the pump run at lower amperage. Overall the electric bill will be about the same. The real savings is making the pump last longer by eliminating all the cycling. Making the pump last longer saves money directly from your pocket, plus it saves a lot of energy from mining, transporting, manufacturing, and installing additional pumps that you didn't have to purchase.