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The LEGEND VALVE 523S04 is a 3/4-inch PVC check valve with slip-style end connections, designed to allow one-directional flow and prevent backflow in piping systems. PVC construction makes it suitable for corrosive or chemically aggressive media where metal valves would be unsuitable. This type of valve is a standard component in plumbing, irrigation, and light commercial piping systems. Installation is typically performed by licensed plumbers or experienced pipefitters working on residential or light commercial water distribution, chemical feed, or recirculation lines.
The 523S04 is well suited for low-pressure water service, irrigation manifolds, chemical treatment systems, and other applications where backflow prevention is required without the need for a metal body. The slip connection style accepts solvent-weld PVC pipe, which keeps installation straightforward and compatible with standard Schedule 40 PVC piping practice. It is a common choice in pool and spa plumbing, hydronic systems, and general water service lines where PVC piping is already in use.
Designed as an OEM-style replacement or new-installation check valve for 3/4-inch Schedule 40 PVC slip-connect piping systems in residential and light commercial plumbing, irrigation, and pool applications.
Installation is performed by a licensed plumber or qualified pipefitter. Shut off the water supply and relieve system pressure before cutting into any existing line. Use appropriate PVC primer and solvent cement per local plumbing code requirements, referencing IPC guidelines for solvent-welded joints. Allow full cure time before restoring flow and pressure-testing the assembly.
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