hi, i am trying to put in new brake fluid in my car and to do this i need to flush the old one. so i took of the nipple off one caliper and there is a little nut. my question was how do i remove it? what do i use an allan key or what? i have standard subaru newage 4 pots.

Thankyou

 

nipple on standard 4pots is a spanner job, cant remember if its 8 or 10mm. use a good ring spanner. use some wd40 if its stuck. shove the hose on the nipple part and bleed away

 

cheers mate. is it true that you can flush all the fluid through one caliper and do i need to top it up as we go along and not let it go below minimum.