Some details that spoil everything ...

I have a valve outlet 18 in / 100, no connection is present in the product to adapt. Thank you to tell supplier minima for this type of coupling.

The documentation is not a technical documentation, so're doing to know the diameters of the different parts. It does not seem to me to be an insane work on the part of the supplier to provide a real documentation.

To all the commentators who have leakage problems, it's not complicated, connections are obviously too short to seal.

A word with joy I will modify my review as long as these problems are heard.

Thank you.