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The SIOUX CHIEF 631xg02fp is a lead-free water heater connector elbow designed for 3/4-inch PEX crimp-to-female iron pipe (FIP) swivel installations. It incorporates an integrated ball valve for shutoff control directly at the connection point. The brass FIP swivel nut includes a gasket and functions as a dielectric fitting, helping to limit galvanic corrosion between dissimilar metals at the water heater connection. Overall dimensions are 3 inches by 6 inches. Licensed plumbers and water heater installers work with this fitting during water heater replacement or new installation in residential and light commercial applications.
This connector elbow is used where a PEX supply line meets a water heater tank inlet or outlet port with a female threaded connection. The elbow geometry accommodates tight spaces typical of water heater closets and utility rooms. The integrated ball valve allows the installer or service tech to isolate the water heater without shutting off the main supply. The dielectric swivel nut reduces the risk of corrosion at the transition between the PEX line and the water heater fitting, which is a common failure point on older installations.
Designed as an OEM-style replacement or new-installation fitting for 3/4-inch PEX plumbing systems connecting to water heaters with 3/4-inch female iron pipe threaded ports.
Installation is performed by a licensed plumber in accordance with the International Plumbing Code (IPC) and applicable local amendments. Shut off the cold water supply and drain the system before making or breaking any connections. Use a calibrated PEX crimp tool with the correct 3/4-inch die to seat the crimp ring fully — verify the connection with a go/no-go gauge before pressurizing. Do not over-torque the swivel nut; hand-tighten then apply moderate wrench pressure only, as the gasket provides the seal.
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