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Black rubber mechanical pipe plug with yellow polypropylene end plates and handle, 3.5 inches tall

Cherne

Cherne 271408 Mechanical Pipe Plug 4 in

SKU CH-SJCZ-N34K1 MPN 271408

Mechanical pipe plug seals 4 in pipes from 3.87 to 4.09 in ID, rated for 13 psi air or 30 ft water head

  • TypeDrain Components
  • Withstands 13 psi air back-pressure for reliable line testing
  • Holds 30 ft water head during hydrostatic checks
  • Fits 3.87–4.09 in ID pipe range for secure sealing
  • Polypropylene handle and plate resist corrosion in wet environments
  • Compact 3.5 in height allows use in tight access points

4-inch Mechanical Pipe Plug

The Cherne 271408 is a mechanical pipe plug designed for 4-inch nominal pipe sizes. It fits inside diameters from 3.87 inches to 4.09 inches and uses natural rubber sealing with polypropylene plates and handle. The plug is intended for temporary flow stoppage or testing in plumbing and drainage systems.

Check pipe dimensions and pressure needs

Verify the pipe inside diameter falls between 3.87 and 4.09 inches before ordering. The plug withstands up to 13 psi air back pressure and 30 feet of water head. No bypass connection or water fill port is included, so plan for separate inflation or monitoring equipment if required.

Suits pressure testing and temporary blockage

This plug suits technicians performing low-pressure air or water tests on 4-inch lines. It is not for buyers needing a bypass to divert flow, a built-in inflation valve, or a plug rated for higher back pressures. Long-term installation or high-pressure mains testing are outside its rated limits.

Highlights

  • Withstands 13 psi air back-pressure for reliable line testing
  • Holds 30 ft water head during hydrostatic checks
  • Fits 3.87–4.09 in ID pipe range for secure sealing
  • Polypropylene handle and plate resist corrosion in wet environments
  • Compact 3.5 in height allows use in tight access points

Specifications

TypeDrain Components
BrandCherne Industries
Model271408

Questions about this item

What comes with the 271408 mechanical plug and what must be purchased separately?

The plug includes a polypropylene handle and plate with a 3.5 in overall height; a water fill port and hose are not included.

Which 271408 version fits a 4 in pipe with an inside diameter between 3.87 in and 4.09 in?

This model is sized for 4 in nominal pipe and seals inside diameters from 3.87 in to 4.09 in.

What does the 13 psi air and 30 ft of head water back-pressure rating mean when the plug is installed?

It holds up to 13 psi of air pressure or a 30 ft water column when properly seated in the specified diameter range.

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