Check out the schedule 80 fittings available at PVC Fittings Direct. Schedule 80 fittings have a thicker wall than schedule 40, making them supportive of higher water pressure. This is a 4" Schedule 80 PVC Tee with socket x fipt ends.
Size: 4"
Schedule: 80
End Type: Socket x Fipt
Max Temperature: 140F
Standards: ASTM D-1784
Listing: ASTM D-1784, NSF for potable water services