I don't have any faults, apart from one pinhole.
The transfer hose with nine fixes is a seperate issue.It kinks and then deforms and tears. Minus temps don't help.It's 3/4 and of the see through type.
Sean while i do figure a lot of things out from first principles it's always easier to be told if someone has already solved it.At the moment i'm thinking what malc said, put some glue in the hole and then bind very tight with tape.Every now and again you do get a surprise when someone suggests a fix and you think of course, why didn't i think of that.
Connectors don't work in my experience because they don't like being pulled hard and also with a hot system the constant hot/cold tends to move and loosen things.