Proper storage of your airless paint sprayer is critical to its overall life and can keep maintenance costs down. There are various methods for storing paint sprayers; different routines for various types of paint sprayers, numerous techniques for different time lengths of storage, a variety of methods for different spray materials.
In virtually all cases, the product to be used as a pump preserver is used ONLY in the pump; do not run the material through the hose and gun!
There are several pump preserver / protectant products available, we primarily use; Graco Pump Armor , Titan Liquid Shield, mineral spirits and mineral spirits with engine oil. Some paint sprayer storage products also protect against freezing and most of those are non-flammable.
These instructions are geared towards Graco Contractor Series Airless Paint Sprayers such as; STX, 390, Ultra, Ultra Max, Ultra Max II. If you have a Graco Magnum Series airless paint sprayer other than the 190ES, please disregard the portions referring to Throat Seal Liquid.
This guide is not a replacement for your airless paint sprayer manual!
Use standard safety precautions such as wearing eye protection, grounding equipment when using flammable materials and please dispose of waste material properly. See more about airless paint sprayer safety.
If your airless sprayer will be subject to freezing temperatures while being stored, choose a pump-preserver that will not freeze! We recommend; mineral spirits or mineral spirits & oil or Pump Armor (use full-strength to protect down to -30° F)
Thoroughly clean your airless sprayer prior to storage!
Using Pump Armor or other pump preserver - preserving the sprayer...
It really depends on who you talk to when it comes to preserving an airless sprayer. Even some sprayer manufacturers have different steps or methods depending on which manual or manual version you read.
Here's a basic way with two possible endings