Jandy | R0480400 | Pro Series Diffuser & Impeller Hardware

The Jandy R0480400 Diffuser & Impeller Hardware Kit is a genuine OEM service kit designed for Pro Series FloPro pumps. It includes a precision-molded diffuser, back-plate O-ring, screws and a screw with O-ring to restore proper hydraulic alignment, sealing and long-term performance.

Key Features

• Genuine Jandy OEM replacement kit. Jandy R0480400 Diffuser & Impeller Hardware Kit

• Compatible with Jandy/FloPro VS Series and FHPM Series pumps (e.g., VS-FHP1.0, VS-FHP2.0, VSFHP165, VSFHP270, FHPM). 

• Kit includes diffuser, back-plate O-ring, two 4-40 × 1.375″ screws, and one screw with integrated O-ring. 

• Designed to restore correct impeller alignment and diffuser positioning to maintain optimal flow and efficiency.

• Made with corrosion-resistant materials suited for pool and spa environments.

• Direct-fit installation minimizes downtime and ensures return to factory-spec performance.

Product Overview
The R0480400 hardware kit addresses common performance issues in Pro Series FloPro pumps such as reduced flow, increased vibration or leaking due to worn or misaligned diffuser or mounting hardware. The diffuser plays a pivotal role in directing flow from the impeller into the volute, and proper sealing via the O-ring ensures there is no bypass or erosion of flow efficiency. Over time, the original diffuser or mounting screws may wear, strip, or the O-ring may degrade, leading to diminished hydraulic performance or noise. Installing the kit restores the integrity of the hydraulic path, ensures the impeller remains correctly positioned, and prevents leakage around the back-plate. For service technicians and pool professionals, this kit is essential when performing pump rebuilds or scheduled maintenance on FloPro VS or FHPM models.