Piggable paint systems can provide a huge cost savings for any paint facility. A piggable system that is designed properly will enable the user to have a color to color flush with virtually no material waste, and a minimal amount of solvent waste.
The difference between piggable systems and conventional systems is in the amount of material that is saved. In a conventional system, when a color change is made, there can be 1-1/2 to 2 gallons of paint wasted, plus the solvent used to purge the system. On a piggable system, a small plastic or foam pig is inserted into the paint line to keep the materials separate and to recover all the material remaining in the line.