Standard units with 55 or 100 gallon tanks. Relief valve adjustable between 50-125 psi. Steep pump curve allows for pressure settings up to 100 psi. Adjustable pressure switch with 30-150 psi set point range, 5-30 psi dead band and visible range scale.
Zestimates: Improving accuracy. Zillow says Zestimates currently have a median error rate of 8%. That may seem to be a large margin â but it has improved. The algorithm began with a 13.6% median error rate in 2006, according to Zillow. However, error rates can vary widely, depending on where you live.
Generally, Zillowâs predicted market value is not any better now than it was 18 months ago. The Zestimate is within 5 percent of the actual sales price roughly half the time. In September 2012, the Zestimate was just as likely to be too low as too high; now, it is roughly twice as likely to be too low.