About 300 customers in the area along Old Haleakala Highway in Pukalani will be without water service from 9 p.m. Thursday to 5 a.m. Friday, the county announced.

The outage will occur while two fire hydrants are relocated on the sidewalk along the highway.

About 30 customers on Iolani Street in Pukalani were also without water on Tuesday for fire hydrant relocation work as part of the Iolani Street Pavement Reconstruction Project.