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

Ultra-Flex pipeline pig

Alll Pigs Logo

Pipeline Utility Pigs

Ultra-Flex pipeline pig


The Ultra-Flex pipeline pig was designed with flexible urethane cups and discs so that can pass easily through pipeline joints, valves and bends.

Ultra-Flex pipeline pig B

One-piece design

Economical one-piece construction means no costly
spare parts to inventory or lose in the line

Ultra-Flex pipeline pig C

Light weight

Lighter than conventional metal pigs, the Knapp Ultra-Flex does not sacrifice strength or endurance for the convenience of light weight.


Ultra-Flex pipeline pig

Hollow core

The hollow body of the Ultra-Flex pipeline pig expands with line pressure to further improve the pig’s seal.

Ultra-Flex 2-Cup

Ultra-Flex® Options

The Ultra-Flex pipeline pig is also available with an additional cup on the front of the pig to accommodate eccentric launchers.  The Ultra-Flex can be ordered with handling strap and various trackiing options.

Ultra-Flex B2

Available in Ultrathane®

Knapp’s Ultrathane is a premium grade polyurethane elastomer custom formulated for specific job requirements.

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

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