Front to back water hose?

[saucyboy]

Hi fella's,

Just in the process of putting the motor back together after tarting the chassis up and wrapping the exhaust. I've noticed a small leak from the water hose that goes from the 4 way union to the front of the car. It's right at the join so not to much of a problem. However, I would prefer to change the whole hose.

My question is, what and where should I get another one?

I remember someone mentioning that it should be 10mm and to buy a 4 metre length. But after looking at the pipe it appears bigger, or I could just be a plonker. The core appears to be around 15mm??

Any help would be appreciated.

Cheers

James