I discovered a tiny puddle under the drivers side (LHD) door this morning, and soon after I got the low brake fluid warning light.. I was waiting for it, so not a huge surprise.

I'm gonna have to bite the bullet and make the brake lines for the big rangie.
I'm going with copper tubing, but what diameter pipe should I use, and which thread connections should I get?
I remember there was a great thread/guide somewhere here on fullfatrr but I can't seem to find it.

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Silly me..
Thanks for pointing me in the right direction Stan.!

Cunifer, an alloy of copper (Cu) nickel (Ni) and iron (fer) is the best choice, rather than pure copper.
Buy a roll, (plenty on eBay) and they will outlive the car.
Mike. G reg 2.5VM Vogue Portofino red 1991- 1999
V reg 2.5td P38 Rioja red 1999- 2006
53 reg td6 Vogue Oslo blue 2006- 2015
11 reg 4.4 TdV8 Vogue SE. Baltic blue 2015- date.
https://www.fullfatrr.com/forum/topic56162...tty+affair

Does anyone know the dimensions of the "larger" fittings?

http://www.fullfatrr.com/forum/topic25799.html
Mike. G reg 2.5VM Vogue Portofino red 1991- 1999
V reg 2.5td P38 Rioja red 1999- 2006
53 reg td6 Vogue Oslo blue 2006- 2015
11 reg 4.4 TdV8 Vogue SE. Baltic blue 2015- date.
https://www.fullfatrr.com/forum/topic56162...tty+affair

Yes, I found the guide.
It didn't say what size the large fittings are though.

Larger unions are M12 x 1. Smaller ones are M10 x 1.

I have recently replaced all the brake pipes. I needed 2 rolls of Cunifer 3/16 or 4.8mm as the front to rear pipes are quite long and if you make a mistake there is insufficient in one roll (guess how I know!).

I split the rear pipes in to 2 pieces with a joiner in just in front of the rear wheel arch where there is an access plate on the fuel tank guard so the joint can be inspected. 2011 4.4 TDV8