Hi, I thought I put a closure to this thread. I have finally sorted my air leakage problem after a lot of patient waiting for my tools and spending a fortune!
Tools I need:
Zodiac Z7056 (Chiavi : Chiave smontaggio ghiera valvola a scomparsa z7056
Zodiac Z7057 (Ricambi : Chiave smontaggio membrane valvola a scomparsa z7057
In summary, there were 2 problems:
1. The big cap was leaking air on the side when tightening. So require a new cap, which also comes with a collar that you tighten on the inner valve under the fabric.
2. The collar was also leaking air and that also require tightening, hence the tool.
My first suspicion on the inner valve was wrong but I already bought the Z7056.
After all, I am glad that I managed to fix the problem myself but whether it's worth the money/time, this really depends how deep is your pocket/how busy you are in life!?
Anyway, if anyone needs any help with Zodiac recessed valve, please let me know and I am willing to help/share as leaky valve is very distressing! For me certainly.