Just started bleeding brakes and have sprung a leak
Using Golf pressure switch in a 4 way union. They are both M10. The switch cannot be tapered as has tightenen all the way down.
Solutions anyone?
Different switch or PTFE tape?

Duel, dias bar brake system

i'd guess the switch is a bad fit for the connector, so either get a different switch, a different union, or maybe chamfer it a bit.

PTFE might work but i suspect its more desirable to have a good natural fit to start with.

bear in mind i havent touched my brakes yet, nor ever in fact...

put a copper washer under the switch body