Drain Express, a top Toronto plumbing service, provides a clear guide on drain line vs sewer line differences at https://drainexpress.ca/drain-line-vs-sewer-line-key-differences-you-should-know/. Drain lines carry wastewater from fixtures like toilets and sinks, while sewer lines transport all waste to city sewers or septic tanks. Understanding these differences can reduce repair costs by up to 20%, according to industry estimates. Drain Express uses CCTV inspections and hydro-jetting for effective, non-invasive repairs. A drain line clog affects a single fixture, while a sewer line issue disrupts all plumbing. Their 24/7 GTA services offer quick, professional solutions. They recommend maintenance every 18-24 months to avoid blockages. Drain Express is a trusted choice for maintaining plumbing efficiency.