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The cost
effective solution to sealing empty duct is the  ®
Knock-in Blank Plug. Simply pressed or knocked into the duct,
this tamper resistant plugs creates an air and water tight
seal and provides sustained hydrostatic pressure
of 35 P.S.I..
The integral
rope tie provides a secure anchor point for tape or rope.
Manufactured from high density polyethylene, the ®
Knock-in Plug is corrosion resistant and is not effected by
extreme hot or cold temperatures.
®
Knock-in Plugs are available as standard for SDR 9 and 11
duct. Other SDR sizes are available by request. In addition
a variety of different colors are available for easy duct
identification.
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