The Task

DrainsAid were tasked with the restoration of a variety of small and medium diameter drainage pipes, at a General Hospital in North Wales.

A CCTV investigation of the hospital’s drainage system showed heavy scaling in a number of the cast-iron and vitrified clay pipes.

Numerous small cracks and fractures were found, which would require localised patch repairs to prevent further deterioration.

Certain lengths of the system also had large amounts of debris within the pipeline, which would require desilting.

Our Approach

With the hospital’s departments in operation 24 hours a day, we maintained regular communication with the staff to ensure we undertook the works at times deemed most suitable for their routines.P

Our project manager worked closely with the hospital’s clinical team to determine when certain works should be carried out. We were able to use the Picote products in normal working hours (8am-5pm), as they cause minimal disruption. However, some services needed to be undertaken in quieter, out of work, hours.

Our portable Picote Maxi Miller was used to cleanse and descale the smaller diameter (75-100mm) lengths of pipe. This equipment allows for a fast and efficient cleaning method, that removes tough scale and calcium, as well as soft blockages.

For larger diameter pipes of 150-300mm, we used a combination of van pack units and jet-vac tankers, to remove large build-ups of debris.

For heavy-duty jetting, we added either a powerful Warthog spinning head, or flail jet to proficiently remove advanced build-ups of scale and stubborn blockages.

We completed two 100mm x 500mm CIPP patch repairs, to repair two displaced joints within the vitrified clay lines.

In addition, we completed the installation of four 150mm x 500mm and 150mm x 1000mm patches, to repair a series of longitudinal cracks and fractures.

DrainsAid Patch Repair Diagram

During our time at the hospital, we adhered to all aspects of the Wales NHS Trust Environmental Policy and procedures, including their waste management and discharges to water policies.

We were also required to follow the Health Boards Infection Control Standards at all times. This included erecting sustainable work enclosures around our work stations, which allowed drainage covers to be removed in a safe manner, without exposing staff, patients, or visitors to associated infection risks.

Each work station was thoroughly cleaned after use, so as not to compromise the health of staff and patients.

The Results

Upon completion, our clients were very happy with the high-standard of work and quality service provided throughout the project.

For more information about how Picote products could be used to rehabilitate the pipes in your property, read our brochure here. Or Ring 08000180123, or use our contact form to speak to one of our team about any of the internal drainage services we offer.