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Cherne 271735 8 inch monitor well NBR trap, plastic and rubber with stainless steel handle

Cherne

Cherne 271735 8 in Monitor Well NBR Trap

SKU CH-WBR0-P3FB3 MPN 271735

An 8-inch pipe plug with a stainless-steel handle rated for 15 ft of water head and 6.5 psi air pressure

  • Product typeDrain Components
  • Handles 15 ft of head water pressure for reliable pipe testing
  • Withstands 6.5 psi air back pressure during line isolation
  • Fits 8 in pipes with 7.76 in to 8.03 in inside diameter range
  • Stainless steel handle resists corrosion in harsh environments
  • Compact 3.98 in height allows use in tight access spaces

8 in Monitor Well NBR Trap

The Cherne 271735 is a blocking plug designed for 8 in monitor wells and pipes. It fits inside diameters between 7.76 in and 8.03 in and uses an NBR rubber seal with a plastic plate and stainless steel handle. The unit is rated for 15 ft of water head and 6.5 psi of air back pressure. It installs without a bypass connection or included water fill port.

Plumbers and maintenance crews

This plug suits technicians who need a reliable seal for pressure testing or temporary blockage in 8 in lines. The padlockable handle allows lockout procedures for safety compliance. It will not work for pipes outside the 7.76 in to 8.03 in range or for applications requiring a built-in bypass or hose connection for water filling. Buyers needing larger diameters or integrated bypass flow should look at other equipment.

7.76 in to 8.03 in inside diameter range

The decisive specification is the pipe inside diameter the plug can seal. The Cherne 271735 covers only the 7.76 in to 8.03 in window for an 8 in nominal pipe size. Confirm the exact pipe ID before ordering; a mismatch means the plug cannot achieve its rated 15 ft head or 6.5 psi performance.

How it compares

Measured against everything we stock in Drain Stoppers, Strainers & Traps, at today’s prices. Recalculated every night.

Price $105.99
Pricier than about 78% of the 4,240 comparable items (median $31.99).

Specifications

Product
Brand nameCherne
Model name271735
Product typeDrain Components

Questions about this item

What pipe inside diameter range must my existing 8 in pipe fall within for the Cherne 271735 plug to seal?

The plug seals pipes with an inside diameter between 7.76 in and 8.03 in, matching the stated 8 in pipe size range.

Will the 6.5 psi air back-pressure rating hold when I test older cast-iron lines that may leak at lower pressure?

The plug is rated for 6.5 psi maximum air back pressure and 15 ft of head for water, so it will hold at or below those limits on older lines.

How can I confirm the stainless-steel handle and water-fill port are seated correctly after I insert the plug?

The handle should sit flush at the 3.98 in overall height and the padlock shackle opening of 3 1/2 in should be accessible for lock-out verification.

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