I wanted to take out, clean and put back in the little anti-vac from my Londinium R24:
Since it's tucked in on the boiler near pipes, a spanner has no room to pull left and right and I went out to get a 17mm socket, 1/2" square drive, an extender and a breaker bar (in Dutch a 1/2 inch 17mm dopsleutel, cardan verlengstuk, schuifgreep).
That made it an easy task and fun to do.
