Graco 206996 Throat Seal Liquid Fluid - 1 Gallon Noise_61 dBA For example

For example

Devilbiss check valve assembly kit

the fluid hose attaches directly to the gun

Binks packing nut

Graco 206996 Throat Seal Liquid Fluid - 1 Gallon Noise_61 dBA For exampleProduct Description Throat Seal Liquid (TSL) prevents paint and coatings from drying onto the displacement rod and packings, extending the life of the pump. Maintaining your pump is essential for long life and reliability. One of the most important sprayer components is the pump. TSL is specifically formulated to protect the piston and packing from corrosion and drying out keeping your sprayer functioning as designed. They extend pump life and assure