The 4" Socket White PVC Utility Spring Check Valve with an EPDM seat is engineered for high performance across various applications, including landscape, irrigation, pool and spa, aquaculture, OEM, and general purposes. This maintenance-free sealed unit features a long-life EPDM elastomer seat with a weighted disc for full-flow with minimal restriction and positive shutoff. Constructed from chemical and corrosion-resistant PVC, it is NSF certified for potable water use and suitable for both horizontal and vertical up-flow installations, as well as vacuum service. Engineered for maximum flow, quick response, and reliable shutoff, this valve combines durability with a compact, space-saving design.