Stadler-Viega offers both 1" and 1-1/2" diameter solid brass supply and return manifolds. They are provided with 6-5/8" spacing brackets for compact remote mounting. The 1" manifold can be attached easily to the Stadler-Viega Injection Station and provides both balancing and shut-off valves. Both manifold sizes allow for an unlimited number of outlets. Stadler-Viega. Circle 8.