100K potentiometer fits Nilfisk-Advance Convertamax 28, 34, Convertamatic 24, 26, 28, 32 (all variants), Warrior 28, 32 (all variants), Adhancer 28, 32, Adphibian and AquaPlus.
Below are other options that may meet your needs. Alternatives include lower cost items, genuine OEM parts and items will ship from other locations so you can consolidate your shipping and minimize expense.