Sta-Rite Posi-Flo PTM50, PTM70, PTM100 Filter O-ring Rebuild Kit 8-801 Sta-Rite Posi-Flo PTM50, PTM70, PTM100 Filter O-ring Rebuild Kit 8-801 StaRite Posi-Flo Filter O-ring Kit Fits: PTM50, PTM70, PTM100 Models Upper O-ring & Lower O-ring (Lube NOT Included) Be sure to check your pump model to ensure correct fit, please use a good lube for proper seal