Editorial Policy

Our guides exist to help you make a sound decision before money changes hands. We write from published plumbing codes, federal guidance, manufacturer instructions, and industry association material. We cite sources in the text. We do not invent credentials, prices, or local facts. Every guide shows when it was published and when it was last reviewed. When a fact needs a local source we cannot verify, we say so on the page and tell you how to check it. Corrections: if you find an error, contact us and we will review it and note the change. Advertising never decides our recommendations; pros cannot pay for placement in guides.