How to Unclog the Main Household Drain | Lowe's
https://www.lowes.com/n/how-to/unclog-main-drain-line
WEBUpdated March 28, 2023. By Marc McCollough. A clog in your plumbing often affects a single sink, tub, shower or toilet, but if more than one fixture is backed up, you may need to clean out the main drain line. Understanding the basics of a drainage clean-out is essential to get your plumbing back in working order.
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