Six more inspectors have been added to the agency that checks Washington’s 49,000 gas pumps to make sure people are getting all the gas for which they pay close to $4 a gallon.

According to officials with the state’s Weights and Measures Program, of 1,800 pumps checked in the first three months of the year, 94 percent passed inspection as being accurate. Of the 115 pumps that were inaccurate, there was about a 50-50 split between those giving less than they displayed and those giving more.

Inspectors take pumps out of service if they are giving customers less than they paid for.

The program is popular with station owners as well as consumers, because when inspectors find an error is in the customer’s favor, the state informs the station operator.

The program, which now has 14 inspectors, is paid for by an annual $10-per-pump fee paid by operators. Each pump is inspected about once every 28 months, but the inspectors also respond to citizen complaints.