Polaris Zodiac 3900 Rear Axle Block (39-430) safety A tailpiece with split nut

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

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

This control helps manage the air introduced into the spa system

Useful when replacing a damaged or worn original grid

or no longer returns properly after an air signal

Polaris Zodiac 3900 Rear Axle Block (39-430) safety A tailpiece with split nutThe 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