Learn more about your plumbing at: www.crcplumbin... In this video, Charles from CRC Plumbing explains how thermal expansion tanks on water heaters work.
Finally, a talk about these tanks which include a diagram of what's going on. Here's the thing I'm still unclear about: Is the pressure reducer (between the city water supply and the building) acting as a back-flow preventer? First, I can't imagine how you could make a reducer which _didn't_ also have this "check-valve" behavior, and, second, if it didn't work like this, then the thermal expansion could just flow back to the city water main, so there'd be no need for the compensator tank.
So I just replaced My pressure regulator because of high pressure readings. When I leave the pressure reading meter on overnight, I'm still getting high pressure. I do not have an Expansion tank on my HWH. SO you can still get high readings even with a pressure regulator then?
Finally, a talk about these tanks which include a diagram of what's going on. Here's the thing I'm still unclear about: Is the pressure reducer (between the city water supply and the building) acting as a back-flow preventer? First, I can't imagine how you could make a reducer which _didn't_ also have this "check-valve" behavior, and, second, if it didn't work like this, then the thermal expansion could just flow back to the city water main, so there'd be no need for the compensator tank.
So I just replaced My pressure regulator because of high pressure readings. When I leave the pressure reading meter on overnight, I'm still getting high pressure. I do not have an Expansion tank on my HWH. SO you can still get high readings even with a pressure regulator then?
as your water heater makes hot water in a closed loop system thermal expansion will increase pressure in your system.
lol