Where to find booster check valve on mazda 5?

Hi, i replaced my booster on mazda 5 but i think my check valve is leaking also. Blew on both ends and air travels both ways. I tried looking online and couldnt find any places that sells the check valve also called dealer ship and they said it comes with the booster and the thing is 4x the cost of the booster i bought . Anyone knows where i could buy just the check valve? Thanks

 

Don't know anything about the 5 as this is a Mazdaspeed forum but giving the similarities between the 5 and the 3 it might be the same. On the 3 it is internal to the booster hose and the entire hose must be replaced

 

Ohh is the check valve apart of the hose itself not the 90? Thanks

 

It is part of the hose on a mazdaspeed

 

Thanks, with ur comment and i think i seen another thread i was able to determine the check valve wasnt it and the intake box wasnt on fully