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.
Zillow, founded 10 years ago, freely acknowledges its Zestimates are just estimates. In fact, it goes further, giving detailed locality-by-locality information on how off they are. Nationwide, Zestimates are off by 8 percent on average, Zillow says. In Pennsylvania, the accuracy is worse: 8.7 percent. But in Lancaster County, itâs better: 7 percent, on average. Individual Zestimates can be off by a lot more than the average.