Cherne Disc Seals are designed to block flow or provide bypass flow in underground pipes with a low backpressure. Used for pipe construction, rehabilitation, cleaning and testing, these plugs can be separated into two halves to effortlessly fit through any manhole.

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Yes. There is a video on the Cherne page on YouTube that demonstrates how a joint tester works. Owner’s Manuals with specific instructions on assembling and using Cherne Joint Testers can be found in technical section of the Cherne website.

Smoke bombs have a one year shelf life from the date of manufacture. The shelf life on the mineral oil used in liquid smoke is indefinite.