Join Date: Feb 2002
Location: N.W. Washington
i dont think the 68's have the (1 inlet, 2 outlet) check valve, from what i've read, they just have the 1 way (filter?) valve on the line from the manifold vacuum. all my hoses on my rs are original, it seems, and it has the 1 valve only, from the man. vacuum. thats the difference w/ the 68 to 69 vacuum canisters, the 68 has two hookups, whereas the 69 has 1, because it's split at the check valve. not an expert by any means, this is just what i've experienced so far. good luck!