This is a follow up on the thread how to refill Vaillant Turbomax 824E //www.diynot.com/forums/plumbing/how-to-refill-vaillant-turbomax-824e.317627/
There is only one screw valve and not two like all the other guides I have read.
There is only one screw valve and not two like all the other guides I have read.