Franz Heymann wrote:

snip

Are all Gardena and Hozelock components really interchangeable? You
mean that I may now happily cease to remember whether I am looking
for a Hozelock or a Gardena fitting when I need a replacement?

............. I'm sure they weren't at one time.
I somehow doubt that they have agreed to a common standard.
That would mean one of them re-tooling and scrapping stocks of old
spares.

--
ned