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Subject:
Re: OT, Old cast iron pipe clogging question?

Steve D, CT
Blocked venting can also cause issues with slow draining. My BIL had a blockage from squirrels dropping walnuts down a vent.

I had a camera in my drain when I was putting a porch on my house. Once there is a porch, replacing a drain is much more difficult. In my case there were no roots (no trees in front) but the pipes were clay and 80 years old so we did the drain replacement.

The camera was $150 or less if I remember correctly and a good investment. A finished basement will be destroyed if you get a blockage in the main drain to the sewer. Your problem is likely not in the main drain if only one sink is draining slowly.

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