GRACO Plug, Meter, Output - (SKU: 557901)The GRACO 557901 is a plug designed for use as a manifold outlet plug for injectors in lubrication systems. It is a small, precision engineered component intended to seal or cap off output ports on meters or manifolds within GRACO industrial lubrication equipment. Material is not explicitly specified in available sources, but it is typically made from durable metals or engineered plastics suitable for industrial environments. Key Features: Plug 557901

SST (specific to GRACO spray equipment)

Disconnect power and relieve system pressure before installation

It is intended for use with GRACO Mark IV sprayers

Replace the seat kit at recommended intervals or when leaks or performance issues are detected

model 25C484)

Its material and specific function within the equipment are not detailed in the available information

The GRACO 287228 is a fluid needle repair kit designed to restore the performance of GRACO spray guns by replacing critical internal components

and is intended for use in industrial and commercial DEF dispensing applications

Used for the maintenance and repair of GRACO GL-33 series injectors in medium-duty lubrication systems

Using genuine GRACO labels ensures correct information and compatibility with equipment

Regularly inspect and replace the filter as needed to maintain water quality and equipment performance

and other sanitary industries for connecting air or fluid lines in GRACO SaniForce pump systems