fskyz

Hi all, I was deriving to work one day and a steel break pipe snapped. since repairing the pipe I have not been able to get a solid break pedal again, it keeps sinking to the floor. we've bled the breaks about 7 times now using a bout a litre per time. we've pressure bled the system, we've manually bled the system calliper by calliper and also connected airlines to nipples to suck the air out. after all attempts and replacing the master cylinder we still can not get a normal break pedal. I have put HEL braided lines on the car as well in the process. has anyone got any idea or came across this issue before?