The answer to 'P-trap no hot water' is that a lack of hot water flow through the P-trap can be caused by a few common issues. This could be due to a problem with the water heater, a clogged or damaged pipe, or an issue with the P-trap itself.
Some common symptoms include lukewarm or no hot water coming from the faucet, slow drainage, or water pooling under the sink. Solutions may involve adjusting the water heater, clearing a clogged pipe, or replacing a faulty P-trap. For most homeowners, simple DIY troubleshooting and repairs may be possible, but for more complex issues, it's best to call in a professional plumber.