I recently shut off the water main to the house to repair a leaky downstairs shower. When I finished and turned the water back on, I found that only my kitchen, which is upstairs and nearly directly over the water heater, was getting hot water. Other spouts in the house would run warm water for a few seconds and then go cold, while the kitchen continues to get a steady flow of very hot water. Pressure in all spouts is strong.
The house was built in the 1950s. The piping is simple, with one hot water source out of the water heater immediately going to a “T”, turning left to feed the upstairs kitchen and right to feed the rest of the house. No anti scalding valves that I am aware of. Water heater is about 10 years old. Everything worked perfectly before.
Faucets are a mix of single and double handle, makes no difference. It’s very confusing that water flows freely yet is cold, when the only source is the hot water heater. The line coming out of the water heater is quite hot. I need Colombo here.