The ProFlex Style 750 inline check valve from Proco Products is designed for heavy-duty water/wastewater applications where elements such as abrasive slurries or sludge are present. The enclosed body check valve has a maintenance-free design with no hinges or seals to bind or freeze. No external power sources are required. It has low headloss with a full port design, which opens with minimal head pressure and closes with any back pressure exerted on the valve. It is provided with two clean-out ports and is made of carbon steel with an epoxy coating. The bolting dimensions are in accordance with ANSI 125/150 patterns. 800/344-3246; www.procoproducts.com.