Non return valve. How does a check valve work?

[@milosdinicnigoselektronik6499]

First of all i want a say hello :) . I have one question , if the pump is on the off mode did the valve leak hot water (60 degrees) . Thank you advance

[@RamzAntiTodo]

Thank you for the explanation. Good job!

[@35730able]

The flow arrow is wrong on the casing at 35 second stream

[@randomstuff23453]

so can I open my check valve to replace the rubber?

[@Гидравликаипневматика]

I opened such a valve, but it is assembled with a thread lock, it is very difficult to unscrew it.

[@35730able]

The flow arrow is wrong marked on the casing at 35 second stream

[@Гидравликаипневматика]

Yes, my mistake

[@mekhanik1796]

😍🔝