Jerry Simon 13 Report post Posted June 14, 2017 Why would one tie the two bleed valves together, with a ball-valve in the middle of the pipe? (No signs of a *looped* system.) Share this post Link to post Share on other sites
Erby 14 Report post Posted June 18, 2017 Is the supply plumbed series or parallel? Share this post Link to post Share on other sites
Jerry Simon 13 Report post Posted June 19, 2017 Series Share this post Link to post Share on other sites
Charlie R 2 Report post Posted June 19, 2017 That does tie the two tanks together and the cut-off allows you to stop that flow. Certainly unorthodox way of doing this. Share this post Link to post Share on other sites
Marc 36 Report post Posted June 19, 2017 Doesn't make any sense. That tie in doesn't let you drain both tanks. You still need to open each bib at the bottom to do that. I doubt the manufacturer intended these two tanks to be installed in series. That HWH design doesn't lend well to a series connection. Expect hot water pressure regulation issues. Share this post Link to post Share on other sites
Jerry Simon 13 Report post Posted June 19, 2017 7 hours ago, Marc said: I doubt the manufacturer intended these two tanks to be installed in series. Not that it makes a difference (or does it?), but I erred when I said in-series. The heaters are piped in-parallel. Share this post Link to post Share on other sites
Jim Katen 44 Report post Posted June 19, 2017 2 hours ago, Jerry Simon said: Not that it makes a difference (or does it?), but I erred when I said in-series. The heaters are piped in-parallel. If they're in parallel, then someone might have been trying to equalize the pressure between the two tanks so that they'd get equal flow from both. I'm not sure it would work, but that might be what they were trying to do. Share this post Link to post Share on other sites
