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Frequently Asked Questions - Plugs

What is the difference between a Muni-Ball and a Test-Ball inflatable plugs?

I need to plug a 16" pipe but only have a 4" access hole. Is there a plug that will fit through a 4" opening?

We have a rehabilitation project planned and need to redirect or isolate the flow of the effluent. What do you suggest?

Can I place a plug in my line without having to enter into the manhole so I can avoid a confined space entry?

I need to make repairs to my system but I do not want to shut down the whole system. Is this possible?