Amazon.com: FangKingNo10pcs 3/4" White PVC Pipe Coupling Adapter Pipe Fittings (Slip to Slip) Schedule 40 Easy to Install,and High Tensile for Home or Industrial Use (1 Pack of 10pcs) (0.75 Inch) :
SharkBite 3/4-in Push-to-Connect x 3/4-in MNPT Slip Male Adapter in the Push to Connect Fittings department at Lowes.com