Waterway Plastics 672-3000 Ozone Injector - Barb to 3/8 inch Barb

What This Part Is Used For
This O-Ring seals the volute housing on compatible Waterway pool and spa pumps. It creates a pressure-tight seal between the pump body and volute assembly. The seal prevents leaks at one of the highest-stress joints in the pump. Proper sealing is critical for maintaining flow efficiency and pump prime. This part restores the original factory seal between housing components.

Why This Part Matters
A failed volute O-Ring often causes visible leaks and air infiltration. Even small leaks can reduce pump performance and increase noise. Continued operation with a compromised seal can lead to motor damage or overheating. Replacing the O-Ring restores hydraulic integrity without replacing the entire pump. Correct sizing ensures uniform compression and long-term reliability.

Key Features and Specifications

• Waterway Plastics manufacturer part number 805-0261
• O-Ring size designation #261
• Designed for pump volute sealing
• Used on select Waterway pump models
• Maintains pressure between pump housing components
• Round profile O-Ring design
• Single replacement seal
• Service replacement component

Installation and Fitment Guidance
Disassemble the pump according to manufacturer procedures. Inspect the volute groove for debris or damage before installation. Light lubrication may be used to assist proper seating. Tighten fasteners evenly to avoid housing distortion. Confirm by manufacturer part number before ordering.

About the Waterway Plastics Brand
Waterway Plastics designs pump systems trusted throughout the pool and spa industry. Their volutes and sealing systems are engineered for precise alignment and pressure control. OEM manufacturers frequently specify Waterway pumps for new installations. Replacement parts are built to match original tolerances. This consistency simplifies service work. Waterway continues to set industry standards for reliability.

Common Service Context
This O-Ring is commonly replaced during pump rebuilds or seal kit installations. Technicians encounter it when addressing leaks between pump sections. It is also replaced during motor swaps or housing separation. Water around the volute seam is a typical indicator.