Cherne 271578 Test Plug

Plug was used to stop hot air draft in summer seems to have worked well.

fit perfectly after forcing it into the 6 inch space. Opened up and held it's place with hand tightening.outstanding solution, saving a bypass valve replacement.

This product is good for the price - it definitely does the job. The only problem I've had with it is that the metal "ears" on the tighteners are made of pot metal. It takes more force than your fingers can provide to tighten the plugs, so pliers or some other aid are required and after several uses one of the tabs broke off. I expect the others to break as well, since the pot metal is weak. I can still use the plugs with pliers. It's too bad, as all other aspects of the plugs are fine.

I used them on both sides of my tumbler pipe and no leaks at all...Price was great to..

Needed a plug to seal the chimney smoke pipe hole after removing the furnace...this fit the bill! Would recommend!

It's hard to find a 6" test plug, for some reason. This worked nicely to seal a floor drain pipe in a hundred year old basement. Seems well made, expanded without issue. Would recommend.

Good for plugging access ports that might get wet from the outside. It keeps the rain out. Works in standing water.

Too expensive