Two wall drains, one sink drain. Anyone know the purpose? : r/Plumbing

Price: $ 24.00

4.5(125)

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1-1/2 in. Plastic Wall Tube features polypropylene plastic construction with a quarter bend configuration for use in tubular drain installations. This

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P-Trap Installation Drain Doesn't Line Up Bathroom Sink Pipe

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Can I run a sink drain along walls to reach where the sink used to be