The answer to 'P-trap frozen' is that a frozen p-trap is a common plumbing issue that can occur during cold weather. The p-trap is the curved section of pipe under a sink or floor drain that holds water to prevent sewer gases from entering the home. When the water in the p-trap freezes, it can cause a blockage and prevent proper drainage.
Some common causes of a frozen p-trap include inadequate insulation, drafty areas, and extended periods of below-freezing temperatures. Symptoms may include slow or no drainage, gurgling sounds, or water backing up in the sink or floor drain. Solutions can include applying heat to thaw the trap, insulating the pipes, or in severe cases, replacing the p-trap.