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Cherne mechanical pipe plug, 8 inch, ABS plastic and rubber with zinc handle

Cherne

Cherne 270288 Mechanical Pipe Plug 8 in Trap

SKU CH-7R84-47GDQ MPN 270288

Mechanical pipe plug seals 8-inch pipes from 7.7 to 8.03 inches ID, rated for 17 psi air or 40 ft water head

  • TypeDrain Components
  • MaterialHAWA
  • Seals pipes from 7.7 to 8.03 in inside diameter
  • Withstands 17 psi air back pressure for reliable testing
  • Handles 40 ft of water head for hydrostatic tests
  • Zinc handle and ABS plate resist corrosion in wet sites
  • Compact 3.75 in height fits tight access points

Mechanical Pipe Plug, 8 in Trap

This mechanical pipe plug seals 8-inch pipes from the inside using a zinc handle and ABS plate with a rubber seal. It fits pipe inside diameters between 7.7 in and 8.03 in and stands 3.75 in tall overall. The plug is designed for temporary line testing and isolation in plumbing systems. No bypass connection or water fill port is included with this unit.

Suited for pressure testing and blockage

Plumbers and contractors performing air or water pressure tests on 8-inch lines will find this plug matches the required diameter range and pressure ratings. It handles up to 17 psi air back pressure and 40 ft of head water back pressure. Buyers needing a bypass port for flow diversion or a padlock shackle for lockout-tagout security should look at other models. The plug seals strictly inside the pipe and has no external anchoring features.

7.7 in to 8.03 in pipe ID range

The decisive specification is the allowable pipe inside diameter window of 7.7 in minimum to 8.03 in maximum. If the pipe ID falls outside this range the plug will not seal or cannot be inserted. Verify the exact internal diameter of the target pipe before purchase. The 8-inch nominal size alone does not guarantee fit.

Highlights

  • Seals pipes from 7.7 to 8.03 in inside diameter
  • Withstands 17 psi air back pressure for reliable testing
  • Handles 40 ft of water head for hydrostatic tests
  • Zinc handle and ABS plate resist corrosion in wet sites
  • Compact 3.75 in height fits tight access points

Specifications

TypeDrain Components
MaterialHAWA
BrandCherne Industries
Model270288

Questions about this item

Does the rubber seal on the Cherne 270288 plug degrade and need periodic replacement?

The rubber seal is a wear item; inspect it before each use and replace it if you see cracks, cuts or loss of elasticity.

What back-pressure limit will the 8-inch mechanical plug reach first during a long water test?

The plug is rated for 40 ft of head water back pressure; sustained pressure above that can unseat the seal.

How hot does the zinc handle get when the plug stays in an 8-inch pipe carrying warm water all day?

The zinc handle conducts heat but stays near water temperature; it will not become too hot to touch under normal conditions.

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