P-trap and Lip on drain

Can you install a bathroom P-Trap backwards?

What is a lip on a kitchen drain line and is this lip visible?

Answer #1

Hi,

Did you ask this at Bobvilla and get the response that they didn’t know? I just found this exact question there.

From my research, no one has mentioned the topic of installing a P-Trap backwards. Is there a special reason you want to? It doesn’t seem like a normal request.

The lip is usually about 1.5’’ and is visible from underneath, to my knowledge .

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