There have been no changes in water pressure, no. The problem will be the years that the boiler has and that diaphragm that has never been changed. He is already 13 years old. Enough to last.
Thanks for answering. I will change the diaphragm and comment the result.
Indeed, I advanced the diaphragm and had a small fissure. It has been to put a new and solved membrane. Thank you.