Recent content by Rob243

Ah! Great explanation! This also explains why thermal expansion tank is needed. If both inlet and outlet pressure are high, the valve remains closed. I guess it would really depend upon the difference in outlet vs inlet pressure, but since these aren't fixed there is no way to guarantee that...

Thanks for the detailed explanation! So to summarize, the increased inlet pressure can cause backflow, but usually it won't. Or is the the other way round?

I am scratching my head on this question. PRV is supposed to create a closed system requiring a thermal expansion tank. But at the same time PRV is not considered a backflow preventer. How can both be true?