What is the difference between “sole source” and “single source” product specifications?
SOLE SOURCE and SINGLE SOURCE manufacturer limitations are not the same. A specification is sole source when there is only one manufacturer’s product allowed for a particular hardware item (no-substitution). Under quality assurance stipulations, specifications should always contain single sourced limitation language. This ensures like products will all come from the same manufacturer instead of risking having mixed products from different manufacturers all on the same project. In this manner, it will not matter if the hardware is divided up among a steel and wood door distributor, an aluminum glass house and a systems integrator. According to the specification, all of the like products must match and must come from the same single manufacturer.
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