I agree. This was great. I could see that the diaghram could be turned, but was afraid of breaking it. I was wondering if the seal can be changed. I can see mine torn.
The valve is fine. The replacement of the membrane is easy if there are no calcium deposits. However, when calcium deposits are present, the task is more difficult. I had take out the whole valve, soak it in vinegar, before I could do the replacement.
It's not always necessary to change the blue part with diaphragm (it costs about 15 euro), and changing the diaphragm do not resolve always the issue. I have adjusted the old diaphragm with silicon. Now it works fine
so i have two of these and they do adjust well. however they arent lasting as long as the older ones have been in since 2011... ;( whats the next updgrade?