Knock Out Test Plugs

Our full line of Made in the U.S.A. inset Knock Out Test Plugs are designed for easy and economical leak testing of your plumbing system before final installation. Plugs can be knocked out with a hammer once testing is completed.

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RMC Knock Out Test Plugs

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  • Use with Schedule 40 ABS or PVC DWV piping.
  • Multiple sizes to fit your pipe.
  • Test plug is solvent welded into the pipe end.
  • Knock out center.
  • Made with high impact polystyrene. This product can expose you to chemicals including styrene, which is known to the State of California to cause cancer, and birth defects or other reproductive harm.
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  • Also prevents debris from entering plumbing system during construction.
Part # Description A-Bottom Diameter B-Top Diameter L-Length Burst Pressure Rating Carton Quantity
KOP-1500 1.5” Knock-Out Test Plug 1.58″ 1.87″ 0.33″ 240 psi 5,000
KOP-2000 2.0” Knock-Out Test Plug 2.05″ 2.34″ 0.33″ 140 psi 5,000
KOP-3000 3.0” Knock-Out Test Plug 3.05″ 3.48″ 0.37″ 60 psi 2,400
KOP-4000 4.0” Knock-Out Test Plug 4.00″ 4.47″ 0.43″ 35 psi 1,200

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