Which PVC cement?

http://www.savko.com/partlist.asp?pgid=8

always use a primer first, purple primer is only used for visable inspection purposes so you can just use clear primer. the cement says right on the tin what its to be used for...sound like you would need the third and fourth tins on the above site for your flex PVC,. get em at any local plumbing supplier...
Cheers!