Drain Cleaner or Plumber for slow drains?

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Unalkia
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Location: San Francisco

Drain Cleaner or Plumber for slow drains?

Postby Unalkia » Fri Jan 04, 2019 12:12 pm

Sometimes our sink or bathtub drain will slow. I have used liquid drain cleaners which seems to work on our plastic piping. However, I heard a plumber say that drain cleaners are dangerous and damages the plumbing https://mechanicguides.com/best-tool-bag-for-plumbers/ . 

Does anyone know the answer? My investing mistakes have made me skeptical about other things. Image 

Thank you and best wishes.
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