This knob fits the following Pentair filter models:
- Posi-Flo® II Cartridge Filter Model PTM 135 Series
- Cristal-Flo® High-Rate Sand Filter
- Max-E-Glas®/Dura-Glas® Series
- Intellipro® VS 3050 Pump
- Max-E-Pro Series
- Waterford® Sand Filter For Systems Manufactured Before 2009, Separation Tank Assembly
- Max-E
