I have a gas water heater inside my home at the moment. I am planning for the work to remove it, and install a new electrical tank-based water heater, at a different location. The new location is just on the opposite wall of the current location. It already has hot water and cold water pipes (that are currently simple taps). These pipes are the same diameters as the pipes currently going in and out of the current was water heater.
My plan is to close the pipes that are currently going in and out of the gas water heater (with a simple cap - I do not have the skills to properly crush them with a machine, and there is not enough space to do so). The length of these pipes will therefore become unused.
I am not sure how this will play out, but I imagine this could result in the length of these 2 pipes containing stagnant water : they will be filled in the first time I turn water on after installation of the new, electrical, water heater and then the water in there might not ever be used because it's a dead end.
Should I be concerned about that?
Here's a picture of the current gas water heater: