Blocked Drains in City of London

City of London drainage covers EC1, EC2, EC3, and EC4, taking in Bank, Liverpool Street, Cheapside, Barbican, Smithfield, Aldgate, Moorgate, and Fleet Street. The Square Mile is dominated by commercial offices with high-flow trade waste, plus residential stock in the Barbican and around Aldgate, period buildings around Smithfield, and warehouse conversions east of Liverpool Street. Target arrival is 30 to 60 minutes for blocked drains, sewage backups, and CCTV survey work, with out-of-hours dispatch prioritised to avoid trading-day disruption.

The operational reality is dense buried infrastructure: Victorian 225 mm and 300 mm brick sewers shared by multiple commercial buildings, modern 150 mm PVCu laterals serving newer fit-outs, and grease-trap installations on every active restaurant unit. Our crews dispatch with the Harben P30 4000 PSI jetting trailer, a 90 m CCTV crawler for mainline survey work, Sewerin acoustic location for the runs that no longer match the original drainage plans, and electromechanical rodding gear for compacted fat and food waste. Drain unblock priced at our flat half-hour labour rate, with no callout fee (see /pricing), CCTV survey with depth-logged report from £350.

Strict access protocols for managed buildings mean we coordinate with FM teams before any intervention, and high-rise commercial-grade booster pumps need pressure-step diagnostics before drain pressure tests. Smithfield's Victorian market drainage and Fleet Street's listed-building constraints both require period-appropriate Class B covers and concealed reinstatement. We carry stainless-steel and cast-iron finish covers for conservation work.

CIPP cured-in-place lining to BS EN ISO 11296-4 from £500 per metre (3 m minimum run) is the standard repair across the City because excavating the Victorian highway would breach Corporation conditions. We line clay and brick mains in situ, run a post-cure CCTV survey to verify the new bore, and reinstate flow within the same trading window. Trade waste interceptor traps and backflow preventers are fitted on basement plant rooms as standard given the Thames flood-risk profile of EC4.