Any Plumbers here? Got a quick shower/hot water heater question

[Tokyo Slim]

Originally Posted by CityConnection

The only thing I can think of is...

Your hot water pipe and cold water pipes run parallel and close to one another. The cold water is warming up from the heat of the cold water pipe.

Highly unlikely.

 

[CityConnection]

Originally Posted by Tokyo Slim

Highly unlikely.
*edit* The cold water is warming up from the heat of the HOT water pipe. hahaha... I worked with a contractor for sometime and we have seen it before. But whatever, I'm probably wrong...

 

[Tokyo Slim]

Even if that was the case, which would, as I mentioned, would be extremely unlikely (your hot water pipe would have to be dangerously hot) - it would result in about five seconds of "warm" water comin from the cold water pipe. As soon as cold water started flowing through the pipe, it would be cold. It takes much more energy to heat water inside a pipe indirectly than would be logically available in your hot water pipe.

 

[CityConnection]

Originally Posted by Tokyo Slim

Even if that was the case, which would, as I mentioned, would be extremely unlikely (your hot water pipe would have to be dangerously hot) - it would result in about five seconds of "warm" water comin from the cold water pipe. As soon as cold water started flowing through the pipe, it would be cold. It takes much more energy to heat water inside a pipe indirectly than would be logically available in your hot water pipe.

True. But he says that he turns off the shower, so the water is still.

I dont know. Im just saying its a possibility. Good luck finding the answer!

 

[Tokyo Slim]

Yeah, but he also said his water starts off cold, and then warms up as he runs it. Your scenario would cause the exact opposite of that.