1" x 3/4" x 1" pex barbed tee
These fittings are for pex pipe ASTM F876/F877 1" OD x .875" ID approx.
Used for potable water,hot water heating,geothermal and solar thermal systems.
Requires clamp ring CCR100 or SSCR 100
Also used for wall mount heater take off- wall cabinet heater or base boards