Polaris Zodiac 3900 Single-Side Wheel (39-401) cmp this Waterway internal is a

this Waterway internal is a practical replacement when a threaded 3-3/8 inch twin roto smooth-face insert in gray and stainless is needed

Application-specific design

That helps restore the lift system with a more complete and organized replacement solution

and debris-handling performance

Polaris Zodiac 3900 Single-Side Wheel (39-401) cmp this Waterway internal is aThe Polaris 3900 relies on its wheel system to translate internal drive power into steady movement across the pool. This single side wheel is a direct replacement for service situations where an existing wheel is worn, damaged, or no longer helping the cleaner track correctly. Replacing a problem wheel can help restore the cleaners climbing ability, turning behavior, and overall coverage. It is a focused repair part that supports the larger drive