Polaris 3900 Sport Rear Axle Block Assembly | 39-430 Bio-Dex Phosphate Removers Includes O-ring for secure

Includes O-ring for secure

environmentally safe

The integrated Venturi design uses a dual‑orifice flow path to produce a laminar stream and draw ambient water through pinholes on top of the head—lifting fine debris and assisting overall system circulation

The majority of the parts included with this assembly are black except for the restrictor disks which are blue and red

It also prevents the sweep hose from spraying any windows or the pool deck while the cleaner performs its tasks

Polaris 3900 Sport Rear Axle Block Assembly | 39-430 Bio-Dex Phosphate Removers Includes O-ring for securePolaris 3900 Sport Rear Axle Block Assembly (39 430) The rear axle block assembly is a replacement part made by Polaris for the 3900 Sport. It is also made from the same high grade material used to make the original factory part. Making this a genuine OEM part you can trust. This axle assembly was designed to be one of two axle assemblys needed to house the internal parts as well as external parts that aid in the maneuverability of the cleaner. Such