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The UPONOR Q2237557 is a 3/4-inch flow-through tee fitting designed for use with ProPEX expansion-style PEX piping systems. Manufactured from polysulfone, this tee connects three runs of PEX tubing in a flow-through configuration, allowing one continuous run to pass through while a branch is tapped off the side. Licensed plumbers and PEX installation crews install this fitting during rough-in and remodel work on domestic water distribution systems. The polysulfone construction provides chemical resistance and long-term durability appropriate for potable water service.
This fitting is intended for residential and light commercial domestic water supply applications where ProPEX expansion connections are specified. It is suited for cold and hot water distribution lines within a structure. The flow-through tee format is commonly used in home-run and trunk-and-branch manifold layouts where a main line must continue past a branch takeoff point without requiring additional couplings.
Designed as an OEM-style ProPEX fitting for use with 3/4-inch PEX-a tubing in domestic cold and hot water distribution systems using the ProPEX expansion connection method.
Installation should be performed by a licensed plumber in accordance with local plumbing codes and the applicable IPC or UPC requirements. Shut off the water supply and depressurize the line before cutting into any existing pipe. ProPEX expansion connections require a calibrated expansion tool sized for 3/4-inch fittings; allow the expanded PEX ring to contract fully onto the fitting before pressurizing. Inspect the connection for full seating before closing walls or returning the system to service.
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