JM Eagle (California state) : The largest manufacturer of plastic pipe in the United States.

At its 22 plants in North America, the company manufactures polyvinyl chloride and high-density polyethylene pipe for a variety of industries including utility, plumbing, electrical, natural gas, irrigation, potable water, drainage and sewage.

JM Eagle employs more than 1,000 people at its corporate office and in its 20 plants located in 15 states and Mexico. JM Eagle is the World's Largest Plastic and PVC Pipe Manufacturer.

Today, donated JM Eagle pipe – 400 miles – is carrying clean water to nearly 200,000 people in eight countries in the Sub-Saharan region. Thanks to JM Eagle’s financial and product donations in Thailand, the villages of Santisuk and Pateung have received irrigation and clean drinking water. And JM Eagle’s donation of 45,600 feet of PVC pipe to construct an 8.5-mile pipeline now brings clean water to the people of Santa Cruz, Honduras.

According to wikipedia