new proportioning valve leaking
I have seen this issue posted previously about the inline tube piece. Find another copper washer and try again. There must be an issue with the washer they are using.
I'm swapping to disc brakes. I installed my new Inline Tube proportioning valve, connected all the lines, went to bleed the system and found fluid leaking out from the base of the hexagonal piece on top where the front brake line comes in from the master cylinder (see picture). Has anyone else had this problem? I tried tightening the hex part, but it seems pretty tight already.
I have seen this issue posted previously about the inline tube piece. Find another copper washer and try again. There must be an issue with the washer they are using.