My water heater’s relief valve is dripping. Cause for concern?

[LSLGuy]

Here’s a current thread on the topic of slow hot water, long pipe runs, etc. You might gain from this one, or piggyback onto it.

Plumbing for hot water

In my old house, getting hot water in the bathroom upstairs took a long time. I presume that best practices is to split the pipe from the water heater and send one pipe directly to the upstairs bathroom so you can have a nice shower, one pipe goes to the kitchen and from there. I think that my old house had like one pipe that went all around, which might save on buying pipe but is annoying for getting hot water where you want when you want it. This is silly, but my sweetheart and I disagree on w…