GRACO Piston Injector, PD, Cast Without Nipple - (SKU: 122889) and a 5-ball check valve

and a 5-ball check valve configuration

UL (for standard Husky 1050 series)[2][5]

The GRACO 650139 Husky 1050P-E is an air-operated double diaphragm pump constructed with a polypropylene body and Buna (nitrile) diaphragms and balls

Inspect all components in the kit before installation

Regularly inspect the bearing and sleeve for signs of wear or damage

GRACO Piston Injector, PD, Cast Without Nipple - (SKU: 122889) and a 5-ball check valveThe GRACO 122889 is a piston distributor style injector designed for single line lubrication systems. It is constructed from cast material for durability and is engineered for heavy duty performance. Its primary function is to meter and distribute lubricant efficiently within GRACO automatic lubrication equipment. Key Features: Piston Injector (Piston Distributor) PD, Cast Without Nipple, 3900 (specific size not detailed) Cast material Designed for