Part # 31935-0001
Alternate Part #'s 17-102-1033, APCO2252, PEN31935-0001, STA-051-2504
Do you get three o-rings for $15.99? Three are needed for the pool equipment.
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Hello Becky. If your filter is a Sta-Rite Posi-Flo II Model PTM 135, the o-ring requirement is 2 qty 31934-0001 and 1 qty STWC9-3. Attached please find an exploded parts diagram for the Posi-Flo II Model PTM 135. Model PTM 135 Sta-Rite Posi-Flo II Models PTM 50,70,100 require 1 qty 31935-0001 and 1 qty STWC9-3. Attached please find an exploded parts diagram for Models PTM 50,70,100. PTM 50, 70, 100 O-rings are presented as a quantity of 1 (one).
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