Pentair Challenger/Waterfall 1/4-18 Clamp Knob (175025Z) miscvalves and R185B heater applications where

and R185B heater applications where the supported sealing points need fresh O-rings

The combination of recognizable LX branding

Matching the correct outdoor assembly helps preserve intended venting compatibility and supports cleaner service results

and 9350 cleaner applications where the wheel assembly at the front of the unit needs replacement

Pentair Challenger/Waterfall 1/4-18 Clamp Knob (175025Z) miscvalves and R185B heater applications whereThe clamp knob is a small but essential service part for securing the trap or clamp area on compatible Challenger and Waterfall pump assemblies. If the original knob is stripped, cracked, or missing, the assembly may be difficult to tighten correctly. This Pentair 1 4 18 replacement knob helps restore a secure, serviceable connection without replacing larger pump components unnecessarily. Replacement clamp knob for select Challenger Waterfall pumps