Drain Express, a leading Toronto plumbing service, offers practical tips for cleaning old house sewer pipes at https://drainexpress.ca/cleaning-old-house-sewer-pipes-tips-for-effective-maintenance/. Their article emphasizes preventing clogs in cast iron or clay pipes, which are susceptible to rust and root intrusion. Industry insights show that regular maintenance can reduce blockages by up to 25%. They recommend hydro-jetting and enzymatic cleaners for safe, effective cleaning. Drain Express uses advanced CCTV technology for precise pipe inspections. Biannual cleanings are advised to maintain pipe integrity and avoid backups. Their GTA-wide services provide fast, reliable solutions for homeowners. Drain Express ensures aging sewer systems remain functional and efficient.