Part # 4686-03
Manufacturer Code 31935-0001
Dimensions 10-1/2" ID, 1/4"
Alternate Part #'s 171021108, 31935, 31935-0001, 319350001, O-419, O419, STA0512721
INSIDE DIAMETER: 10-1/2" OUTSIDE DIAMETER: 11" CORD THICKNESS: 1/4"
Please note, the O-ring (25230-0010s) will interchange with the O-Ring installed on the Sta-Rite Posi-Flo II Cartridge- PTM 50, 70, 100
If you order the O-ring (31935-0001) you may receive the O-ring (25230-0010s)
Sta-Rite Posi-Flo II Cartridge - Model PTM 135
In the past I have changed the bottom O-ring. Should I also be changing the upper body O rings in 23 years? The upper body is not leaking.
If the o-ring is not leaking, then there is no need for you to replace it.