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Black rubber pneumatic test plug with metal valve and tether strap, cylindrical shape tapering from 3 to 4 inch range

Safe-T-Seal

Safe-T-Seal TP34SB Pneumatic Test Plug 3" to 4

SKU CH-KM4K-0EXS9

Pneumatic rubber test plug seals 3 in to 4 in pipe IDs, inflates to 12 in length, rated 57 psi air and 30 ft water head

  • Fits 3" to 4" pipes with 2.67" deflated diameter
  • Inflates to 12" length for secure sealing
  • Handles up to 57 psi air back pressure
  • Withstands 30 ft of water head pressure
  • Female 23/64" NPT air connection for inflation

Safe-T-Seal TP34SB Pneumatic Test Plug

The Safe-T-Seal TP34SB is a pneumatic test plug designed to seal pipes with inside diameters ranging from 0.38 in to 4 in. It suits plumbers and contractors who need a reliable temporary blockage for pressure testing drainage or sewer lines.

Single-chamber rubber body with NPT air connection

The smooth rubber body deflates to a 2.67 in diameter and 9 in length for insertion, then inflates to a 12 in length to form a tight seal. A female 23/64 in NPT air connection accepts standard inflation hoses, while the integrated handle and strap provide a secure tether during use.

Rated for 57 psi air and 30 ft water back pressure

The single inflation chamber holds up to 57 psi of air pressure or 30 ft of water head, covering typical low-pressure test requirements. No additional accessories or software are bundled; the plug arrives ready to connect to the user's existing inflation equipment.

How it compares

Measured against everything we stock in Pumps, Sprayers & Pump Accessories, at today’s prices. Recalculated every night.

Price $38.99
Typical for this category: the median of 962 items is $38.99.

Specifications

Product
Brand nameSAFE-T-SEAL

Questions about this item

What NPT thread size does the 23/64 in air connection use?

The air connection is a 23/64 in female NPT fitting for attaching an inflation hose.

What pipe inside diameters will the 2.67 in deflated diameter fit through?

It fits pipes with a minimum inside diameter of 0.38 in and a maximum of 4 in.

How do you inflate the single chamber and what pressure limit applies?

Connect to the female NPT port, inflate to the 57 psi maximum air back pressure, and secure the tether handle.

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