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.
To measure the accuracy of the Zestimate Zillow compares the actual home sale prices of homes with their Zestimate and theyâve found that the Zesimtate is within 5% of the actual sale price around 33% of the time and within 10% of the sale price around 50% of the time. The actual data for each city can be found here.