2 very trustworthy engineering types I know (N. Spy as posting earlier) have recommended ball valves or similar over gate valves...while they both "may" work.... I'd lean to the ball valves if you need something to limit the flow.
Bronze and cupronickel sit in seawater for many decades ...maybe a century or more if isolated properly or with similar metal...hard to imagine a regular fresh water flush does much more than help with the occasional marine buildup (not corrosion)...which should be done just to flush scale, etc out every decade or so.
|