The Originators Of The Polly Pig, Knapp Continues To Lead The Industry In Manufacturing The Most Complete Line Of Urethane Foam Bodied Pigs.

Knapp’s patented single-piece, bi-directional scraping pipeline pig.  The K-Disc is unmatched for paraffin scraping ability.

Solid cast urethane combination cup and disc scraping pipeline pig.

Nova System Pig

Knapp’s solid cast urethane pipeline pig with replaceable wear parts.

Knapp’s patented one-piece, solid cast urethane pipeline pig designed for pipeline-specific applications.

Solid cast urethane cup and disc fluid control pipeline pig.

Solid Cast Urethane Disc Pig

Knapp, the original manufacturer of the solid cast urethane disc pig, has been producing this dependable line of bi-directional solid cast pipeline pigs for more than 25 years.


Knapp’s solid cast urethane three-cup batching, cleaning and fluid control pipeline pig.