Hello, I am trying to pass two 15mm central heating pipes through a space where any potential leakage will be difficult to detect and replace. For this reason I am also trying to avoid joints where possible, however, while bending a pipe to 45 degree with spring I managed to put a small kink on the inside radius. Any comment on how severe is this kink and how likely this might fail in the coming years? Pipe is new with no other damage. Thank you.