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Do today’s energy-efficient drainage systems still need a sink trap?

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Correct Incorrect Sink traps are essential for keeping sewer gases out of your home. They also help block debris from backing up into your sink.

Do today’s energy-efficient drainage systems still need a sink trap?

• Yes, it is still essential.
• Yes, but only when the pipes are less than three inches in diameter.
• Yes, but only if there is no sink filter.
• No, you do not need one.