ATLANTA — The Home Depot announced in mid-July that it has entered into an agreement to acquire National Waterworks Holdings, a leading distributor of products used to build, repair and maintain water and wastewater transmission systems. National Waterworks, based in Waco, Texas, will operate as part of The Home Depot Supply.

National Waterworks has a 14% share of the estimated $11 billion water and wastewater transmission equipment distribution business. The company distributes a full line of pipes, fittings, valves, meters, fire hydrants, service and repair products and other components that are used to transport water to and from residential and commercial locations.

Through its network of more than 130 branches in 36 states, National Waterworks sells directly to municipalities and contractors. For the fiscal year ended Dec. 31, 2004, it had net sales of $1.5 billion.

In recent years, Home Depot has pursued markets that serve such business-to-business customers as maintenance and repair professionals, and home and commercial builders.