Knapp Pipeline Cleaners

Nova-Cast Pig
Cast Urethane Pigs

Metal Mandrel Pigs
Metal Mandrel Pigs
Blackbelt Pig
Urethane Foam Pigs
Pipeline Spheres
Custom Pipeline Pig
Custom Design Pigs
Pipeline Cups and Discs
Cups and Discs

Pipeline Pig Catalogs

Group of Sphere Pigs

Alll Pigs Logo

Urethane Spheres

Urethane Foam Sphere Pig

Urethane Foam Sphere Pigs

Based on an exclusive, proprietary urethane foam system developed by Knapp, our complete line of urethane foam-bodied spheres are the toughest in the industry.
Wire Brush Sphere

Wire Brush Sphere Pigs

By design a sphere has only a small amount of its' surface in contact; great for flexibility, but not good for cleaning.  For the operator that needs cleaning as well, Knapp's foam-bodied steel wire brush spheres are the answer.

Inflatable Sphere Pigs

Inflatable Sphere Pigs

Available in five different formulations, Knapp's inflatable urethane spheres are manufactured with the highest quality urethane elastomer systems to give the operator peak performance and reliability.


Polly Sphere Pig

Polly Sphere Pigs

Knapp's patented urethane foam-core Polly Cast Spheres offer long life plus flexibility. Unlike inflatable spheres, these spheres won't blow-out or deflate in the line.

Tethered Sphere Pigs

Custom Sphere Pigs

Knapp is internationally known for its' innovative, hand-crafted, one-of-a-kind spheres and pigs for unusual and line-specific applications.

SOP Sphere Pig


Pipeline Cleaning Pigs
Knapp Polly Pig,Inc.
1209 Hardy Street
Houston, TX 77020
713 222-0146
800 231-7205

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