City of London Hotel

One of several major internal drainage descales to get sites operational after lockdown

The site: The City of London Hotel.

The problem: The Covid-19 lockdown in Spring 2020 meant that many office and hotel drainage and plumbing systems were shut down completely. On many sites Metro Mechanical work on, this caused pipework to dry out and become filled with heavy scale, which created serious blockages. We were called to a major high-rise hotel in the City of London after routine legionella testing had led to flooding in multiple rooms.


City of London Hotel investigation

Our 24/7 helpdesk assigned reactive engineers to clear the flood and remove the blockages

All our reactive crews carry camera equipment, so they were able to assess the state of the internal stacks at once

A full site clean using powerful Picote equipment was recommended to address the major scale issues


City of London Hotel remediation

As this was a ‘live’ site (i.e. the hotel was in use), we had to work carefully with the FMs to phase our work

We painstakingly carried out our work room-by-room, floor-by-floor over a number of weeks

Our drainage engineers used Picote MaxiMiller coring equipment to descale the system, and checked results with camera surveys

Meanwhile, our plumbers replaced faulty pipework and added support brackets to prevent overloading joints on suspended lines

Waste was removed using one of our 7.5 tonne Cityflex tankers


We didn’t just clear the drains on this site: we comprehensively upgraded the system

We eliminated a major environmental and health & safety risk to the site

We allowed the hotel to trade fully after the initial Covid-19 lockdown