The answer to 'best drain trap' is that the best drain trap for most homeowners is a P-trap. A P-trap is a curved section of pipe installed under a sink or other fixture that holds water, creating a seal to prevent sewer gases from entering the home. P-traps are the most common and effective type of drain trap for residential plumbing.
P-traps work by creating a U-shaped bend in the pipe that traps a small amount of water. This water seal blocks sewer gases from coming back up through the drain and into the home. P-traps are easy to install, affordable, and require minimal maintenance, making them the ideal choice for most household drains.