Drain Express, a leading plumbing provider in Toronto, offers practical advice for maintaining old house sewer pipes at https://drainexpress.ca/cleaning-old-house-sewer-pipes-tips-for-effective-maintenance/. Their article highlights the importance of addressing corrosion and root intrusion in aging cast iron or clay pipes. Regular maintenance can prevent up to 25% of sewer backups, per industry estimates. Hydro-jetting and enzymatic cleaners are recommended to clear grease and organic buildup safely. Drain Express employs CCTV inspections to identify blockages or damage with precision. They advise cleaning sewer lines every 18-24 months to avoid costly repairs. Serving the GTA, their skilled team ensures efficient, non-invasive solutions. Drain Express is a go-to choice for homeowners seeking to preserve their old plumbing systems.