Well along time ago I removed my BAC valve on my s4 TII 13b and now I regret it so im going to put i back on. I have removed alot of stuff off teh engine and I cant remember where hoses need to go.

Im assuming "C" goes to I/C piping for air. and "A" and "B" are for water in and water out? does it matter which is water in and which is out? or where in the coolant system the water comes and goes from?

the reason I ask is because I stupidly took out the one piece off teh back of the waterpump that waht I think went to the bac valve and tapped it out for an aftermarket water temp gauge... fuuu

Any Ideas where I can get water too and from for it?

 

nvm figured it out

 

You probably already figured it out, but you don't need a coolant source at all. Pop the coolant section off (it's just glued on), and worry about the air inlet only. The only reason coolant flows through the BAC is to ensure a uniform temperature, but it's pretty much over-engineering on Mazda's part. I have had mine bypassed for 3 years now, and the BAC works just fine.