When sourcing UPC (Uniform Plumbing Code) pedestal sinks, the most critical factor is compliance with ASME A112.19.2/CSA B45.1 standards. You must ensure the material is high-quality vitreous china, which offers a non-porous, high-gloss finish resistant to fading and scratching. Key dimensions to verify include the pre-drilled faucet hole centers (typically 4-inch centerset or 8-inch widespread) and the overflow drain compatibility. For commercial projects, ensure the sink meets ADA (Americans with Disabilities Act) height and clearance requirements.