In faq it says presure would vary 10prc. If it has to do with exp. tank. It seems for me that we have a bigger problem. Any short comment why you think its exp vessel.
Hello,
we have been having problem with our boiler pressure. It goes down to zero almost twice a day, we refill it ourselvs. There are no visible leakege. Any ideas what can cause such problem.?
:?