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

Polly Pigs

Alll Pigs Logo

Polly Pigs
Pipeline Utility Pigs

Knapp, the original manufacturer of the Polly Pig internal pipeline cleaner, has been building the highest quality urethane foam cleaners for over 45 years from the same location in Houston, Texas.



Red Criss Cross Pig

Red Series Polly Pigs

The Red Series pig bodies are made with Knapp's rugged and dependable K-Lite urethane foam. K-lite is a medium-density (7 to 8 lb/ft3) foam; the Red Series pigs are available with assorted coatings and scraper elements to perform the utility function required of the pig.

Blue Criss Cross Pig

Blue Series Polly Pigs

Knapp's Blue Series pigs use the same basic K-Lite foam system as the well-known Red Series. With Knapp's unique ability to blend our own foam sytems, we alter the formulation of the urethane foam to make it softer, lighter (5 to 6 lb/ft3) and more flexible. The coating used for the Blue Series is also softer and more flexible than that found on the Red Series. The same coating patterns and scraper elements are available for the Blue Series.

CCrimson Series Pigs

Crimson Series Polly Pigs

The Crimson Series pigs use Knapp's K-Duro, our toughest and longest-wearing foam. K-Duro is a heavy-density (9 to 10 lb/ft3) foam ideal for pigs that have to travel long distances or perform hard scraping duty. The Crimson Series is available with the same coating patterns and scraper elements as the Red Series.


Stud Pipeline Cleaner Pig

Maximum Cleaning Series Polly Pigs

The Maximum Cleaning Series pigs use both Knapp's K-Lite and K-Duro urethane foam bodies. Depending upon the particular application, straps of urethane scraper blades, steel wire brushs, silicone carbide chips, or hardened steel studs are applied to the pig bodies to produce the ultimate in scraping and flexibility.

Swab pipeline pig

Swab Series Polly Pigs

The Swab Series pigs use Knapp's lightest-density (1 to 2 lb/ft3) foam body with the same coating patterns and scraper elements aavialble for our other Polly Pigs.

Polly Pig Options

Polly Pig Options

All Knapp Polly Pigs are available with performance-enhancing options such as double-dished ends and pig tracking adapters to fit all manufacturers locating equipment. Please consult Knapp with your specific requirements.

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

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