Brake pipe and fitting sizes

andydunn2 · 09-05-14, 03:41 PM

Ok can't remember what the pipe and fitting sizes are on a B4

Do any of you learned people know of the top of your head as I have a couple of seized fittings going onto flexis that I need to change.

Cheers
Andy

John. · 09-05-14, 04:21 PM

3/16" will be the pipe size and they'll be metric thread size. Not sure what else you'd need to know?

andydunn2 · 09-05-14, 07:11 PM

Quote:

Originally Posted by John.

3/16" will be the pipe size and they'll be metric thread size. Not sure what else you'd need to know?

Cheers John that's all I needed

Stanson · 09-05-14, 07:12 PM

As mentioned above, pipe is 3/16" or 4.75mm (5mm also fits without any problems) and fittings have metric M10x1 thread.

andydunn2 · 09-05-14, 07:13 PM

Quote:

Originally Posted by Stanson

As mentioned above, pipe is 3/16" or 4.75mm (5mm also fits without any problems) and fittings have metric M10x1 thread.

Perfect thank you

tractor Dave · 11-05-20, 04:45 PM

Can someone recommended quality brake pipe fittings please? The stuff I have recently bought on eBay has been rubbish. I need a 3/16 female straight union m10 x1
The ones I have bought will not seal as the seats are badly formed. Alternatively, a good compression connector for joining 3/16 pipe

John. · 11-05-20, 05:52 PM

Go to a motor factors that deal with the trade.....and you'll get decent fittings.

I can't think of a brand name , sorry.

tractor Dave · 11-05-20, 06:33 PM

Quote:

Originally Posted by John.

Go to a motor factors that deal with the trade.....and you'll get decent fittings.

I can't think of a brand name , sorry.

Thanks John, sound advice but difficult in the current circumstances, especially when you live in the back of beyond!

John. · 11-05-20, 07:06 PM

Could you maybe use a suitably sized drill to reface the seat that seals with the pipe??

tractor Dave · 11-05-20, 07:15 PM

Quote:

Originally Posted by John.

Could you maybe use a suitably sized drill to reface the seat that seals with the pipe??

I did try that but the drill profile didn't match very well.

I have ordered some UK made brass fittings from AUTOMEC. They were not cheap but are apparently good quality.
https://automec.co.uk/

09-05-14, 04:21 PM	#2
John. 4 ring whore! Classic Audi Club Member Join Date: Mar 2011 Location: Scottish Borders. Posts: 7,535	3/16" will be the pipe size and they'll be metric thread size. Not sure what else you'd need to know?

09-05-14, 07:12 PM	#4
Stanson Grown up member Join Date: May 2013 Location: Dmitrov, Moscow province, RU Posts: 57	As mentioned above, pipe is 3/16" or 4.75mm (5mm also fits without any problems) and fittings have metric M10x1 thread.

11-05-20, 04:45 PM	#6
tractor Dave Senior Member Classic Audi Club Member Join Date: Apr 2018 Location: Wales Posts: 1,174	Can someone recommended quality brake pipe fittings please? The stuff I have recently bought on eBay has been rubbish. I need a 3/16 female straight union m10 x1 The ones I have bought will not seal as the seats are badly formed. Alternatively, a good compression connector for joining 3/16 pipe

11-05-20, 05:52 PM	#7
John. 4 ring whore! Classic Audi Club Member Join Date: Mar 2011 Location: Scottish Borders. Posts: 7,535	Go to a motor factors that deal with the trade.....and you'll get decent fittings. I can't think of a brand name , sorry.

11-05-20, 07:06 PM	#9
John. 4 ring whore! Classic Audi Club Member Join Date: Mar 2011 Location: Scottish Borders. Posts: 7,535	Could you maybe use a suitably sized drill to reface the seat that seals with the pipe??