Flow Check Valve 40mm WatercoThe Flow Check Valve 40mm Waterco is a compact, serviceable safeguard for pool pumps and water systems, engineered to keep suction prime steady and prevent costly backflow. This 180 flow check valve is built to work across orientations and provide reliable protection where its most needed. Key features that matter 180 flow design operates reliably whether your plumbing runs vertically, horizontally, or even upside down, removing orientation as a