Repairs on a 20-inch water main break in Waimanalo have stretched on for a week, according to the Honolulu Board of Water Supply.

Crews are reinforcing sections of the main to ensure there are no additional leaks at 41-1606 Kalanianaole Highway by Shima’s Supermarket, Board of Water Supply officials said. The work is expected to continue at least through the rest of today, a spokesman said.

In the meantime, bypasses have been installed, and most customers should have water service at lower-than-normal water pressure. Residents in agricultural lots should also be receiving water. BWS said its staff are investigating areas with no water service.

The bypasses remain in effect until 8 p.m. today and until further notice to allow the repairs to continue, officials said.

Residents are encouraged to use water for essential needs only, such as for showers, cooking, and sanitation needs, and should fill water containers for use when the bypass is off.

BWS will use a fire pumper at 41-1702 Kumuniu St. to help move water to residents in agricultural lots that have low pressure. The fire pumper will run until 8 p.m. or until the main break is repaired.

Crews are working in the eastbound lane of Kalanianaole Highway near the Mekia Street intersection, and eastbound traffic on Kalanianaole will be contraflowed into a middle turn lane to allow one open lane of traffic in each direction. Motorists are advised to avoid the area or use an alternate travel route if possible.

Kumuhau Street will be closed between Humuniki and Kumuniu street until 8 p.m. Motorists can access Kumuhau Street via Poalima Street.

Water wagons have been set up at four locations, and a roving water wagon is available by calling 748-5000, ext. 1. Waimanalo customers with no water service may call 748-5041 for assistance.