More than 10km (6.2 miles) of ageing water mains pipes in Cheltenham are to be replaced.
The £1.5m scheme is due to begin at the end of July and is expected to take about 12 months to complete.
Severn Trent Water said the pipes were old and prone to leaks and needed replacing to ensure customers received a "quality, uninterrupted" supply.
The company is staging an exhibition at Cheltenham Town Hall to explain and answer questions about the plans.
A spokesman said: "This is a good opportunity for people who may be affected by the resulting roadworks and traffic management requirements to drop in and find out more about what to expect."