The answer to 'lifespan of P-trap' is that a properly installed P-trap typically lasts 20-30 years or more with proper maintenance. P-traps are the U-shaped pipe under sinks that prevent sewer gases from entering the home and also catch debris that could clog the drain. With regular cleaning and occasional tightening, a P-trap can provide decades of reliable service.
P-traps are made of durable materials like PVC, ABS, or chrome-plated brass that resist corrosion and wear. As long as the trap is not damaged or leaking, it should continue functioning well for many years. However, over time the rubber washers and seals can deteriorate, requiring replacement of the entire P-trap assembly.