Polaris Zodiac 3900 Rear Axle Block (39-430) safety Use part number C86 to

Use part number C86 to help match this item to the correct cleaner model

A tailpiece with split nut helps create a more service-friendly plumbing connection at the heater

or no longer returns properly after an air signal

Vacless Systems Elbow [Fit-10] (FIT-10) is a replacement elbow used with compatible Vacless vacuum release system installations

so replacing the correct matching component helps preserve the original skimmer design

Polaris Zodiac 3900 Rear Axle Block (39-430) safety Use part number C86 toThe Polaris Zodiac Axle Block [3900 Rear] (39 430) is a replacement axle block for compatible Polaris and Zodiac pool cleaners. This component helps position and support the cleaner axle so the wheel assembly can track properly during normal operation. When an axle block becomes worn, cracked, or distorted, the cleaner may move unevenly, lose traction, or place extra stress on surrounding drive parts. Replacing the damaged block helps restore a more