The Honolulu Board of Water Supply is asking residents from Honokai Hale to Makaha to conserve water overnight tomorrow. Crews will be working on a planned water main connection as part of its Farrington Highway Phase 1 water system improvement project.

The work will begin about 9 p.m. tomorrow and is expected to take about 10 hours to complete. The Board of Water Supply will fill reservoirs along the Leeward Coast before the closure so that customers will continue to have water service.

However, the 24-inch water main that brings approximately 60 percent of the water to the Leeward Coast will not be in service while crews are making the connection. The Board of Water Supply asks residents to use water sparingly during that time and only for priority needs such as cooking, drinking and personal hygiene.