You can add a second bathroom sink by linking two sink drains to a single P-trap. You will need to join the P-trap to the drain opening in the wall using a trap arm pipe. You will also need to swap out the existing fixture shutoff valves with double-outlet shutoff valves. This will send water to two faucets.
Let's Get It Fixed!
Our virtual experts can diagnose your issue (for free!) and resolve simple problems.