The Emfuleni Municipality in the Vaal, south of Johannesburg, is expected to shut down the water supply in Bedworthpark, Sharpeville, and Vanderbijlpark Friday morning from 5am until Saturday morning at 10am.
The municipality says the aim of the shutdown is to improve plant reliability and efficiency at the Lethabo Rand Water Pumping Station.
Municipal spokesperson Mojalefa Radebe says water tankers will be dispatched to affected areas.
