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Plastic Oddities

Finger Hold Test Cap

Finger Hold Test Cap


Regular price $12.96
Regular price Sale price $12.96
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Choose the Pipe Fit size

Knock out test caps are a solvent weld test cap designed for use on SCH 40 DWV or sewer piping for leak testing. Manufactured and assembled in the USA by Plastic Oddities, “Friend of the Plumber”.  The polystyrene test caps are available in four different sizes. Quality Plastic Oddities parts – since 1975.



  • Finger-hold molded in for solvent application
  • Polystyrene test caps solvent weld to SCH 40 DWV or sewer pipe for leak testing
  • Made in the USA



  • Available in 1.5”, 2”, 3”, or 4” sizes.

          1.5” knock-out test cap

          2” knock-out test cap

          3” knock-out test cap

          4” knock-out test cap

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