Geniescience
Homeowner
3/4" pipe
the pipe is OK. the green stuff is corrosion, the equivalent to rust but for copper.
i'd replace the copper pipes with 3/4" just to have that extra volume. If I read you right, you are comfortable with soldering. One size larger pipe and you get more flow, and quieter flow noises. Filling a tub can take time, so a larger pipe is a good thing. If the pipe is larger only in one segment of the whole run, that is not a problem.
As for tankless, I have used a gas powered tankless and enjoyed it. Even the noise was pleasant. I was a guest, not an owner. I have always owned electric HW heaters. To me, the repair that will one day be necessary is the big concern. Everything needs service and repair, within a matter of years.
David
the pipe is OK. the green stuff is corrosion, the equivalent to rust but for copper.
i'd replace the copper pipes with 3/4" just to have that extra volume. If I read you right, you are comfortable with soldering. One size larger pipe and you get more flow, and quieter flow noises. Filling a tub can take time, so a larger pipe is a good thing. If the pipe is larger only in one segment of the whole run, that is not a problem.
As for tankless, I have used a gas powered tankless and enjoyed it. Even the noise was pleasant. I was a guest, not an owner. I have always owned electric HW heaters. To me, the repair that will one day be necessary is the big concern. Everything needs service and repair, within a matter of years.
David