Urethane Foam Pigs

Solid Cast Urethane Pigs

The originators of the Polly Pig, Knapp continues to lead the industry in manufacturing the most complete line of urethane foam bodied pigs.

Sphere Pigs

Knapp manufactures a comprehensive line of pipeline spheres that includes inflatable, solid cast urethane, solid cast with foam core, and a urethane foam series.

Metal Mandrel Pigs

Knapp manufactures a full line of metal mandrel pigs with replaceable urethane discs, cups and wire brushes.

Custom Designed Pigs

Knapp manufactures custom designed pigs for specific applications that require more from a pig than is offered by a standard "off-the-shelf" pigs.

Urethane Cups and Discs

Knapp manufactures all types of replacement cups and discs for any manufacturer's metal mandrel pipeline pigs.